用户信息列表展示案例

需求分析和设计

1、需求：用户信息的增删改查操作

2、设计：

　　1、技术选型：Servlet+JSP+MySQL+JDBCTempleat+Druid+BeanUtils+tomcat

　　2、数据库设计：

create database day17; -- 创建数据库
use day17;                -- 使用数据库
create table user(   -- 创建表
    id int primary key auto_increment,
    name varchar(20) not null,
    gender varchar(5),
    age int,
    address varchar(32),
    qq    varchar(20),
    email varchar(50)
);

insert  into `user`(`id`,`name`,`gender`,`age`,`address`,`qq`,`email`) values (1,'张三','男',13,'陕西','12345','zhangsan@qq.cn');
insert  into `user`(`id`,`name`,`gender`,`age`,`address`,`qq`,`email`) values (2,'李四','女',15,'北京','88888','ls@qq.cn');

3、开发：

　　1、环境搭建

　　　　1、创建数据库环境

　　　　2、创建项目，导入需要的jar包

　　2、编码

4、测试

5、部署运维

 

 

 

 

列表查询的分析

 

User实体类：

 

package com.Case17.domain;

public class User {
    private int id;
    private String name;
    private String gender;
    private int age;
    private String address;
    private String qq;
    private String email;

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", gender='" + gender + '\'' +
                ", age=" + age +
                ", address='" + address + '\'' +
                ", qq='" + qq + '\'' +
                ", email='" + email + '\'' +
                '}';
    }

    public User() {
    }

    public User(int id, String name, String gender, int age, String address, String qq, String email) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.address = address;
        this.qq = qq;
        this.email = email;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getQq() {
        return qq;
    }

    public void setQq(String qq) {
        this.qq = qq;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }
}

 

UserDao接口：

/**
 * 用户操作的dao
 */
public interface UserDao {

    public List<User> findAll();
}

 

导入JDBCUtils工具类和druid.properties配置文件

UserDaoImpl：

 

public class UserDapImpl implements UserDao {
    private JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
    @Override
    public List<User> findAll() {
        //实现JDBC数据库操作
        //1、定义sql
        String sql = "select * from user";
        List<User> users = template.query(sql, new BeanPropertyRowMapper<User>(User.class));
        return users;
    }
}

 

UserService接口：

public interface UserService {

    public List<User> findAll();
}

UserServiceImpl：

public class UserServiceImpl implements UserService {
    public UserDao dao = new UserDapImpl();
    @Override
    public List<User> findAll() {
        //调用dao完成查询
        return dao.findAll();
    }
}

UserListServlet：

 

@WebServlet("/userListServlet")
public class UserListServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1、调用UserService完成查询
        UserService service = new UserServiceImpl();
        List<User> users = service.findAll();
        //2、将list存入request域
        request.setAttribute("users",users);
        //3、转发到list.jsp
        request.getRequestDispatcher("/list.jsp").forward(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 

index.jsp：

<div align="center">
  <a
          href="${pageContext.request.contextPath}/userListServlet" style="text-decoration:none;font-size:33px">查询所有用户信息
  </a>
</div>

list.jsp：

    <table border="1" class="table table-bordered table-hover">
        <tr class="success">
            <th>编号</th>
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
            <th>籍贯</th>
            <th>QQ</th>
            <th>邮箱</th>
            <th>操作</th>
        </tr>

        <c:forEach items="${users}" var="user" varStatus="s">
            <tr>
                <td>${s.count}</td>
                <td>${user.name}</td>
                <td>${user.gender}</td>
                <td>${user.age}</td>
                <td>${user.address}</td>
                <td>${user.qq}</td>
                <td>${user.email}</td>
                <td><a class="btn btn-default btn-sm" href="update.html">修改</a>&nbsp;<a class="btn btn-default btn-sm" href="">删除</a></td>
            </tr>
        </c:forEach>

        <tr>
            <td colspan="8" align="center"><a class="btn btn-primary" href="add.html">添加联系人</a></td>
        </tr>
    </table>