spring与mybatis三种整合方法

1、采用MapperScannerConfigurer，它将会查找类路径下的映射器并自动将它们创建成MapperFactoryBean。
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">
    
    <context:component-scan base-package="com.hua.saf" />
    
    <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}" />
        
        <property name="initialSize" value="${initialSize}" />
        
        <property name="maxActive" value="${maxActive}" />
        
        <property name="maxIdle" value="${maxIdle}" />
        
        <property name="minIdle" value="${minIdle}" />
        
        <property name="maxWait" value="${maxWait}" />
    bean>

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

    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.hua.saf.*" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    bean>
    
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    bean>    
beans>

 UserMapper.xml:

xml version="1.0" encoding="UTF-8" ?>
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.hua.saf.dao.UserDao">
　　
　　
　　<select id="getUser" parameterType="int" resultType="com.hua.saf.pojo.User"> 　　　　select * from t_user where id=#{id} 　　select>
mapper>

dao类：

/** * 这里的@MapperScan就是上面所讲的Mapper扫描器中所需要的配置，会自动生成代理对象。 * 注意，接口中的方法名称要和对应的MyBatis映射文件中的语句的id值一样，因为生成的 * 动态代理，会根据这个匹配相应的Sql语句执行。另外就是方法的参数和返回值也需要注 * 意。接口中的方法如何定义，对应的MyBatis映射文件就应该进行相应的定义。 * 最后，标注中的userDao是用来作为Spring的Bean的id(或name)进行使用的，方便我 * 们在Service层进行注入使用。 */ @MapperScan public interface UserDao { 　　//此处的方法名必须和mapper中的映射文件中的id同名 　　//回去映射文件中通过com.hua.saf.dao.UserDao.getUser,即this.getClass().getName()+".getUser"
　　public User getUser(int id); }

service类：

@Service("userService") public class UserServiceImpl implements IUserService { @Resource private UserDao userDao; 　　public User getUser(int id) { 　　　　return userDao.getUser(id); 　　} }

 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">
    
    <context:component-scan base-package="com.hua.saf" />
    
    <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}" />
        
        <property name="initialSize" value="${initialSize}" />
        
        <property name="maxActive" value="${maxActive}" />
        
        <property name="maxIdle" value="${maxIdle}" />
        
        <property name="minIdle" value="${minIdle}" />
        
        <property name="maxWait" value="${maxWait}" />
    bean>

    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:sqlMapConfig.xml"/>
        
        <property name="mapperLocations" value="classpath:com/hua/saf/**/*.xml" />
    bean>
    
    
    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory">constructor-arg>
    bean>

    
    <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); } }

3、采用抽象类org.mybatis.spring.support.SqlSessionDaoSupport提供SqlSession。
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">
    
    <context:component-scan base-package="com.hua.saf" />
    
    <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}" />
        
        <property name="initialSize" value="${initialSize}" />
        
        <property name="maxActive" value="${maxActive}" />
        
        <property name="maxIdle" value="${maxIdle}" />
        
        <property name="minIdle" value="${minIdle}" />
        
        <property name="maxWait" value="${maxWait}" />
    bean>

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

    
    <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 extends SqlSessionDaoSupport{ public User getUser(int id) { return this.getSqlSession().selectOne(this.getClass().getName() + ".getUser", 1); } 　　//使用SqlSessionDaoSupport必须注意，此处源码1.1.1中有自动注入，1.2中取消了自动注入，需要手工注入，侵入性强 　　//也可在spring-mybatis.xml中如下配置，但是这种有多少个dao就要配置到少个，多个dao就很麻烦。 　　// 　　//  　　//
 @Resource public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) { // TODO Auto-generated method stub
        super.setSqlSessionFactory(sqlSessionFactory); } }

UserService.java

@Service public class UserService{ @Resource private UserDao userDao; public User getUserss(int id) { return userDao.getUser(1); } }