SSM框架整合(Spring、SpringMVC、Mybatis)

#毫无疑问我们肯定是使用Spring去整合SpringMVC和Mybatis，在整合过程中我们首先要让各自的模块实现，然后再去使用Spring整合；比如我先实现Mybatis框架的配置，然后再通过测试看操作数据库能否成功，如果测试成功了我们再去使用Spring整合Mybatis；当然SpringMVC也一样，先编写SpringMVC所需要的一些配置项，测试web层能够实现之后再去使用Spring整合SpringMVC；

1.导入坐标

 <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>compile</scope>
    </dependency>
<!--    与spring相关-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.8.13</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.0.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>

<!--    servlet和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>

<!--    与mybatis相关-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.19</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
<!--EL标签库-->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.12</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.12</version>
    </dependency>
  </dependencies>

2.创建数据表

3.编写Account实体类

public class Account implements Serializable {

    private int id;
    private String name;
    private double money;

    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 double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

3.配置jdbc.properties资源文件

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.username=root
jdbc.password=hao20001010

4.Spring整合Myabits(编写Spring核心配置文件applicationContext.xml)
将Myabtis的相关操作交给spring管理（不用再配置Mybaits的核心文件SqlMapConfig.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: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/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

<!--    开启注解扫描,只希望处理service和dao，controller不需要我们处理-->
    <context:component-scan base-package="com.hao">
<!--        配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

<!--    spring整合mybatis框架-->
<!--    加载jdbc.properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
<!--    配置连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
<!--    配置工厂对象SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>
<!--    接口所在的包-->
    <bean id="scannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hao.dao"/>
    </bean>

    <!--    配置spring框架的声明式事务管理-->
<!--    配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
<!--    配置事务通知-->
    <tx:advice id="tx" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
<!--    配置AOP增强-->
    <aop:config>
        <aop:advisor advice-ref="tx" pointcut="execution(* com.hao.service.impl.*ServiceImpl.*(..))"/>
    </aop:config>
</beans>

5.配置SpringMVC的核心文件（spring-mvc.xml)

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

<!--    开启注解扫描-->
   <context:component-scan base-package="com.hao">
       <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
   </context:component-scan>

<!--    配置视图解析器-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
<!--    过滤静态资源-->
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/css/**" location="/images"/>
    <mvc:resources mapping="/js/**" location="/js/"/>
<!--    开启springmvc注解的支持-->
    <mvc:annotation-driven/>
</beans>

6.有关web.xml的配置（SpringMVC的前端控制器，加载spring核心配置文件，编码过滤等）

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<!--  配置前端控制器-->
<web-app>
  <display-name>Archetype Created Web Application</display-name>

<!--  配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--    加载spring-mvc配置文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.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>

<!--  配置编码过滤器-->
  <filter>
    <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

<!--  配置Spring的监听器,默认只加载web-inf下的applicationContext.xml-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
<!--  让监听器找该位置下的applicationContext.xml文件，而不是默认的-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

</web-app>

Spring与SpringMVC是天生无缝集成的

7.编写Dao层

@Repository
public interface AccountDao {
    /**
     * 查询所有账户信息
     * @return list
     */
    @Select("select * from account")
    public List<Account> findAll();

    /**
     * 保存账户信息
     */
    @Insert("insert into account (name,money) values(#{name},#{money})")
    public void saveAccount(Account account);
}

8.编写Service层

public interface AccountService {
        /**
         * 查询所有账户信息
         * @return list
         */
        public List<Account> findAll();

        /**
         * 保存账户信息
         */
        public void saveAccount(Account account);
}

@Service
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountDao accountDao;

    @Override
    public List<Account> findAll() {
        System.out.println("业务层，查询所有的账户。。");
        List<Account> list = accountDao.findAll();
        return list;
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层，保存账户。。");
        accountDao.saveAccount(account);
    }
}

9.编写Controller层

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService service;

    @RequestMapping("/findAll")
    public String findAll(Model model){
        System.out.println("表现层，查询所有用户");
        List<Account> list = service.findAll();
        model.addAttribute("list",list);
        return "list";
    }
    //自动将前端数据封装到Account类里面
    @RequestMapping("/save")
    public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
        service.saveAccount(account);
        response.sendRedirect(request.getContextPath()+"/account/findAll");
        return;
    }
}

10.编写前端页面

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
    <a href="account/findAll">测试</a>
    <form action="/account/save" method="post">
        姓名：<input type="text" name="name"/><br>
        金额：<input type="text" name="money"/><br>
        <input type="submit" value="保存">
    </form>
</body>
</html>

list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h3>查询了所有的用户信息</h3>
    <c:forEach items="${list}" var="account">
        ${account.name}
        ${account.money}
    </c:forEach>
</body>
</html>

11.测试即可