You do not know the spring and integrated approach mybatis

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1, using MapperScannerConfigurer
2, using the interface implementation class org.apache.ibatis.session.SqlSession org.mybatis.spring.SqlSessionTemplate
. 3, using the abstract class provide SqlSession org.mybatis.spring.support.SqlSessionDaoSupport

First, the use MapperScannerConfigurer

It will look mapper class path and automatically create them into 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"> <!-- 自动扫描 --> <context:component-scan base-package="com.hua.saf" /> <!-- 引入配置文件 --> <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" /> <!-- 自动扫描mapping.xml文件，**表示迭代查找 --> <property name="mapperLocations" value="classpath:com/hua/saf/**/*.xml" /> </bean> <!-- DAO接口所在包名，Spring会自动查找其下的类 ,包下的类需要使用@MapperScan注解,否则容器注入会失败 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.hua.saf.*" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </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> 

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"> <!-- 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的 例如namespace="me.gacl.mapping.userMapper"就是me.gacl.mapping(包名)+userMapper(userMapper.xml文件去除后缀) --> <mapper namespace="com.hua.saf.dao.UserDao"> 　　<!-- 　　在select标签中编写查询的SQL语句， 设置select标签的id属性为getUser，id属性值必须是唯一的，不能够重复, 　　使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型 　　resultType="com.hua.saf.User"就表示将查询结果封装成一个User类的对象返回,User类就是t_user表所对应的实体类 　　--> 　　<!-- 根据id查询得到一个user对象--> 　　<select id="getUser" parameterType="int" resultType="com.hua.saf.pojo.User"> 　　　　select * from t_user where id=#{id} 　　</select> </mapper> 

dao categories:

/** 
* 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 categories:

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

Second, using the interface implementation class org.mybatis.spring.SqlSessionTemplate of org.apache.ibatis.session.SqlSession

mybatis in, sessionFactory by SqlSessionFactoryBuilder. to create. MyBatis-Spring, the use of a SqlSessionFactoryBean instead. SqlSessionFactoryBean must have a property dataSource, which additionally there is a common attribute the configLocation (xml configuration file is used to specify the path of mybatis).

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" /> <!-- 引入配置文件 --> <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); } } 

Third, using the abstract class provide SqlSession org.mybatis.spring.support.SqlSessionDaoSupport

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" /> <!-- 引入配置文件 --> <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> <!-- (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 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。 　　//<bean id="userDao" class="com.hua.saf.dao.UserDao"> 　　// <property name="sqlSessionFactory" ref="sqlSessionFactory"/> 　　//</bean> @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); } }