SSM整合

整合思路

　　Spring的IOC特性，所以应该是将别的框架整合到Spring中

 　   前置

　　准备pom文件（可以分步导入，这里是一次性导入）

　　

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.company</groupId>
  <artifactId>ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>5.0.2.RELEASE</spring.version>
    <mysql.version>5.1.6</mysql.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

    <!--这一个就将spring依赖的核心jar包导得差不多了-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--spring整合junit测试-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--spring管理数据库相关，传递依赖spring-tx-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--解析切入AOP表达式等-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.2</version>
    </dependency>


    <!--标准标签库-->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!--jsp-api会依赖导入servlet-api-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
    </dependency>
      <!-- log start -->
      <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>${log4j.version}</version>
      </dependency>

      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-api</artifactId>
          <version>${slf4j.version}</version>
      </dependency>

      <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-log4j12</artifactId>
          <version>${slf4j.version}</version>
      </dependency>
      <!-- log end -->

      <!--MyBatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
      <!--spring整合MyBatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!--连接池-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.9</version>
    </dependency>
    <!--数据库连接驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>ssm</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

　　

　　jdbcConfig.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.username=root
jdbc.password=yourPassword
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8

第一步：

配置Spring框架

applicationContext.xml

<!--配置spring注解扫描-->
<context:component-scan base-package="com.company">
    <!--Controller的部分交给SpringMVC去扫描-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

导好spring的包然后在applicationContext.xml中配置注解扫描，就算是配置好Spring框架了，动手测试一下，写个Service，配上@Service("accountService")注解，findAll方法打印一句话验证有运行就可以了

@Test
public void testService(){
    ApplicationContext ac=new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    AccountService accountService = ac.getBean("accountService", AccountService.class);
    accountService.findAll();

}

第二步：

配置SpringMVC框架

导入spring-mvcweb包

web.xml

　<!--配置springMVC的前端控制器-->

<servlet>
  <servlet-name>dispatcherServlet</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springMvc.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，解决中文乱码问题-->
<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>

　　

springMvc.xml

　　

<!--springMvc的注解扫描,此处有一个巨坑，use-default-filters默认值为true,会扫描所有注入的注解
    如果只配置<context:include-filter>则还是表示啥都扫描，会导致事务管理器被SpringMVC管理，而不是Spring
    SpringMVC的容器是Spring的子容器，子容器可以访问父容器，父容器不可以访问子容器，有点类似于继承
    从软件层面上来说，Spring MVC是展示层可以调用业务层，业务层不能调用展示层。
    参考博客：https://www.cnblogs.com/Esummer/p/11791468.html
    结果就导致事务控制失败。
    <context:include-filter>和use-default-filters="false"配合使用才能达到“只扫描。。。”的目的
    -->
<context:component-scan base-package="com.company" use-default-filters="false">
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
</context:component-scan>

<!--配置视图解析器-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>

<!--配置放行静态资源,可配置多个-->
<mvc:resources mapping="/js/**" location="/js/"></mvc:resources>

<!--开启springMVC注解的支持-->
<mvc:annotation-driven/>

 这时候就可以写一个Controller类打上Controller注解，并配置好@RequestMapping访问路径，就可以配置tomcat访问一下试试，看SpringMVC是否工作正常

第三步：

整合Spring和SpringMVC框架

web.xml添加内容，我的applicationContext.xml在resources目录下

<!--整合Spring，使用ServletContextListener,此时只会加载/WEB-INF/applicationContext.xml文件-->
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--Spring配置文件在其他地方需要配置-->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>

整合完毕，此时可以在Controller代码里注入Service对象，并调用Service中的方法。启动Tomcat访问Controller中的方法，看Service中的方法是否也被调用了。

第四步：

配置MyBatis框架

确定MyBatis的包导入后

SqlMapConfig.xml,当和Spring框架整合完毕，这个配置文件就不再需要了

<?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>
    <!--加载jdbc配置文件-->
    <properties resource="jdbcConfig.properties"></properties>
    <!--为实体类起别名-->
    <typeAliases>
        <package name="com.company.entity"></package>
    </typeAliases>
    <!--配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}"></property>
                <property name="username" value="${jdbc.username}"></property>
                <property name="password" value="${jdbc.password}"></property>
            </dataSource>
        </environment>
    </environments>
    <!--设置接口扫描包-->
    <mappers>
        <package name="com.company.dao"></package>
    </mappers>
</configuration>

我习惯XML配置映射的方式写Sql，也可以用注解的方式。在resources文件夹创建与Dao接口所在包相同结构的文件夹，并创建同名的xml文件

com/company/dao/AccountDao.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.company.dao.AccountDao">
    <select id="findAll" resultType="account">
        SELECT * FROM account
    </select>
    <update id="save" parameterType="account">
        INSERT INTO account (name,money) VALUES (#{name},#{money})
    </update>
</mapper>

测试一把

　　

    @Test
    public void testMyBatis() throws IOException {
        InputStream in = Resources.getResourceAsStream("sqlMapConfig.xml");
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        SqlSession sqlSession = factory.openSession();
        AccountDao accountDao = sqlSession.getMapper(AccountDao.class);
//        List<Account> list = accountDao.findAll();
//        for (Account account : list) {
//            System.out.println(account);
//        }
        Account account=new Account();
        account.setName("ddd");
        account.setMoney(666d);
        accountDao.save(account);
　　　　　//注意此处需要手动commit
        sqlSession.commit();
        in.close();
        sqlSession.close();
    }

　　

第五步：

Spring整合MyBatis框架

确认mybatis-spring包有正常导入

applicationContext.xml添加内容，整合部分

　　

<!--引入jdbc配置文件-->
<context:property-placeholder location="classpath:jdbcConfig.properties"/>

<!--整合MyBaties↓-->
<!--1.准备连接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="driverClassName" value="${jdbc.driver}"></property>
    <property name="url" value="${jdbc.url}"></property>
    <property name="username" value="${jdbc.username}"></property>
    <property name="password" value="${jdbc.password}"></property>
</bean>
<!--2.配置MyBatis的SQLSession工厂-->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <!--配置实体类别名，多个包在value值中使用“;”进行分隔-->
    <property name="typeAliasesPackage" value="com.company.entity"></property>
</bean>
<!--3.配置myBatis扫描的包-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.company.dao"></property>
</bean>
<!--整合MyBaties↑-->

applicationContext.xml添加内容，事务管理部分

　　

<!--事务控制↓-->
    <!--事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--切入点配置-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
　　　　　　　　<!--关于事务属性配置可以参考https://www.cnblogs.com/zou-rong/p/12047768.html-->
            <tx:method name="*" propagation="REQUIRED" read-only="false"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
        </tx:attributes>
    </tx:advice>
    <!--配置事务管理器和切入点增强方法-->
    <aop:config>
        <aop:pointcut id="pt1" expression="execution(* com.company.service.impl.*.*(..))"></aop:pointcut>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"></aop:advisor>
    </aop:config>
<!--事务控制↑-->

此时可以在Dao接口上加上@Repository注解，然后在Service中调用dao的方法，在index.jsp中写一个表单提交，看看是否能保存成功，再在保存后添加一个异常int i=10/0；重新测试能否回滚。

都没有问题就可以删除SqlMapConfig.xml文件了

到此SSM整合完毕。----------------------------------------------------------------------------------------------------------------------

下面贴出完整的整合配置文件

web.xml

　　

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

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--整合Spring，使用ServletContextListener,此时只会加载/WEB-INF/applicationContext.xml文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--Spring配置文件在其他地方需要配置-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!--配置springMVC的前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springMvc.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，解决中文乱码问题-->
  <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>
</web-app>

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"
       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 http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--引入jdbc配置文件-->
    <context:property-placeholder location="classpath:jdbcConfig.properties"/>
    <!--配置spring注解扫描-->
    <context:component-scan base-package="com.company">
        <!--Controller的部分交给SpringMVC去扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!--整合MyBaties↓-->
    <!--1.准备连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!--2.配置MyBatis的SQLSession工厂-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!--配置实体类别名，多个包在value值中使用“;”进行分隔-->
        <property name="typeAliasesPackage" value="com.company.entity"></property>
    </bean>
    <!--3.配置myBatis扫描的包-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.company.dao"></property>
    </bean>
    <!--整合MyBaties↑-->

    <!--事务控制↓-->
        <!--事务管理器-->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!--切入点配置-->
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="*" propagation="REQUIRED" read-only="false"/>
                <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
            </tx:attributes>
        </tx:advice>
        <!--配置事务管理器和切入点增强方法-->
        <aop:config>
            <aop:pointcut id="pt1" expression="execution(* com.company.service.impl.*.*(..))"></aop:pointcut>
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"></aop:advisor>
        </aop:config>
    <!--事务控制↑-->
</beans>

springMvc.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">

<!--springMvc的注解扫描,此处有一个巨坑，use-default-filters默认值为true,会扫描所有注入的注解
    如果只配置<context:include-filter>则还是表示啥都扫描，会导致事务管理器被SpringMVC管理，而不是Spring
    SpringMVC的容器是Spring的子容器，子容器可以访问父容器，父容器不可以访问子容器，有点类似于继承
    从软件层面上来说，Spring MVC是展示层可以调用业务层，业务层不能调用展示层。
    参考博客：https://www.cnblogs.com/Esummer/p/11791468.html
    结果就导致事务控制失败。
    <context:include-filter>和use-default-filters="false"配合使用才能达到“只扫描。。。”的目的
    -->

    <context:component-scan base-package="com.company" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
    </context:component-scan>

    <!--配置视图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--配置放行静态资源-->
    <mvc:resources mapping="/js/**" location="/js/"></mvc:resources>

    <!--开启springMVC注解的支持-->
    <mvc:annotation-driven/>
</beans>

pom.xml和jdbcConfig.properties都在最开始给出，此处不再赘述，不足之处还请各位看官不吝赐教。