mybatis在web框架spring中的配置应用

mybatis结合spring框架实现数据持久化，是目前项目中用到的主流技术。

使用的流程大概是这样的（针对maven项目）

1、引入mybatis的包还有和spring结合的包

 <dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis-spring</artifactId>
   <version>1.2.0</version>
</dependency>
<dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis</artifactId>
   <version>3.2.3</version>
</dependency>

2、引入数据库驱动(针对mysql)

            mysql
            mysql-connector-java
            5.1.34

3、添加数据源和mybatis配置。

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
   destroy-method="close">
   <property name="url" value="${mysql.jdbc.url}" />
   <property name="username" value="${mysql.jdbc.username}" />
   <property name="password" value="${mysql.jdbc.password}" />
   <property name="driverClassName" value="${mysql.jdbc.driver}" />
   <property name="maxWait" value="${mysql.jdbc.maxWait}" />
   <property name="maxActive" value="${mysql.jdbc.maxActive}" />
   <property name="initialSize" value="${mysql.jdbc.initialSize}" />
   <property name="minIdle" value="${mysql.jdbc.minIdle}" />
   <property name="timeBetweenEvictionRunsMillis" value="${mysql.jdbc.timeBetweenEvictionRunsMillis}" />
   <property name="minEvictableIdleTimeMillis" value="${mysql.jdbc.minEvictableIdleTimeMillis}" />
   <property name="removeAbandonedTimeout" value="${mysql.jdbc.removeAbandonedTimeout}" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
    <property name="dataSource" ref="dataSource"/>     
   <property name="mapperLocations" value="classpath*:com/mybatis/mapping/*.xml" />
</bean>

<bean name="ScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
     <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> 
    <property name="basePackage" value="com.mybatis.dao" />     
</bean>

4、添加事务

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

另外，自然不要忘了在xml引入spring的命名空间：

<?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:context="http://www.springframework.org/schema/context"
   xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
   xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:task="http://www.springframework.org/schema/task"
   xsi:schemaLocation="
      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
      http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
      http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
      http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd"
   default-lazy-init="true">

这样一个完整的mybatis和spring结合的框架就搭建完成了。剩下的工作就是在相应的文件夹下去实现dto、dao、xml