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:
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<?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:
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<?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类:
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/** * 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
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@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
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<?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
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<?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
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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
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@Repository public class UserDao{ @Resource private SqlSessionTemplate sqlSessionTemplate; public User getUser( int id) { return sqlSessionTemplate.selectOne( this .getClass().getName() + ".getUser" , 1 ); } } |
UserService.java
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@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
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<?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
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<?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
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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
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@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
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@Service public class UserService{ @Resource private UserDao userDao; public User getUserss( int id) { return userDao.getUser( 1 ); } } |
以上所述是小编给大家介绍的基于spring与mybatis三种整合方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持!
原文链接:http://www.cnblogs.com/wangmingshun/p/5674633.html