SSM整合

SSM整合

Mybatis + Spring + SpringMVC

环境

JDK 8 + Tomcat 9.0.76 + MySQL 8.0.33

数据库

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
`bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`bookName` VARCHAR(100) NOT NULL COMMENT '书名',
`bookCounts` INT(11) NOT NULL COMMENT '数量',
`detail` VARCHAR(200) NOT NULL COMMENT '描述',
KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

依赖

<!--数据库-->
<dependency>
    <groupId>com.mysql</groupId>
    <artifactId>mysql-connector-j</artifactId>
    <version>8.0.32</version>
</dependency>
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.5</version>
</dependency>

<!--Mybatis-->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.7</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>2.0.2</version>
</dependency>

<!--Spring-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.1.9.RELEASE</version>
</dependency>

<!--工具-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.24</version>
</dependency>
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>RELEASE</version>
</dependency>

<!--Servlet - JSP -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

资源导出问题

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

JDK版本乱跳

<properties>
    <maven.compiler.source>8</maven.compiler.source>
    <maven.compiler.target>8</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

项目结构

.
├── pom.xml
├── src
│   └── main
│       ├── Test
│       │   └── MyTest.java
│       ├── java
│       │   └── com
│       │       └── lu
│       │           ├── controller
│       │           │   └── BookController.java
│       │           ├── dao
│       │           │   └── BookMapper.java
│       │           ├── pojo
│       │           │   └── Books.java
│       │           └── service
│       │               ├── BookService.java
│       │               └── BookServiceImpl.java
│       ├── resources
│       │   ├── applicationContext.xml
│       │   ├── db.properties
│       │   ├── mapper
│       │   │   └── BookMapper.xml
│       │   ├── mybatis-config.xml
│       │   ├── spring-dao.xml
│       │   ├── spring-mvc.xml
│       │   └── spring-service.xml
│       └── webapp
│           ├── WEB-INF
│           │   ├── jsp
│           │   │   ├── addBook.jsp
│           │   │   ├── allBook.jsp
│           │   │   └── updateBook.jsp
│           │   └── web.xml
│           └── index.jsp
├── ssmbuild.iml
└── target

项目配置

Mybatis

  1. 连接数据库

  2. 编写db.properties

driver = com.mysql.cj.jdbc.Driver
url = jdbc:mysql://localhost:3306/ssmbuild?autoReconnect=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8
username = root
password = lu123
  1. 编写mybatis-config.xml
<?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>
    <typeAliases>
        <package name="com.lu.pojo"/>
    </typeAliases>
    <mappers>
        <mapper resource="mapper/BookMapper.xml"/>
    </mappers>
</configuration>
  1. 编写对应实体类

  • 为什么设置实体类的属性名与数据库表的字段名一致?

    • 在编写Mapper.xml时，如果传来的参数是实体类，在set或者insert方法中，可以直接将传来的属性与字段一一对应编写，不用担心参数传来莫名变空

    • <insert id="addBook" parameterType="books">
    insert into ssmbuild.books (bookName, bookCounts, detail)
    values (#{bookName}, #{bookCounts}, #{detail})
</insert>

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}
  1. 编写Mapper接口
public interface BookMapper {
    int addBook(Books book);
    int deleteBook(@Param("bookID") int id);
    int updateBook(Books book);
    Books queryByID(@Param("bookID") int id);
    List<Books> queryAllBooks();
}
  1. 编写Mapper.xml
<?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 namespace="com.lu.dao.BookMapper">
    <insert id="addBook" parameterType="books">
        insert into ssmbuild.books (bookName, bookCounts, detail)
        values (#{bookName}, #{bookCounts}, #{detail})
    </insert>
    <delete id="deleteBook" parameterType="int">
        delete from ssmbuild.books
               where bookID = #{bookID}
    </delete>
    <update id="updateBook" parameterType="books">
        update ssmbuild.books
        set bookName = #{bookName}, bookCounts = #{bookCounts}, detail = #{detail}
        where bookID = #{bookID}
    </update>
    <select id="queryByID" parameterType="int" resultType="books">
        select *
        from ssmbuild.books
        where bookID = #{bookID}
    </select>
    <select id="queryAllBooks" resultType="books">
        select *
        from ssmbuild.books
    </select>
</mapper>
  1. 编写Service接口
public interface BookService {
    int addBook(Books book);
    int deleteBook(int id);
    int updateBook(Books book);
    Books queryByID(int id);
    List<Books> queryAllBooks();
}
  1. 编写Service实现类
public class BookServiceImpl implements BookService{
    private BookMapper mapper;

    public void setMapper(BookMapper mapper) {
        this.mapper = mapper;
    }

    @Override
    public int addBook(Books book) {
        return mapper.addBook(book);
    }

    @Override
    public int deleteBook(int id) {
        return mapper.deleteBook(id);
    }

    @Override
    public int updateBook(Books book) {
        return mapper.updateBook(book);
    }

    @Override
    public Books queryByID(int id) {
        return mapper.queryByID(id);
    }

    @Override
    public List<Books> queryAllBooks() {
        return mapper.queryAllBooks();
    }
}

Spring

  1. 编写spring-dao.xml

Spring整合Dao层

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 1、关联数据库配置文件 -->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 2、连接池 -->
    <!--
    数据库连接池
       dbcp 半自动化操作 不能自动连接
       c3p0 自动化操作（自动的加载配置文件 并且设置到对象里面）
   	-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${driver}"/>
        <property name="jdbcUrl" value="${url}"/>
        <property name="user" value="${username}"/>
        <property name="password" value="${password}"/>

        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!-- 3、SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 配置MyBatis全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--
    4、配置扫描Dao接口包, 动态实现Dao接口注入到spring容器中
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描Dao接口包 -->
        <!-- 也就是注入*Mapper.java -->
        <property name="basePackage" value="com.lu.dao"/>
    </bean>
</beans>

  • Why Step 4?

    • 如果不这样配置，需要再编写一个Dao接口的实现类来完成Dao层的任务

    • public class UserMapperImpl extends SqlSessionDaoSupport implements UserMapper{
    @Override
    public List<User> selectUser() {
        UserMapper mapper = getSqlSession().getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

    • 在配置文件中也要注入这个类的bean，同时还要将sqlSessionFactory注入到这个bean中来获得Session

    • <bean id="userMapper" class="com.lu.dao.UserMapperImpl">
    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
  1. 编写spring-service.xml

Spring整合Service层

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 1、扫描service相关的bean -->
    <context:component-scan base-package="com.lu.service"/>

    <!-- 2、ServiceImpl注入到IOC容器 -->
    <bean id="bookServiceImpl" class="com.lu.service.BookServiceImpl">
        <property name="mapper" ref="bookMapper"/>
    </bean>

    <!-- 3、配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

SpringMVC

  1. 编写web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!-- 1、DispatcherServlet -->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!-- 一定要注意:我们这里加载的是总的配置文件 -->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 2、乱码过滤 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 3、Session过期 -->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>
</web-app>
  1. 编写spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 1、开启注解驱动 -->
    <mvc:annotation-driven/>

    <!-- 2、静态资源默认servlet配置 -->
    <mvc:default-servlet-handler/>

    <!-- 3、配置JSP显示的ViewResolver视图解析器 -->
    <!-- 说白了就是给名字然后拼接出JSP的完整路径 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 4、扫描web相关的bean -->
    <context:component-scan base-package="com.lu.controller"/>
</beans>

Integrate

  1. 编写applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>
    
</beans>

业务

BookController.java

@Controller
@RequestMapping("/book")
public class BookController {
    @Autowired
    @Qualifier("bookServiceImpl")
    private BookService bookService;

    @RequestMapping("/allBook")
    public String list(Model model) {
        List<Books> books = bookService.queryAllBooks();
        model.addAttribute("list", books);
        return "allBook";
    }

    @RequestMapping("/toAddPage")
    public String toAddPage() {
        return "addBook";
    }

    @RequestMapping("/addBook")
    public String addBook(Books book) {
        bookService.addBook(book);
        return "redirect:/book/allBook";
    }

    @RequestMapping("/toUpdatePage")
    public String toUpdatePage(Model model, int id) {
        Books book = bookService.queryByID(id);
        model.addAttribute("book", book);
        return "updateBook";
    }

    @RequestMapping("/updateBook")
    public String updateBook(Books book) {
        bookService.updateBook(book);
        return "redirect:/book/allBook";
    }

    @RequestMapping("/deleteBook/{bookID}")
    public String deleteBook(@PathVariable("bookID") int id) {
        bookService.deleteBook(id);
        return "redirect:/book/allBook";
    }

    @RequestMapping("/queryBookByName")
    public String queryBookByName(Model model, String queryBookName) {
        List<Books> list = new ArrayList<>();
        Books book = bookService.queryByName(queryBookName);
        if (book == null) {
            list = bookService.queryAllBooks();
            model.addAttribute("error", "未查找到相关书籍");
        } else {
            list.add(book);
        }
        model.addAttribute("list", list);
        return "allBook";
    }
}

allBook.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>书籍展示</title>

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

    <div class="container">
        <div class="row clearfix">
            <div class="col-md-12">
                <div class="page-header">
                    <h1>
                        <small>书籍列表 —— 显示所有书籍</small>
                    </h1>
                </div>
            </div>

            <div class="row">
                <div class="col-md-4 column">
                    <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddPage">新增书籍</a>
                    <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
                </div>
                <div class="col-md-8 column">
                    <form class="form-inline" action="${pageContext.request.contextPath}/book/queryBookByName" method="post" style="float: right">
                        <span style="color: red;font-weight: bold">${error}</span>
                        <input type="text" name="queryBookName" placeholder="请输入要查询的书籍名称" class="form-control">
                        <input type="submit" value="查询" class="btn btn-primary">
                    </form>
                </div>
            </div>
        </div>

        <div class="row-clearfix">
            <div class="col-md-12">
                <table class="table table-hover table-striped">
                    <thead>
                        <tr>
                            <th>书籍编号</th>
                            <th>书籍名称</th>
                            <th>书籍数量</th>
                            <th>书籍详情</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                    <tbody>
                        <c:forEach var="book" items="${list}">
                            <tr>
                                <td>${book.bookID}</td>
                                <td>${book.bookName}</td>
                                <td>${book.bookCounts}</td>
                                <td>${book.detail}</td>
                                <td>
                                    <a href="${pageContext.request.contextPath}/book/toUpdatePage?id=${book.bookID}">修改</a>
                                    &nbsp; | &nbsp;
                                    <a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
                                </td>
                            </tr>
                        </c:forEach>
                    </tbody>
                </table>
            </div>
        </div>
    </div>

</body>
</html>

addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>新增书籍</title>

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12">
            <div class="page-header">
                <h1>
                    <small>新增书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/book/addBook">
        <div class="form-group">
            <label for="bkname">书籍名称：</label>
            <input type="text" name="bookName" class="form-control" id="bkname" required>
        </div>
        <div class="form-group">
            <label for="bknum">书籍数量：</label>
            <input type="text" name="bookCounts" class="form-control" id="bknum" required>
        </div>
        <div class="form-group">
            <label for="bkinfo">书籍描述：</label>
            <input type="text" name="detail" class="form-control" id="bkinfo">
        </div>
        <div class="form-group">
            <input type="submit" class="form-control" value="提交">
        </div>
    </form>
</div>
</body>
</html>

updateBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</title>

    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    <div class="container">
        <div class="row clearfix">
            <div class="col-md-12">
                <div class="page-header">
                    <h1>
                        <small>修改书籍</small>
                    </h1>
                </div>
            </div>
        </div>

        <form action="${pageContext.request.contextPath}/book/updateBook">
            <div class="form-group">
                <label for="bkid">书籍编号：</label>
                <input type="text" name="bookID" class="form-control" id="bkid" readonly value="${book.bookID}">
            </div>
            <div class="form-group">
                <label for="bkname">书籍名称：</label>
                <input type="text" name="bookName" class="form-control" id="bkname" required value="${book.bookName}">
            </div>
            <div class="form-group">
                <label for="bknum">书籍数量：</label>
                <input type="text" name="bookCounts" class="form-control" id="bknum" required value="${book.bookCounts}">
            </div>
            <div class="form-group">
                <label for="bkinfo">书籍描述：</label>
                <input type="text" name="detail" class="form-control" id="bkinfo" value="${book.detail}">
            </div>
            <div class="form-group">
                <input type="submit" class="form-control" value="提交">
            </div>
        </form>
    </div>
</body>
</html>
posted @   James-Allen  阅读(9)  评论(0)  编辑  收藏  举报
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