SSM三大框架整合的学习心得

SSM三大框架整合的学习心得

一、maven中jar的导入

<properties>
  <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
  <maven.compiler.source>1.8maven.compiler.source>
  <maven.compiler.target>1.8maven.compiler.target>
  
    
  <spring.version>5.0.2.RELEASEspring.version>
  <slf4j.version>1.6.6slf4j.version>
  <log4j.version>1.2.12log4j.version>
  <shiro.version>1.2.3shiro.version>
  <mysql.version>5.1.6mysql.version>
  <mybatis.version>3.4.5mybatis.version>
properties>

<dependencies>
  <dependency>
    <groupId>org.aspectjgroupId>
    <artifactId>aspectjweaverartifactId>
    <version>1.6.8version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-aopartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-contextartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-webartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-webmvcartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-testartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-txartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>org.springframeworkgroupId>
    <artifactId>spring-jdbcartifactId>
    <version>${spring.version}version>
  dependency>

  <dependency>
    <groupId>junitgroupId>
    <artifactId>junitartifactId>
    <version>4.12version>
    <scope>compilescope>
  dependency>

  <dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <version>${mysql.version}version>
  dependency>

  <dependency>
    <groupId>javax.servletgroupId>
    <artifactId>servlet-apiartifactId>
    <version>2.5version>
    <scope>providedscope>
  dependency>

  <dependency>
    <groupId>javax.servlet.jspgroupId>
    <artifactId>jsp-apiartifactId>
    <version>2.0version>
    <scope>providedscope>
  dependency>

  <dependency>
    <groupId>jstlgroupId>
    <artifactId>jstlartifactId>
    <version>1.2version>
  dependency>

  
  <dependency>
    <groupId>log4jgroupId>
    <artifactId>log4jartifactId>
    <version>${log4j.version}version>
  dependency>

  <dependency>
    <groupId>org.slf4jgroupId>
    <artifactId>slf4j-apiartifactId>
    <version>${slf4j.version}version>
  dependency>

  <dependency>
    <groupId>org.slf4jgroupId>
    <artifactId>slf4j-log4j12artifactId>
    <version>${slf4j.version}version>
  dependency>

  
  <dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatisartifactId>
    <version>${mybatis.version}version>
  dependency>

  <dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatis-springartifactId>
    <version>1.3.0version>
  dependency>

  <dependency>
    <groupId>c3p0groupId>
    <artifactId>c3p0artifactId>
    <version>0.9.1.2version>
    <type>jartype>
    <scope>compilescope>
  dependency>

  <dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatisartifactId>
    <version>3.4.5version>
  dependency>



dependencies>

二、SSM框架的整合

1、Spring框架的配置

编写Spring的xml文件：

​

<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">
    
    <context:component-scan base-package="cn.ithm">
        
        <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

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

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

<servlet>
  <servlet-name>dispatcherServletservlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    
  
  <init-param>
    <param-name>contextConfigLocationparam-name>
    <param-value>classpath:springmvc.xmlparam-value>
  init-param>
    
    
  <load-on-startup>1load-on-startup>
    
servlet>
<servlet-mapping>
  <servlet-name>dispatcherServletservlet-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

<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">
    
    
    <context:component-scan base-package="cn.ithm">
        
        
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller">context:include-filter>
    context:component-scan>
    
    
    <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>
    
    
    <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：

<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>

<context-param>
  <param-name>contextConfigLocationparam-name>
  <param-value>classpath:applicationContext.xmlparam-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

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：

<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>


<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    
    
    <property name="dataSource" ref="dataSource">property>
bean>


<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="cn.ithm.dao">property>
bean>


    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    bean>

    
<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:config>
    
    
<aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.ithm.service.impl.*ServiceImpl.*(..))"/>
    
aop:config>

```

至此Mybatis也整合进Spring进去了