【SpringMVC】六、SSM整合开发【狂神篇】

1、运行效果

2、环境要求

环境：

• IDEA
• MySQL 5.7.19
• Tomcat 9
• Maven 3.6

要求：

• 需要熟练掌握MySQL数据库，Spring，JavaWeb及MyBatis知识，简单的前端知识；

3、数据库

创建一个存放书籍数据的数据库表

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');

4、基本环境搭建

1）新建一Maven项目

ssmbuild ， 添加web的支持

2）导入jar包

<dependencies>
    <!--Junit-->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13.2</version>
        <scope>test</scope>
    </dependency>
    <!--数据库驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.25</version>
    </dependency>
    <!-- 数据库连接池 -->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.5.5</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.jsp.jstl</groupId>
        <artifactId>jstl-api</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>taglibs</groupId>
        <artifactId>standard</artifactId>
        <version>1.1.2</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>2.0.6</version>
    </dependency>
    <!--Spring-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.8</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.8</version>
    </dependency>
    <!--AOP-->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.6</version>
    </dependency>
    <!--lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.20</version>
    </dependency>

</dependencies>

3）静态资源过滤

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.properties</include>
                <include>**/*.xml</include>
            </includes>
            <!--false：表示不启用过滤器-->
            <filtering>false</filtering>
        </resource>
    </resources>
</build>

4）基本结构和配置框架

• 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>

</configuration>

• 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">

</beans>

5、Mybatis层

1）db.properties

jdbc.driver = com.mysql.cj.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
jdbc.username = root
jdbc.password = 123456

2）IDEA关联数据库

3）配置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>
    <!--设置-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
    <!--别名-->
    <typeAliases>
        <package name="com.tuwer.pojo"/>
    </typeAliases>
    <!--映射文件-->
    <mappers>
        <package name="com.tuwer.dao"/>
    </mappers>
</configuration>

4）实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
    private int bookID;
    private String bookName;
    private int bookCounts;
    private String detail;
}

5）Dao接口

public interface BookMapper {
    /**
     * 添加
     * @param books
     * @return
     */
    int addBook(Books books);

    /**
     * 删除
     * @param id
     * @return
     */
    int deleteBookById(@Param("bookID") int id);

    /**
     * 更新
     * @param books
     * @return
     */
    int updateBook(Books books);

    /**
     * 查找
     * @param id
     * @return
     */
    Books queryBookById(@Param("bookID") int id);

    /**
     * 查找全部
     * @return
     */
    List<Books> queryAllBook();

    /**
     * 根据书名查询
     * @param name
     * @return
     */
    List<Books> queryBookByName(@Param("bookName") String name);
}

6）接口映射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.tuwer.dao.BookMapper">
    <insert id="addBook" parameterType="books">
            insert into books(bookName,bookCounts,detail)
            values (#{bookName},#{bookCounts},#{detail});
    </insert>

    <delete id="deleteBookById" parameterType="int">
        delete
        from books
        where bookID = #{bookID};
    </delete>
    
    <update id="updateBook" parameterType="books">
        update books
        set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
        where bookID = #{bookID};
    </update>

    <select id="queryBookById" parameterType="int" resultType="books">
        select *
        from books where bookID = #{bookID};
    </select>

    <select id="queryAllBook" resultType="books">
        select * from books;
    </select>

    <select id="queryBookByName" parameterType="string" resultType="books">
        select *
        from books
        where bookName like concat('%',#{bookName},'%');
    </select>

</mapper>

模糊查询：like concat('%',#{bookName},'%')

7）Service层接口及实现类

• 接口

public interface BookService {
    /**
     * 添加
     * @param books
     * @return
     */
    int addBook(Books books);

    /**
     * 删除
     * @param id
     * @return
     */
    int deleteBookById(int id);

    /**
     * 更新
     * @param books
     * @return
     */
    int updateBook(Books books);

    /**
     * 查找
     * @param id
     * @return
     */
    Books queryBookById(int id);

    /**
     * 查找全部
     * @return
     */
    List<Books> queryAllBook();

    /**
     * 根据书名查询
     * @param name
     * @return
     */
    List<Books> queryBookByName(String name);
}

• 实现类

@Service
public class BookServiceImpl implements BookService{
    /**
     * 调用dao层的操作，设置一个set接口，方便Spring管理
     */
    private BookMapper bookMapper;

    @Autowired
    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    @Override
    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

    @Override
    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Books books) {
        return bookMapper.updateBook(books);
    }

    @Override
    public Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

    @Override
    public List<Books> queryAllBook() {
        return bookMapper.queryAllBook();
    }

    @Override
    public List<Books> queryBookByName(String name) {
        return bookMapper.queryBookByName(name);
    }
}

6、Spring层

1）整合MyBatis

使用c3p0连接池

• spring-dao.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"
       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">
    <!-- 配置整合mybatis -->
    <!-- 1.关联数据库文件 -->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 2.数据库连接池 -->
    <!--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">
        <!-- 配置连接池属性 -->
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>

        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="200"/>
        <property name="minPoolSize" value="5"/>
        <!-- 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.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!--
        配置实体类别名
        替换了mybatis-config.xml中
        <typeAliases><package name="com.ajun.pojo"/></typeAliases>
        节点-->
        <!--<property name="typeAliasesPackage" value="com.tuwer.pojo"/>-->
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--<property name="mapperLocations" value="classpath:com/tuwer/dao/*.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
    配置完之后，别处可以直接引用；如：ref="bookMapper"
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--
        注入sqlSessionFactory
        通过扫描去查找；用value，不是ref；底层是反射机制
        -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="com.tuwer.dao"/>
    </bean>
</beans>

2）整合service层

• spring-service.xml

声明式事务

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       https://www.springframework.org/schema/aop/spring-aop.xsd">
    <!-- 扫描service相关的bean -->
    <context:component-scan base-package="com.tuwer.service"/>

    <!--省略：使用注解，自动装配-->
    <!--BookServiceImpl注入到IOC容器中-->
<!--    <bean id="bookService" class="com.tuwer.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>-->

    <!--声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--AOP事务-->
    <!--配置事务通知，即方法的增强-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!--需要配置事务的方法-->
        <!--事务的传播特性-->
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <!--配置事务切入-->
    <aop:config>
        <aop:pointcut id="txPointCut" expression="execution(* com.tuwer.service.*Impl.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
    </aop:config>

</beans>

• BookServiceImpl.java 添加注解

@Service、@Autowired

@Service
public class BookServiceImpl implements BookService{
    /**
     * 调用dao层的操作，设置一个set接口，方便Spring管理
     */
    private BookMapper bookMapper;

    @Autowired
    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }
}    

• applicationContext.xml 添加注解支持等

<!--1、注解驱动（全局）-->
<mvc:annotation-driven/>
<!--2、静态资源过滤（全局）-->
<mvc:default-servlet-handler/>

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

7、SpringMVC层

1）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">
    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--总的配置文件-->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <!--启动级别-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--乱码过滤器-->
    <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>
</web-app>

2）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
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--1、注解驱动-->
<!--    <mvc:annotation-driven/>-->
    <!--2、静态资源过滤-->
<!--    <mvc:default-servlet-handler/>-->
    
    <!--3、扫描包-->
    <context:component-scan base-package="com.tuwer.controller"/>
    <!--4、视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

3）applicationContext.xml 引入xml

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

4）Controller 及视图层

（1）查询全部书籍

• 方法

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

    @Autowired
    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }

    /**
     * 查询全部页
     * @param model
     * @return
     */
    @RequestMapping("/getAll")
    public String getAllBook(Model model){
        List<Books> list = bookService.queryAllBook();
        model.addAttribute("list", list);
        return "allBook";
    }
}    

• 首页index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>首页</title>
  </head>
  <body>
  <a href="${pageContext.request.contextPath}/book/getAll">进入书籍展示</a>
  </body>
</html>

• 书籍列表 allbook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>书籍展示</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <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 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表 —— 显示所有书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
        </div>
        <div class="col-lg-3 pull-right">
            <form action="${pageContext.request.contextPath}/book/queryBook" method="post">
                <div class="input-group">
                    <input type="text" class="form-control" name="bookName" placeholder="请输入要查询的书名">
                    <span class="input-group-btn">
                        <input type="submit" class="btn btn-default" value="查询"/>
                    </span>
                </div>
            </form>
        </div>

        <div class="row clearfix">
            <div class="col-md-12 column">
                <table class="table table-hover table-striped">
                    <thead>
                    <tr>
                        <th>书籍编号</th>
                        <th>书籍名字</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.getBookID()}</td>
                            <td>${book.getBookName()}</td>
                            <td>${book.getBookCounts()}</td>
                            <td>${book.getDetail()}</td>
                            <td>
                                <a href="${pageContext.request.contextPath}/book/toUpdateBook/${book.getBookID()}">更改</a> |
                                <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                            </td>
                        </tr>
                    </c:forEach>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>
</body>
</html>

（2）添加书籍

• 方法

    /**
     * 进入添加页
     * @return
     */
    @RequestMapping("/toAddBook")
    public String toAddBook(){
        return "addBook";
    }

    /**
     * 添加
     * @param books
     * @return
     */
    @RequestMapping(value = "/addBook",method = RequestMethod.POST)
    public String addBook(Books books){
        bookService.addBook(books);
        return "redirect:/book/getAll";
    }

• addBook.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加书籍</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 column">
      <div class="page-header">
        <h1>
          <small>新增书籍</small>
        </h1>
      </div>
    </div>
  </div>
  <form action="${pageContext.request.contextPath}/book/addBook" method="post">
    <div class="form-group">
      <label>书籍名称：</label>
      <input type="text" name="bookName" class="form-control"/>
    </div>
    <div class="form-group">
      <label>书籍数量：</label>
      <input type="text" name="bookCounts" class="form-control"/>
    </div>
    <div class="form-group">
      <label>书籍详情：</label>
      <input type="text" name="detail" class="form-control"/>
    </div>
    <div class="form-group">
      <input type="submit" value="添加" class="form-control"/>
    </div>

  </form>
</div>
</body>
</html>

（3）修改书籍

• 方法

    /**
     * 进入修改页面
     * @param id
     * @param model
     * @return
     */
    @RequestMapping("/toUpdateBook/{bookID}")
    public String toUpdateBook(@PathVariable("bookID") int id,Model model){
        Books books = bookService.queryBookById(id);
        model.addAttribute("books", books);
        return "updateBook";
    }

    /**
     * 修改
     * @param books
     * @return
     */
    @RequestMapping("/updateBook")
    public String updateBook(Books books){
        bookService.updateBook(books);
        return "redirect:/book/getAll";
    }

• 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 column">
      <div class="page-header">
        <h1>
          <small>修改书籍</small>
        </h1>
      </div>
    </div>
  </div>
  <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
    <input type="hidden" name="bookID" value="${books.bookID}">
    <div class="form-group">
      <label>书籍名称：</label>
      <input type="text" name="bookName" value="${books.bookName}" class="form-control"/>
    </div>
    <div class="form-group">
      <label>书籍数量：</label>
      <input type="text" name="bookCounts" value="${books.bookCounts}" class="form-control"/>
    </div>
    <div class="form-group">
      <label>书籍详情：</label>
      <input type="text" name="detail" value="${books.detail}" class="form-control"/>
    </div>
    <div class="form-group">
      <input type="submit" value="修改" class="form-control"/>
    </div>

  </form>
</div>
</body>
</html>

（4）删除书籍

• 方法

    /**
     * 删除
     * @param id
     * @return
     */
    @RequestMapping("/del/{bookID}")
    public String delBook(@PathVariable("bookID") int id){
        bookService.deleteBookById(id);
        return "redirect:/book/getAll";
    }

（5）查询书籍

• 方法

    /**
     * 查询
     * @param bookName
     * @param model
     * @return
     */
    @RequestMapping("/queryBook")
    public String queryBook(String bookName,Model model){
        List<Books> list = bookService.queryBookByName(bookName);
        model.addAttribute("list", list);
        return "allBook";
    }