Mybatis案例升级版

纯Mybatis案例升级版——小案例大道理

前言：

这几天看了一本书《原则》，在上面看到了一句话叫“每个人都把自己眼界的局限当成世界的局限”，大学生是🐟，大学就是鱼缸，世界很大，希望大家好好努力，不要让“贫穷”限制了你的思维。

暑假的时候写了一篇《Mybatis案例超详解》，遗留了一些问题，欠的债现在该还了，刚开学，学校事比较多，这几天脑子里还装着好几篇博客，一直腾不出时间写，今天咬咬牙，先把这篇补上。

案例准备

因为和之前写的是同一个案例，环境也都一样，我就不重复了，需要的朋友去看之前的博客，我直接上代码了。

案例演示

 

 

 

 

 

 

案例结构及代码

 

 

 

 

 

 

 

表结构

users表

 

 

 

 

address表

 

 

 

 

复制代码
 USE moocmybatis;
 CREATE TABLE ADDRESS(
 id INT AUTO_INCREMENT PRIMARY KEY COMMENT '主键',
 userid INT COMMENT '外键：关联用户表主键',
 defaultAddr BOOLEAN COMMENT '是否默认地址',
 nation VARCHAR(20) COMMENT '国家',
 province VARCHAR(20) COMMENT '省区',
 city VARCHAR(20) COMMENT '市区',
 country VARCHAR(20) COMMENT '县区',
 street VARCHAR(100) COMMENT '街道',
 remark TEXT COMMENT '备注'
 ) CHARSET "UTF8";
 ALTER TABLE address ADD FOREIGN KEY (userid) REFERENCES users(id);
View Code
复制代码

 

 

pom.xml

 
复制代码
<dependencies>
     <dependency>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis</artifactId>
         <version>3.4.6</version>
     </dependency>
     <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>5.1.38</version>
     </dependency>
     <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>javax.servlet-api</artifactId>
         <version>3.1.0</version>
     </dependency>
     <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>jstl</artifactId>
         <version>1.2</version>
     </dependency>
     <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>1.2.17</version>
     </dependency>
     <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>4.12</version>
         <scope>test</scope>
     </dependency>
 </dependencies>
View Code
复制代码

 

mybatis-config.xml

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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
​
    <!--
    properties配置，用于加载外部的properties配置文件
    -->
    <properties resource="db.properties"></properties>
​
    <!--
    environments 主要用于进行数据源的配置
    可以配置多个数据源~ 通过default属性来指定当前项目运行过程中使用的是哪个数据源
    -->
    <environments default="development">
        <!--
        environment 用于配置一个具体的独立的数据源
        id属性用于给当前数据源定义一个名称，方便我们的项目指定
        -->
        <environment id="development">
            <!--
            transactionManager用于配置事务管理，默认情况下使用的是JDBC事务管理
            -->
            <transactionManager type="JDBC"/>
            <!--
            dataSource具体数据源的链接信息；type属性用于指定是否使用连接池
            -->
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
    <!-- mappers主要用于配置我们外部的映射配置文件
        在主配置文件中需要引入加载映射配置文件
     -->
    <mappers>
        <!-- mapper主要配置引入某一个具体的映射文件，resource进行路径方式的引入 -->
        <mapper resource="mapper/usersMapper.xml"/>
    </mappers>
</configuration>

　　

db.properties

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driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/moocmybatis?useUnicode=true&characterEncoding=utf8
username=root
password=root

　　

log4j.properties

 
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log4j.rootLogger=DEBUG, A1
 log4j.appender.A1=org.apache.log4j.ConsoleAppender
 log4j.appender.A1.layout=org.apache.log4j.PatternLayout
 log4j.appender.A1.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n

　　

usersMapper.xml

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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--
mapper 用于定义一个映射配置文件的根节点
namespace属性是用来配置命名空间，主要进行session级别的缓存管理
命名空间默认情况下，使用我们当前操作的实体类的全路径
-->
<mapper namespace="com.demo.entity.Users">
    <!--<select id="findUsers" resultType="com.demo.entity.Users">-->
    <select id="findUsers" resultMap="forUsers">
        select * from users
        <if test="id !=null">
            where id=#{id}
        </if>
    </select>
    <select id="findUsersByName" resultMap="forUsers">
        select * from users
        <if test="name !=null">
            where username=#{name}
        </if>
    </select>
​
    <!-- 自定义映射关系集合：主要包含对于一些自定义操作的配置，如不一致的属性和字段 -->
    <resultMap id="forUsers" type="com.demo.entity.Users">
        <!-- 绑定id主键 -->
        <id property="id" column="id"></id>
        <!-- result配置，主要配置普通属性，column表示配置的是数据库字段名称 property配置的是实体类的属性名称 -->
        <result column="username" property="name"></result>
        <collection property="addresses" column="id" ofType="com.demo.entity.Address" select="getAddress"></collection>
    </resultMap>
    <select id="getAddress" resultType="com.demo.entity.Address">
        select * from address where userid = #{id}
    </select>
    <sql id="user_fields">
        username, userpass, nickname, age, gender, email, phone, createTime, updateTime, lastLogin, userstatus, remark
    </sql>
​
    <insert id="addUser" useGeneratedKeys="true" keyProperty="id">
        insert into users( <include refid="user_fields"></include>)
        values(#{name},#{userpass}, #{nickname}, #{age}, #{gender}, #{email}, #{phone}, #{createTime}, #{updateTime}, #{lastLogin}, #{userStatus}, #{remark})
    </insert>
    <!--<insert id="addUser" useGeneratedKeys="true" keyProperty="id">-->
        <!--insert into users(username,userpass,nickname,age,gender,email,phone,createTime,updateTime,lastLogin,userStatus,remark)-->
        <!--values(#{name},#{userpass}, #{nickname}, #{age}, #{gender}, #{email}, #{phone}, #{createTime}, #{updateTime}, #{lastLogin}, #{userStatus}, #{remark})-->
    <!--</insert>-->
    <!--<select id="findById" resultType="com.demo.entity.Users">-->
        <!--select * from users where id = #{id};-->
    <!--</select>-->
    <update id="updateUser">
        update users
        <set>
            <if test="name != null">username = #{name},</if>
            <if test="userpass != null">userpass = #{userpass},</if>
            <if test="nickname != null">nickname = #{nickname},</if>
            <if test="age != null">age = #{age},</if>
            <if test="gender != null">gender = #{gender},</if>
            <if test="email != null">email = #{email},</if>
            <if test="phone != null">phone = #{phone},</if>
            <if test="createTime != null">createTime = #{createTime},</if>
            <if test="updateTime != null">updateTime = #{updateTime},</if>
            <if test="lastLogin != null">lastlogin = #{lastLogin},</if>
            <if test="userStatus != null">userStatus = #{userStatus},</if>
            <if test="remark != null">remark = #{remark},</if>
        </set>
        where id = #{id}
    </update>
    <!--<update id="updateUser">-->
        <!--update users set-->
            <!--username = #{name},-->
            <!--userpass = #{userpass},-->
            <!--nickname = #{nickname},-->
            <!--age = #{age},-->
            <!--gender = #{gender},-->
            <!--email = #{email},-->
            <!--phone = #{phone},-->
            <!--createTime = #{createTime},-->
            <!--updateTime = #{updateTime},-->
            <!--lastlogin = #{lastLogin},-->
            <!--userStatus = #{userStatus},-->
            <!--remark = #{remark}-->
        <!--where id = #{id}-->
    <!--</update>-->
    <delete id="delUser">
        delete from users where id = #{id}
    </delete>
</mapper>

　　

web.xml

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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         id="WebApp_ID" version="3.1">
    <display-name>mybatispro</display-name>
​
    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>
​
</web-app>

　　

dao

UsersDao
 
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package com.demo.dao;
 ​
 import com.demo.entity.Users;
 import com.demo.utils.SqlSessionFactoryUtils;
 import org.apache.ibatis.session.SqlSession;
 ​
 import java.util.List;
 ​
 public class UsersDao {
     private SqlSession session ;
     private List<Users> list;
     private Users user;
 ​
     public SqlSession getSession(){
         session =  SqlSessionFactoryUtils.getSqlSessionFactory().openSession();
         return session;
     }
 ​
     /**
      * 查询所有用户
      * @return
      */
     public List<Users> findAll(){
         try {
             list = getSession().selectList("findUsers");
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
         return list;
     }
 ​
     /**
      * 根据id查询单个用户
      * @return
      */
     public Users findById(Integer id){
         try {
             user = getSession().selectOne("findUsers",new Users(id));
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
         return user;
     }
 ​
     /**
      * 根据name查询单个用户
      * @return
      */
     public Users findByName(String name){
         try {
             user = getSession().selectOne("findUsersByName",new Users(name));
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
         return user;
     }
 ​
     /**
      * 添加一个用户
      * @param user
      * @return
      */
     public Users addUser(Users user){
         try {
             //返回值是insert执行过程中影响的行数
             getSession().insert("addUser",user);
             session.commit();
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
         return user;
     }
 ​
     /**
      * 修改一个用户
      * @param user
      * @return
      */
     public Users updateUser(Users user){
         try {
             //返回值是insert执行过程中影响的行数
             getSession().update("updateUser",user);
             session.commit();
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
         return user;
     }
 ​
     /**
      * 删除一个用户
      * @param id
      */
     public void delUser(Integer id){
         try {
             //返回值是insert执行过程中影响的行数
             getSession().delete("delUser",id);
             session.commit();
         }catch (Exception e){
             e.printStackTrace();
         }finally {
             session.close();
         }
 ​
     }
 ​
     /**
      * 用户登录
      * @param user
      */
     public boolean login(Users user){
         boolean flag = false;
         try {
            Users users = findByName(user.getName());
                 if (users.getName().equals(user.getName())&&users.getUserpass().equals(user.getUserpass())){
                     flag=true;
                 }
 ​
 ​
 ​
         }catch (Exception e){
             e.printStackTrace();
         }
         return flag;
     }
 }

　　

entity

Address
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package com.demo.entity;
 
/**
 * 地址表，关联用户数据
 *
 * 一个用户可以有多个地址，有一个是默认地址
 */
public class Address {
 
    private Integer id;         // 编号
    private Users user;         // 所属用户
    private Boolean defaultAddr;  // 是否默认地址
    private String nation;      // 国家
    private String province;    // 省
    private String city;        // 市
    private String country;     // 县
    private String street;      // 街道
    private String remark;      // 描述
 
    public Integer getId() {
        return id;
    }
 
    public void setId(Integer id) {
        this.id = id;
    }
 
    public Users getUser() {
        return user;
    }
 
    public void setUser(Users user) {
        this.user = user;
    }
 
    public String getNation() {
        return nation;
    }
 
    public void setNation(String nation) {
        this.nation = nation;
    }
 
    public Boolean getDefaultAddr() {
        return defaultAddr;
    }
 
    public void setDefaultAddr(Boolean defaultAddr) {
        this.defaultAddr = defaultAddr;
    }
 
    public String getProvince() {
        return province;
    }
 
    public void setProvince(String province) {
        this.province = province;
    }
 
    public String getCity() {
        return city;
    }
 
    public void setCity(String city) {
        this.city = city;
    }
 
    public String getCountry() {
        return country;
    }
 
    public void setCountry(String country) {
        this.country = country;
    }
 
    public String getStreet() {
        return street;
    }
 
    public void setStreet(String street) {
        this.street = street;
    }
 
    public String getRemark() {
        return remark;
    }
 
    public void setRemark(String remark) {
        this.remark = remark;
    }
 
    @Override
    public String toString() {
        return "Address{" +
                "id=" + id +
                ", user=" + user +
                ", isDefault=" + defaultAddr +
                ", province='" + province + '\'' +
                ", city='" + city + '\'' +
                ", country='" + country + '\'' +
                ", street='" + street + '\'' +
                ", remark='" + remark + '\'' +
                '}';
    }
}

　　

Users
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package com.demo.entity;
 
import java.util.Date;
import java.util.List;
 
/**
 * Created by mouwe on 2017/5/17.
 * resource:mybatis-config.xml
 * InputStream
 * SqlSessionFactory
 * SqlSession
 * 执行我们的配置好的SQL语句
 */
public class Users {
 
    private Integer id;                 // 用户编号
    //更换与表对应的字段
    private String name;                // 登录账号
    private String userpass;            // 登录密码
    private String nickname;            // 用户昵称
    private Integer age;                // 用户年龄
    private String gender;              // 用户性别
    private String phone;               // 联系方式
    private String email;               // 用户邮箱
    private Date createTime;            // 创建时间
    private Date updateTime;            // 账号最后修改时间
    private Date lastLogin;             // 用户最后登录时间
    private Integer userStatus;         // 用户账号状态 0 正常 1 锁定 2 删除
    private String remark;              // 用户备注信息
    private List<Address> addresses;    // 用户地址信息【地址列表，有一个是默认地址】
 
    public Users() {
    }
 
    public Users(Integer id) {
        this.id = id;
    }
    public Users(String name){this.name=name;}
 
    public Users(String name, String userpass, String nickname, Integer age, String gender, String phone, String email) {
        this.name = name;
        this.userpass = userpass;
        this.nickname = nickname;
        this.age = age;
        this.gender = gender;
        this.phone = phone;
        this.email = email;
    }
 
    public Users(Integer id, String nickname, Integer age, String gender, String phone, String email, Date updateTime, String remark) {
        this.id = id;
        this.nickname = nickname;
        this.age = age;
        this.gender = gender;
        this.phone = phone;
        this.email = email;
        this.updateTime = updateTime;
        this.remark = remark;
    }
 
    public Users(String name, String userpass, String nickname, Integer age, String gender, String phone, String email, Date createTime, Date updateTime, Date lastLogin, Integer userStatus) {
        this.name = name;
        this.userpass = userpass;
        this.nickname = nickname;
        this.age = age;
        this.gender = gender;
        this.phone = phone;
        this.email = email;
        this.createTime = createTime;
        this.updateTime = updateTime;
        this.lastLogin = lastLogin;
        this.userStatus = userStatus;
    }
 
    public Users(Integer id, String nickname, Integer age, String gender, String phone, String email, String remark) {
        this.id = id;
        this.nickname = nickname;
        this.age = age;
        this.gender = gender;
        this.phone = phone;
        this.email = email;
        this.remark = remark;
    }
 
    public Integer getId() {
        return id;
    }
 
    public void setId(Integer id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getUserpass() {
        return userpass;
    }
 
    public void setUserpass(String userpass) {
        this.userpass = userpass;
    }
 
    public String getNickname() {
        return nickname;
    }
 
    public void setNickname(String nickname) {
        this.nickname = nickname;
    }
 
    public Integer getAge() {
        return age;
    }
 
    public void setAge(Integer age) {
        this.age = age;
    }
 
    public String getGender() {
        return gender;
    }
 
    public void setGender(String gender) {
        this.gender = gender;
    }
 
    public String getPhone() {
        return phone;
    }
 
    public void setPhone(String phone) {
        this.phone = phone;
    }
 
    public String getEmail() {
        return email;
    }
 
    public void setEmail(String email) {
        this.email = email;
    }
 
    public Date getCreateTime() {
        return createTime;
    }
 
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }
 
    public Date getUpdateTime() {
        return updateTime;
    }
 
    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }
 
    public Date getLastLogin() {
        return lastLogin;
    }
 
    public void setLastLogin(Date lastLogin) {
        this.lastLogin = lastLogin;
    }
 
    public Integer getUserStatus() {
        return userStatus;
    }
 
    public void setUserStatus(Integer userStatus) {
        this.userStatus = userStatus;
    }
 
    public String getRemark() {
        return remark;
    }
 
    public void setRemark(String remark) {
        this.remark = remark;
    }
 
    public List<Address> getAddresses() {
        return addresses;
    }
 
    public void setAddresses(List<Address> addresses) {
        this.addresses = addresses;
    }
 
 
 
    @Override
    public String toString() {
        return "Users{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", userpass='" + userpass + '\'' +
                ", nickname='" + nickname + '\'' +
                ", age=" + age +
                ", gender='" + gender + '\'' +
                ", phone='" + phone + '\'' +
                ", email='" + email + '\'' +
                ", createTime=" + createTime +
                ", updateTime=" + updateTime +
                ", lastLogin=" + lastLogin +
                ", userStatus=" + userStatus +
                ", remark='" + remark + '\'' +
                ", addresses=" + addresses +
                '}';
    }
}

　　

listener

InitSqlSessionListener
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package com.demo.listener;
 
import com.demo.utils.SqlSessionFactoryUtils;
 
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
 
@WebListener
public class InitSqlSessionListener implements ServletContextListener {
    @Override
    public void contextInitialized(ServletContextEvent servletContextEvent) {
        System.out.println("容器加载中。。。。。");
        //初始化SqlSessionFactory对象
        SqlSessionFactoryUtils.initSqlSessionFactory();
    }
 
    @Override
    public void contextDestroyed(ServletContextEvent servletContextEvent) {
        System.out.println("容器销毁中。。。。。");
        //关闭SqlSession对象
        SqlSessionFactoryUtils.close();
    }
}

　　

servlet

UserAddServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Date;
 
@WebServlet("/addusers")
public class UserAddServlet extends HttpServlet {
    private UsersDao usersDao = new UsersDao();
 
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取要添加的用户数据
        String username = req.getParameter("username");
        String userpass = req.getParameter("userpass");
        String nickname = req.getParameter("nickname");
        String age = req.getParameter("age");
        String gender = req.getParameter("gender");
        String email = req.getParameter("email");
        String phone = req.getParameter("phone");
        //根据用户数据创建一个用户对象
        Users user = new Users(username, userpass, nickname, Integer.parseInt(age), gender, email, phone, new Date(), new Date(), new Date(), 0);
        //将用户对象添加到数据库中
        user =  usersDao.addUser(user);
        //查看刚新增的用户数据
        resp.sendRedirect("/detail?id=" + user.getId());
    }
}

　　

UserDelServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/deluser")
public class UserDelServlet extends HttpServlet {
    private UsersDao usersDao = new UsersDao();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取参数
        String id = req.getParameter("id");
        String type = req.getParameter("type");
 
        //执行删除或者锁定
        if ("lock".equals(type)){
            //执行锁定操作：update操作
        Users user = new Users();
        user.setId(Integer.parseInt(id));
        user.setUserStatus(1);
        usersDao.updateUser(user);
        }else if ("del".equals(type)){
            //执行删除操作：delete操作
            usersDao.delUser(Integer.parseInt(id));
        }else if ("unlock".equals(type)){
            //执行解锁操作：update操作
            Users user = new Users();
            user.setId(Integer.parseInt(id));
            user.setUserStatus(0);
            usersDao.updateUser(user);
        }
 
        //跳转到首页
        resp.sendRedirect("/index");
    }
}

　　

UserFindByIdServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
import org.apache.log4j.Logger;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
 
@WebServlet("/detail")
public class UserFindByIdServlet extends HttpServlet {
    /**
     * 创建对应的日志记录对象，通过不同的级别进行日志的记录【DEBUG\WARN\INFO\LOG】
     */
    private Logger log = Logger.getLogger(UserFindByIdServlet.class);
 
    private UsersDao usersDao = new UsersDao();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String id = req.getParameter("id");
        log.info("获取到查询参数id-->"+id);
        Users user = usersDao.findById(Integer.parseInt(id));
        log.info("查询完成，查询到的数据-->"+user);
        req.setAttribute("user",user);
        req.getRequestDispatcher("detail.jsp").forward(req,resp);
 
    }
}

　　

UserLoginServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import java.io.IOException;
 
@WebServlet("/login")
public class UserLoginServlet extends HttpServlet {
    UsersDao usersDao = new UsersDao();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        Users user = new Users();
        user.setName(username);
        user.setUserpass(password);
        boolean flag = usersDao.login(user);
        HttpSession session = req.getSession();
        if (flag){
            req.setAttribute("user",user);
            String remenber = req.getParameter("remenber");
            if ("true".equals(remenber)){
                //使用cookie
                Cookie cookie1 =new Cookie("username",username);
                Cookie cookie2 = new Cookie("password",password);
//                cookie1.setPath("/index");
//                cookie2.setPath("/index");
                cookie1.setMaxAge(60*60*24);
                cookie2.setMaxAge(60*60*24);
                resp.addCookie(cookie1);
                resp.addCookie(cookie2);
                //使用session
 
                session.setAttribute("username",username);
                session.setAttribute("password",password);
 
            }
 
            session.setAttribute("user",user);
 
            req.getRequestDispatcher("/home.jsp").forward(req,resp);
        }else {
            req.setAttribute("msg","用户名或密码错误");
            req.getRequestDispatcher("/login.jsp").forward(req,resp);
        }
 
    }
}

　　

UsersFindServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
 
@WebServlet("/index")
public class UsersFindServlet extends HttpServlet{
 
    private UsersDao usersDao = new UsersDao();
 
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        List<Users> list = usersDao.findAll();
        req.setAttribute("usersList",list);
        req.getRequestDispatcher("index.jsp").forward(req,resp);
    }
}

　　

UsersUpdateServlet
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package com.demo.servlet;
 
import com.demo.dao.UsersDao;
import com.demo.entity.Users;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Date;
 
@WebServlet("/updateusers")
public class UsersUpdateServlet extends HttpServlet {
 
    private UsersDao usersDao = new UsersDao();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req, resp);
    }
 
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 
        //获取用户要更新的数据
        String id = req.getParameter("id");
        String nickname = req.getParameter("nickname");
        String age = req.getParameter("age");
        String gender = req.getParameter("gender");
        String email = req.getParameter("email");
        String phone = req.getParameter("phone");
        String remark = req.getParameter("remark");
        //创建用户对象
        Users user = new Users(Integer.parseInt(id), nickname, Integer.parseInt(age), gender, email, phone, new Date(),remark);
        //提交更新
        usersDao.updateUser(user);
        //查看更新后的用户数据
        resp.sendRedirect("/detail?id=" + user.getId());
    }
}

　　

utils

CookieUtils
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package com.demo.utils;
 
import javax.servlet.http.Cookie;
 
public class CookieUtils {
    public static Cookie findCookie(Cookie[] cookies, String name){
        if (cookies==null){
            //说明客户端没有携带Cookie
            return null;
        }else {
            //说明客户端携带Cookie
            for (Cookie cookie:cookies){
                if (name.equals(cookie.getName())){
                    return cookie;
                }
            }
            return null;
        }
    }
}

　　

SqlSessionFactoryUtils
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package com.demo.utils;
 
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 
import java.io.IOException;
import java.io.InputStream;
 
public class SqlSessionFactoryUtils {
    private static String RESOURCE = "mybatis-config.xml";
    private static SqlSessionFactory sqlSessionFactory;
    private static ThreadLocal<SqlSession> threadLocal = new ThreadLocal<SqlSession>();
 
    /**
     * 创建一个初始化SqlSessionFactory的方法
     */
    public static void initSqlSessionFactory(){
        try {
            InputStream is = Resources.getResourceAsStream(RESOURCE);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    /**
     * 获取工厂的方法
     * @return
     */
    public static SqlSessionFactory getSqlSessionFactory(){
        return sqlSessionFactory;
    }
 
    public static void close(){
        SqlSession session = threadLocal.get();
        if (session!=null){
            session.close();
            threadLocal.set(null);
        }
    }
}

　　

test

TestDemo
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import com.demo.dao.UsersDao;
import com.demo.entity.Users;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
 
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
 
public class TestDemo {
    @Test
    public void test1() throws IOException {
        String resource = "mybatis-config.xml";
        InputStream is = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);
        SqlSession session= sqlSessionFactory.openSession();
        List<Users> list = session.selectList("findUsers");
        for (Users user:list){
            System.out.println(user);
        }
        session.close();
    }
    @Test
    public void test2(){
 
        UsersDao usersDao = new UsersDao();
        List<Users> l = usersDao.findAll();
        System.out.println(l);
    }
}

　　

addusers.jsp

复制代码
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>用户管理中心</title>
    <link rel="stylesheet" href="lib/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <script src="lib/2.2.4/jquery-1.12.4.min.js"></script>
    <script src="lib/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
    <style type="text/css">
        #a1{
            margin-left:80%;
        }
    </style>
</head>
<body>
<%
    Object obj = session.getAttribute("user");
    if (obj==null){
        response.sendRedirect("/login.jsp");
    }
%>
<div class="container">
    <div class="row">
        <div class="page-header">
            <a id="a1" class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/exit.jsp" role="button" >退出登录</a>
            <h1>泰斗贤若如后台管理系统 <small>欢迎${sessionScope.user.name}</small></h1>
        </div>
    </div>
    <div class="row">
        <div class="jumbotron">
            <h1>MyBatis基础入门!</h1>
            <p>通过一个项目来完成基础部分的学习</p>
            <p><a class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/index" role="button">首页</a></p>
            <p><a class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/addusers.jsp" role="button">新增用户</a></p>
        </div>
    </div>
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <form class="form-horizontal" action="${pageContext.request.contextPath}/addusers">
                <div class="form-group">
                    <label for="username" class="col-sm-2 control-label">用户账号</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="username" name="username" placeholder="请输入用户账号">
                    </div>
                </div>
                <div class="form-group">
                    <label for="userpass" class="col-sm-2 control-label">登录密码</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="userpass" name="userpass" placeholder="请输入登录密码">
                    </div>
                </div>
                <div class="form-group">
                    <label for="nickname" class="col-sm-2 control-label">昵称</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="nickname" name="nickname" placeholder="请输入昵称">
                    </div>
                </div>
                <div class="form-group">
                    <label for="age" class="col-sm-2 control-label">年龄</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="age" name="age"  placeholder="请输入年龄">
                    </div>
                </div>
                <div class="form-group">
                    <label for="gender" class="col-sm-2 control-label">性别</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="gender" name="gender"  placeholder="请输入性别">
                    </div>
                </div>
                <div class="form-group">
                    <label for="phone" class="col-sm-2 control-label">联系方式</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="phone" name="phone"  placeholder="请输入联系方式">
                    </div>
                </div>
                <div class="form-group">
                    <label for="email" class="col-sm-2 control-label">邮箱</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="email" name="email" placeholder="请输入邮箱">
                    </div>
                </div>
                <div class="form-group">
                    <input type="submit" value="点击新增用户" class="btn btn-primary">
                </div>
            </form>
        </div>
    </div>
</div>
</body>
</html>
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detail.jsp

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>单个用户查看</title>
    <link rel="stylesheet" href="lib/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <script src="lib/2.2.4/jquery-1.12.4.min.js"></script>
    <script src="lib/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
    <style type="text/css">
        #a1{
            margin-left:80%;
        }
    </style>
</head>
<body>
<%
    Object obj = session.getAttribute("user");
    if (obj==null){
        response.sendRedirect("/login.jsp");
    }
%>
<div class="container">
    <div class="row">
        <div class="page-header">
            <a id="a1" class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/exit.jsp" role="button" >退出登录</a>
            <h1>泰斗贤若如后台管理系统 <small>欢迎${sessionScope.user.name}</small></h1>
        </div>
    </div>
    <div class="row">
        <div class="jumbotron">
            <h1>MyBatis基础入门!</h1>
            <p>通过一个项目来完成基础部分的学习</p>
            <p><a class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/index" role="button">首页</a></p>
            <p><a class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/addusers.jsp" role="button">新增用户</a></p>

        </div>
    </div>
    <c:set var="user" value="${user}"></c:set>
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <form class="form-horizontal" action="${pageContext.request.contextPath}/updateusers">
                <input type="hidden" name="id" value="${user.id}">
                <div class="form-group">
                    <label class="col-sm-2 control-label">用户账号</label>
                    <div class="col-sm-10">
                        <p class="form-control-static">${user.name}</p>
                    </div>
                </div>
                <div class="form-group">
                    <label class="col-sm-2 control-label">登录密码</label>
                    <div class="col-sm-10">
                        <p class="form-control-static">********</p>
                    </div>
                </div>
                <div class="form-group">
                    <label for="nickname" class="col-sm-2 control-label">昵称</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="nickname" value="${user.nickname}" name="nickname" placeholder="请输入昵称">
                    </div>
                </div>
                <div class="form-group">
                    <label for="age" class="col-sm-2 control-label">年龄</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="age" name="age" value="${user.age}" placeholder="请输入年龄">
                    </div>
                </div>
                <div class="form-group">
                    <label for="gender" class="col-sm-2 control-label">性别</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="gender" name="gender" value="${user.gender}" placeholder="请输入性别">
                    </div>
                </div>
                <div class="form-group">
                    <label for="phone" class="col-sm-2 control-label">联系方式</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="phone" name="phone" value="${user.phone}" placeholder="请输入联系方式">
                    </div>
                </div>
                <div class="form-group">
                    <label for="email" class="col-sm-2 control-label">邮箱</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="email" name="email" value="${user.email}" placeholder="请输入邮箱">
                    </div>
                </div>
                <div class="form-group">
                    <label class="col-sm-2 control-label">账号创建时间</label>
                    <div class="col-sm-10">
                        <p class="form-control-static">
                            <fmt:formatDate value="${user.createTime}" pattern="yyyy-MM-dd"></fmt:formatDate>
                        </p>
                    </div>
                </div>
                <div class="form-group">
                    <label class="col-sm-2 control-label">最后修改时间</label>
                    <div class="col-sm-10">
                        <p class="form-control-static">
                            <fmt:formatDate value="${user.updateTime}" pattern="yyyy-MM-dd"></fmt:formatDate>
                        </p>
                    </div>
                </div>
                <div class="form-group">
                    <label class="col-sm-2 control-label">最后登录时间</label>
                    <div class="col-sm-10">
                        <p class="form-control-static">
                            <fmt:formatDate value="${user.lastLogin}" pattern="yyyy-MM-dd"></fmt:formatDate>
                        </p>
                    </div>
                </div>
                <div class="form-group">
                    <label class="col-sm-2 control-label">用户状态</label>
                    <div class="col-sm-10">
                        <c:if test="${user.userStatus == 0}">
                            <p class="form-control-static">正常</p>
                        </c:if>
                        <c:if test="${user.userStatus == 1}">
                            <p class="form-control-static">锁定</p>
                        </c:if>
                        <c:if test="${user.userStatus == 2}">
                            <p class="form-control-static">删除</p>
                        </c:if>
                    </div>
                </div>
                <div class="form-group">
                    <label for="remark" class="col-sm-2 control-label">备注</label>
                    <div class="col-sm-10">
                        <input type="text" class="form-control" id="remark" value="${user.remark}" name="remark" placeholder="请输入备注">
                    </div>
                </div>
                <div class="form-group">
                    <input type="submit" value="提交数据更新" class="btn btn-primary">
                </div>
            </form>
        </div>
    </div>
    <div class="row">
        <table class="table table-striped">
            <tr>
                <th>地址编号</th>
                <th>国家</th>
                <th>省</th>
                <th>市</th>
                <th>县</th>
                <th>街道</th>
                <th>详细地址</th>
                <th>是否默认</th>
            </tr>
            <c:forEach var="addr" items="${user.addresses}">
                <tr>
                    <td>${addr.id}</td>
                    <td>${addr.nation}</td>
                    <td>${addr.province}</td>
                    <td>${addr.city}</td>
                    <td>${addr.country}</td>
                    <td>${addr.street}</td>
                    <td>${addr.remark}</td>
                    <c:if test="${addr.defaultAddr == true}">
                        <td>默认地址</td>
                    </c:if>
                    <c:if test="${addr.defaultAddr == false}">
                        <td>-----</td>
                    </c:if>
                </tr>
            </c:forEach>
        </table>
    </div>
</div>
</body>
</html>
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exit.jsp

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>退出登录</title>
</head>
<body>
<%
    Object obj = session.getAttribute("user");
    if (obj!=null){
        //销毁session
        session.removeAttribute("user");
        response.sendRedirect("/login.jsp");
    }else {
        //页面重定向到登录页面
        response.sendRedirect("/login.jsp");
    }
%>
</body>
</html>
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home.jsp

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>跳转</title>
</head>
<body>
<%
    response.sendRedirect("/index");
%>
</body>
</html>
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index.jsp

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<%@ page import="com.demo.entity.Users" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>用户管理中心</title>
    <link rel="stylesheet" href="lib/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <script src="lib/2.2.4/jquery-1.12.4.min.js"></script>
    <script src="lib/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
    <style type="text/css">
        #a1{
            margin-left:80%;
        }
    </style>
</head>
<body>

<%
 Object obj = session.getAttribute("user");
// Users user = null;
// if (obj instanceof Users){
//     user = (Users)obj;
// }
 if (obj==null){
     response.sendRedirect("/login.jsp");
 }
%>
<div class="container">
    <div class="row">
        <div class="page-header">
            <a id="a1" class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/exit.jsp" role="button" >退出登录</a>
            <h1>泰斗贤若如后台管理系统 <small>欢迎${sessionScope.user.name}</small></h1>

        </div>
    </div>
    <div class="row">
        <div class="jumbotron">
            <h1>MyBatis基础入门!</h1>
            <p>通过一个项目来完成基础部分的学习</p>
            <p><a class="btn btn-primary btn-lg" href="https://www.cnblogs.com/zyx110/" role="button">请关注泰斗贤若如博客园</a></p>
            <p><a class="btn btn-primary btn-lg" href="${pageContext.request.contextPath}/addusers.jsp" role="button">新增用户</a></p>
        </div>
    </div>
    <div class="row">
        <table class="table table-hover table-striped">
            <tr>
                <th>用户编号</th>
                <th>登录账号</th>
                <th>用户昵称</th>
                <th>邮箱</th>
                <th>联系方式</th>
                <th>账号创建时间</th>
                <th>用户状态</th>
                <th>操作</th>
            </tr>
            <c:forEach var="user" items="${usersList}">
                <tr>
                    <td>${user.id}</td>
                    <td>${user.name}</td>
                    <td>${user.nickname}</td>
                    <td>${user.email}</td>
                    <td>${user.phone}</td>
                    <td>
                        <fmt:formatDate value="${user.createTime}" pattern="yyyy-MM-dd HH:mm:ss"></fmt:formatDate>
                    </td>
                    <c:if test="${user.userStatus == 0}">
                        <td>正常</td>
                    </c:if>
                    <c:if test="${user.userStatus == 1}">
                        <td>锁定</td>
                    </c:if>
                    <c:if test="${user.userStatus == 2}">
                        <td>删除</td>
                    </c:if>
                    <td>
                        <a href="${pageContext.request.contextPath}/detail?id=${user.id}">查看</a>
                        <c:if test="${user.userStatus == 0}">
                            <a href="${pageContext.request.contextPath}/deluser?id=${user.id}&type=lock">锁定</a>
                        </c:if>
                        <c:if test="${user.userStatus == 1}">
                            <a href="${pageContext.request.contextPath}/deluser?id=${user.id}&type=unlock">解锁</a>
                        </c:if>
                        <a href="${pageContext.request.contextPath}/deluser?id=${user.id}&type=del">删除</a>
                    </td>
                </tr>
            </c:forEach>
        </table>
    </div>
</div>
</body>
</html>
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login.jsp

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<%@ page import="com.demo.entity.Users" %>
<%@ page import="com.demo.utils.CookieUtils" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
    <title>登录</title>
    <link rel="stylesheet" href="lib/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <script src="lib/2.2.4/jquery-1.12.4.min.js"></script>
    <script src="lib/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
</head>
<body>
<%
    String msg = (String) request.getAttribute("msg");
    String username="";
    String password="";
//    Cookie[] cookies = request.getCookies();
//    Cookie cookie1 = CookieUtils.findCookie(cookies,"username");
//    Cookie cookie2 = CookieUtils.findCookie(cookies,"password");
//
//    if (cookie1!=null&&cookie2!=null){
//        username = cookie1.getValue();
//        password = cookie2.getValue();
//    }
    username = (String)session.getAttribute("username");
    password = (String)session.getAttribute("password");

%>
<div class="container">
    <div class="row">
        <div class="page-header">
            <h1>泰斗贤若如用户管理系统 <small>来登录试试吧!</small></h1>
        </div>
    </div>
    <div class="row">
        <form class="form-horizontal" action="${pageContext.request.contextPath}/login">
            <div class="form-group">
                <label for="username" class="col-sm-2 control-label">用户名</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" id="username" name="username" value="<%=username%>">
                </div>
            </div>
            <div class="form-group">
                <label for="inputPassword3" class="col-sm-2 control-label">密码</label>
                <div class="col-sm-10">
                    <input type="password" class="form-control" id="inputPassword3" name="password" value="<%=password%>">
                </div>
            </div>
            <%
            if (msg!=null){
            %>
            <span style="color: red">${msg}</span>
            <%
                }
            %>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-10">
                    <div class="checkbox">
                        <label>
                            <input type="checkbox" name="remenber" value="true" checked="checked"> 记住我
                        </label>
                    </div>
                </div>
            </div>
            <div class="form-group">
                <div class="col-sm-offset-2 col-sm-10">
                    <button type="submit" class="btn btn-default">登录</button>
                </div>
            </div>
        </form>
    </div>
</div>
</body>
</html>
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*****************************************************************************************************

我的博客园地址：https://www.cnblogs.com/zyx110/

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