ssm框架整合思路及代码

1、Dao层：

mybatis整合spring，通过spring创建数据库连接池，管理SqlSessionFactory、mapper代理对象。需要mybatis和spring的整合包

创建SqlMapConfig.xml配置文件

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>

configuration>

创建applicationContext-dao.xml

<beansxmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"xmlns:p="http://www.springframework.org/schema/p"

xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.2.xsd

http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsd

http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd

http://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util-4.2.xsd">

<context:property-placeholderlocation="classpath:properties/*.properties"/>

<bean id="dataSource"class="com.alibaba.druid.pool.DruidDataSource"

destroy-method="close">

<property name="url"value="${jdbc.url}"/>

<property name="username"value="${jdbc.username}"/>

<property name="password"value="${jdbc.password}"/>

<property name="driverClassName"value="${jdbc.driver}"/>

<property name="maxActive"value="10"/>

<property name="minIdle"value="5"/>

bean>

<bean id="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">

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

<property name="configLocation"value="classpath:mybatis/SqlMapConfig.xml"/>

bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<property name="basePackage"value="mapper代理对象所在包的全路径"/>

bean>

beans>

为了便于更改数据库，编写db.properties文件

jdbc.driver=数据库驱动

jdbc.url=jdbc:mysql://localhost:3306/数据库名称?characterEncoding=utf-8

jdbc.username=用户名

jdbc.password=密码

2、Service层：

所有的service实现类都放到spring容器中管理。由spring管理实务。

创建applicationContext-service.xml

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

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"xmlns:p="http://www.springframework.org/schema/p"

xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.2.xsd

http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsd

http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-4.2.xsd

http://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util-4.2.xsd">

<context:component-scanbase-package="实现类所在的包的全路径 ">context:component-scan>

beans>

创建applicationContext-trans.xml

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"xmlns:p="http://www.springframework.org/schema/p"

xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.2.xsd

http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsd

http://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd

http://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util-4.2.xsd">

<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="save*"propagation="REQUIRED"/>

<tx:method name="insert*"propagation="REQUIRED"/>

<tx:method name="add*"propagation="REQUIRED"/>

<tx:method name="create*"propagation="REQUIRED"/>

<tx:method name="delete*"propagation="REQUIRED"/>

<tx:method name="update*"propagation="REQUIRED"/>

<tx:method name="find*"propagation="SUPPORTS"read-only="true"/>

<tx:method name="select*"propagation="SUPPORTS"read-only="true"/>

<tx:method name="get*"propagation="SUPPORTS"read-only="true"/>

tx:attributes>

tx:advice>

<aop:config>

<aop:advisoradvice-ref="txAdvice"

pointcut="切入点表达式" />

aop:config>

beans>

为了加载spring容器，在Web.Xml中编写如下

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

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

id="WebApp_ID" version="2.5">

<display-name>名字display-name>

<context-param>

<param-name>contextConfigLocationparam-name>

<param-value>classpath:spring/applicationContext*.xmlparam-value>

context-param>

<listener>

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

listener>

web-app>

3、表现层：

Springmvc框架，由springmvc管理controller

创建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:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.2.xsd

http://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd

http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsd">

<context:component-scanbase-package="com.taotao.controller"/>

<mvc:annotation-driven/>

<bean

class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix"value="/WEB-INF/jsp/"/>

<property name="suffix"value=".jsp"/>

bean>

beans>

为了加载前端控制器（DispatcherServlet），在web.xml中编写如下

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

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"

id="WebApp_ID" version="2.5">

<display-name>名字display-name>

<welcome-file-list>

<welcome-file>欢迎页welcome-file>

welcome-file-list>

<filter>

<filter-name>CharacterEncodingFilterfilter-name>

<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>

<init-param>

<param-name>encodingparam-name>

<param-value>utf-8param-value>

init-param>

filter>

<filter-mapping>

<filter-name>CharacterEncodingFilterfilter-name>

<url-pattern>/*url-pattern>

filter-mapping>

<servlet>

<servlet-name>名字servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>

<init-param>

<param-name>contextConfigLocationparam-name>

<param-value>classpath:spring/springmvc.xmlparam-value>

init-param>

<load-on-startup>1load-on-startup>

servlet>

<servlet-mapping>

<servlet-name>名字（与上面的名字保持一致即可）servlet-name>

<url-pattern>/url-pattern>

servlet-mapping>

web-app>