SSM简洁版本的三大框架整合:Spring+SpringMVC+Mybatis

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title	date	tags
【SSM】Spring+SpringMVC+Mybatis整合	2020-02-02 08:42:09 -0800	ssm

Spring+SpringMVC+Mybatis三大框架整合

1.创建数据库和表结构（以个人账户为例）

create database ssm; 
create table account(  
	id int primary key auto_increment,
    name varchar(100),
    money double(7,2)
);

整合原理和目录结构图

2.创建maven项目，导入依赖坐标并编写实体类Account、业务层接口AccountService和持久层接口AccountDao

<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>
    <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>
    <!-- spring -->
    <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-context-support</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-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>	
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>	
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</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-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>	
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>	
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>complie</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>
 </dependencies>

3.搭建Spring环境

3.1 编写Spring配置文件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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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/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
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">
<!--开启注解扫描,只处理Service and dao ,controller不需要spring来处理-->
<context:component-scan base-package="cn.itcast">
    <!--配置哪些注解不扫描-->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>

3.2 使用注解配置业务层和持久层

主要是用作测试Spring环境是否搭建成功

4.搭建SpringMVC环境

4.1 在web.xml文件中配置核心控制器等(DiapatcherServlet)

<!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>
  <!--配置解决中文乱码的过滤器-->
  <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>
  
  <!--配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载初始化文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath*:springmvc.xml</param-value>
    </init-param>
    <!--启动服务器，创建该servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

4.2 编写SpringMVC的配置文件

<?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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:mvcc="http://www.springframework.org/schema/cache"
       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
       http://www.springframework.org/schema/cache
       http://www.springframework.org/schema/cache/spring-cache.xsd">
    <!--开启注解扫描，只扫描controller注解-->
    <context:component-scan base-package="cn.itcast">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

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

    <!--静态资源的过滤-->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/>
    <mvc:resources location="/images/" mapping="/images/**"/>

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

5.Spring整合SpringMVC框架

5.3 配置监听器实现启动服务器创建容器（在web.xml配置文件中编写）

<!--配置spring的监听器,默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
<!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

5.2 编写controller和jsp页面进行测试前两个框架是否整合成功

整合成功的依据：在用户在页面点击查询按钮，发送请求，执行controller中的方法，如果方法中能成功的使用业务层对象调用业务层的查询方法，  
并返回查询结果。  这说明Spring和SpringMVC整合成功。

6.搭建Mybatis环境并测试

6.1 编写SqlMapConfig.xml配置文件

注意：这里使用代理dao的方式来操作持久层，所以不需要dao的实现类。  
<?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>
<!-- 配置连接数据库的信息 -->
<properties resource="jdbcConfig.properties"></properties>
<!-- 配置mybatis的环境 -->
<environments default="mysql">
	<environment id="mysql">
		<!-- 配置事务管理 -->
		<transactionManager type="JDBC"></transactionManager>
		<dataSource type="pooled">
			<property name="driver" value="${jdbc.driver}"/>
			<property name="url" value="${jdbc.url}"/>
			<property name="username" value="${jdbc.username}"/>
			<property name="password" value="${jdbc.password}"/>
		</dataSource>
	</environment>
</environments>

<!-- 指定映射文件位置，因为在接口中直接使用了注解的方式编写sql语句 -->
<mappers>
	<mapper class="com.xiaoshuai885.dao.IAccountDao"/>
</mappers>
</configuration> 


properties 文件中的内容： 
jdbc.driver=com.mysql.jdbc.Driver 
jdbc.url=jdbc:mysql://localhost:3306/ssm 
jdbc.username=root 
jdbc.password=

6.2 编写测试类测试mybatis框架是否和数据库正常交互

7.Spring整合Mybatis框架

7.1 整合成功的依据

在service层能够成功的调用到dao层的方法并返回结果。

7.2 整合思路

因为持久层accountDao是一个接口，我们使用的是dao的代理对象，如果能将这个代理对象放入ioc容器中，就可以在容器中拿到对象并调用方法。

7.3 Spring接管Mybatis的session工厂

<!--Spring整合Mybatis-->
<!--配置连接池-->

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm"/>
    <property name="user" value="root"/>
    <property name="password" value="******"/>
</bean>
<!--配置sqlSessionFactory工厂-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
</bean>
<!--配置AccountDao所在的包-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="cn.xiaoshuai885.dao"/>
</bean>

8.配置事务管理

<!--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>

<!--配置aop增强-->
<aop:config>
    <aop:pointcut id="exp" expression="execution(* com.xiaoshuai885.service.impl.*.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="exp"/>
</aop:config>

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