spring和mybatis的整合配置

参考自：

http://www.cnblogs.com/wangmingshun/p/5674633.html

链接中的文章里一共有三种整合方式，太多了怕记混了。

我这里只保留第二种。

spring中引入properties文件至少有以下两种方式：

a.

<!-- 引入db.properties -->
<context:property-placeholder location="classpath:db.properties" />

b.

 <!-- 引入properties文件 -->
 <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
     <property name="location" value="classpath:jdbc.properties" />
 </bean>

我觉得还是第一种比较更简单一些。

2、采用接口org.apache.ibatis.session.SqlSession的实现类org.mybatis.spring.SqlSessionTemplate。
　　mybatis中, sessionFactory可由SqlSessionFactoryBuilder.来创建。MyBatis-Spring 中，使用了SqlSessionFactoryBean来替代。SqlSessionFactoryBean有一个必须属性dataSource，另外其还有一个通用属性configLocation（用来指定mybatis的xml配置文件路径）。
spring-mybatis.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/beans
                         http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                         http://www.springframework.org/schema/context
                         http://www.springframework.org/schema/context/spring-context-3.1.xsd
                         http://www.springframework.org/schema/mvc
                         http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
     <!-- 自动扫描 -->
     <context:component-scan base-package="com.hua.saf" />
     <!-- 引入properties文件 -->
     <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
         <property name="location" value="classpath:jdbc.properties" />
     </bean>

     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
         <property name="driverClassName" value="${driver}" />
         <property name="url" value="${url}" />
         <property name="username" value="${username}" />
         <property name="password" value="${password}" />
         <!-- 初始化连接大小 -->
         <property name="initialSize" value="${initialSize}" />
         <!-- 连接池最大数量 -->
         <property name="maxActive" value="${maxActive}" />
         <!-- 连接池最大空闲 -->
         <property name="maxIdle" value="${maxIdle}" />
         <!-- 连接池最小空闲 -->
         <property name="minIdle" value="${minIdle}" />
         <!-- 获取连接最大等待时间 -->
         <property name="maxWait" value="${maxWait}" />
     </bean>

     <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
         <property name="dataSource" ref="dataSource" />
         <property name="configLocation"  value="classpath:sqlMapConfig.xml"/>
         <!-- 自动扫描mapping.xml文件，**表示迭代查找,也可在sqlMapConfig.xml中单独指定xml文件-->
         <property name="mapperLocations" value="classpath:com/hua/saf/**/*.xml" />
     </bean>

     <!-- mybatis spring sqlSessionTemplate,使用时直接让spring注入即可 -->
     <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
         <constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
     </bean>

     <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <property name="dataSource" ref="dataSource" />
     </bean>
 </beans>

sqlMapConfig.xml

 <?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>
     <typeAliases>
         <typeAlias type="com.hua.saf.pojo.User" alias="User" />
     </typeAliases>
 </configuration>

User.java

 public class User {

     private int id;
     private String username;
     private String password;
     private int age;

     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     public String getUsername() {
         return username;
     }
     public void setUsername(String username) {
         this.username = username;
     }
     public String getPassword() {
         return password;
     }
     public void setPassword(String password) {
         this.password = password;
     }
     public int getAge() {
         return age;
     }
     public void setAge(int age) {
         this.age = age;
     }
 }

UserDao.java

 @Repository
 public class UserDao{

     @Resource
     private SqlSessionTemplate sqlSessionTemplate;

     public User getUser(int id) {
         return sqlSessionTemplate.selectOne(this.getClass().getName() + ".getUser", 1);
     }
 }

UserService.java

 @Service
 public class UserService{

     @Resource
     private UserDao userDao;

     public User getUser(int id) {
         return userDao.getUser(id);
     }
 }