1、Dao层：
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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
"1.0"encoding="UTF-8"?>
PUBLIC"-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
创建applicationContext-dao.xml
"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">
"classpath:properties/*.properties"/>
"dataSource"class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
"url"value="${jdbc.url}"/>
"username"value="${jdbc.username}"/>
"password"value="${jdbc.password}"/>
"driverClassName"value="${jdbc.driver}"/>
"maxActive"value="10"/>
"minIdle"value="5"/>
"sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
"dataSource"ref="dataSource"/>
"configLocation"value="classpath:mybatis/SqlMapConfig.xml"/>
"org.mybatis.spring.mapper.MapperScannerConfigurer">
"basePackage"value="mapper代理对象所在包的全路径"/>
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
"1.0"encoding="UTF-8"?>
"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">
"实现类所在的包的全路径 ">
创建applicationContext-trans.xml
"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">
"transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
"dataSource"ref="dataSource"/>
"txAdvice"transaction-manager="transactionManager">
"save*"propagation="REQUIRED"/>
"insert*"propagation="REQUIRED"/>
"add*"propagation="REQUIRED"/>
"create*"propagation="REQUIRED"/>
"delete*"propagation="REQUIRED"/>
"update*"propagation="REQUIRED"/>
"find*"propagation="SUPPORTS"read-only="true"/>
"select*"propagation="SUPPORTS"read-only="true"/>
"get*"propagation="SUPPORTS"read-only="true"/>
"txAdvice"
pointcut="切入点表达式" />
为了加载spring容器，在Web.Xml中编写如下
"1.0"encoding="UTF-8"?>
"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">
名字
contextConfigLocation
classpath:spring/applicationContext*.xml
org.springframework.web.context.ContextLoaderListener
3、表现层：
Springmvc框架，由springmvc管理controller
创建Springmvc.xml
"1.0"encoding="UTF-8"?>
"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">
"com.taotao.controller"/>
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
"prefix"value="/WEB-INF/jsp/"/>
"suffix"value=".jsp"/>
为了加载前端控制器（DispatcherServlet），在web.xml中编写如下
"1.0"encoding="UTF-8"?>
"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">
名字
欢迎页
CharacterEncodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
utf-8
CharacterEncodingFilter
/*
名字
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:spring/springmvc.xml
1
名字（与上面的名字保持一致即可）
/
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