SSM三大框架整合的学习心得

一、maven中jar的导入

<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>
  <!--下面这套jar包版本经测试没有冲突可用-->
    
  <spring.version>5.0.2.RELEASE</spring.version>
  <slf4j.version>1.6.6</slf4j.version>
  <log4j.version>1.2.12</log4j.version>
  <shiro.version>1.2.3</shiro.version>
  <mysql.version>5.1.6</mysql.version>
  <mybatis.version>3.4.5</mybatis.version>
</properties>

<dependencies>
  <dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.6.8</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
  </dependency>

  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>compile</scope>
  </dependency>

  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
  </dependency>

  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
  </dependency>

  <dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.0</version>
    <scope>provided</scope>
  </dependency>

  <dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</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 -->
  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>${mybatis.version}</version>
  </dependency>

  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.0</version>
  </dependency>

  <dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.2</version>
    <type>jar</type>
    <scope>compile</scope>
  </dependency>

  <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.5</version>
  </dependency>



</dependencies>

二、SSM框架的整合

1、Spring框架的配置

编写Spring的xml文件：

<?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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--开启注解的扫描-->
    <context:component-scan base-package="cn.ithm">
        <!--对不扫描的注解进行配置-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
    </context:component-scan>
</beans>

为有关类加上注解，将类放入IOC进去，如下图

$C:\Users\86151\AppData\Roaming\Typora\typora-user-images\1594974785182.png$
后面要用到该类就可以直接通过加载Spring的xml配置来获取应用环境（ApplicationContext），有了应用环境就可以通过使用应用环境里面的类方法，通过所需类的名字获取到该类的对象如下图

在这里插入图片描述

至此spring框架就构建完成。

2、整合SpringMVC框架

整合之前需要确保SpringMVC框架可以再web工程上独立运行

首先配置web.xml文件 推荐使用web3.0的约束

<!-- 配置spring mvc的核心控制器 -->
<servlet>
  <servlet-name>dispatcherServlet</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    
  <!--初始化参数，加载SpirngMVC的配置文件-->
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springmvc.xml</param-value>
  </init-param>
    
    <!-- 配置servlet的对象的创建时间点：应用加载时创建。取值只能是非0正整数，表示启动顺序 -->
  <load-on-startup>1</load-on-startup>
    
</servlet>
<servlet-mapping>
  <servlet-name>dispatcherServlet</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

配完web.xml后需要再配上SpringMVC框架自己的配置文件

<!--首先引入约束-->
<?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">
    
    <!-- 配置创建spring容器要扫描的包 -->
    <context:component-scan base-package="cn.ithm">
        
        <!-- 制定扫包规则 ,只扫描使用@Controller注解的JAVA类 -->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
    </context:component-scan>
    
    <!--配置的视图解析器-->
    <bean id="InternalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    
    <!--开启SpringMVC注解支持-->
    <mvc:annotation-driven/>
    
</beans>

为了让服务器启动后可以加载到Spring的配置文件需要再web.xml上配置一个监听器用来启动Spring的xml文件如：

<!--配置spring的监听器，默认只加载WEB-INF下的applicationContext.xml配置文件-->
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 手动指定spring配置文件位置 -->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>

至此SpringMVC也就整合进了Spring进去了

3、整合Mybatis框架

还是和SpringMVc一样再整合进Spring之前要搭建好Mybatis

如图我直接使用注解的方式快速建立映射关系，接下来就是编写Mybatis的配置文件了

在这里插入图片描述

框架搭建好了

整合：把Mybaits的配置文件中内容配置到spring配置文件中如下：

<!--SpringMVC整合Mybatis框架-->

<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
    <property name="user" value="root"/>
    <property name="password" value="1234"/>
</bean>

<!--配置SqlSessionFactory工厂-->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    
    <!-- 数据库连接池 -->
    <property name="dataSource" ref="dataSource"></property>
</bean>

<!-- 配置Mapper扫描器 -->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="cn.ithm.dao"></property>
</bean>

<!--配置Spring框架声明式事务管理-->
    <!--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="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
    <tx:method name="find" read-only="true"/>
    <tx:method name="*" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>

        <!--Aop增强-->
<aop:config>
    
    <!-- 配置切入点表达式 -->
<aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.ithm.service.impl.*ServiceImpl.*(..))"/>
    
</aop:config>

在这里插入图片描述

<property name="dataSource" ref="dataSource"></property>

```

至此Mybatis也整合进Spring进去了