spring与mybatis三种整合方法

刺骨的言语ヽ痛彻心扉 2024-02-18 15:05 37阅读 0赞

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

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);
        }
    }