spring整合mybatis的几种配置方式
Spring与Mybatis进行整合，主要是体现在DAO层的XML配置以及mybatis的XML配置，springMVC配置文件与service层的配置文件都不做更改，那么在这里，springMVC的xml配置就不进行累述了，下面直接进入spring与mybatis的整合配置阶段，废话不多说，直接上配置如下:
首先mybatis的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>
<settings>
<setting name="jdbcTypeForNull" value="NULL"/>
settings>
<typeAliases>
<package name="com.p2p.PO"/>
typeAliases>
<mappers >
<mapper resource="com/p2p/sql/ProductCategoryMapper.xml"/>
mappers>
configuration>
方式一、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。
ApplicationContext-dao.xml
<context:property-placeholder location="classpath:config/db.properties"/>
<bean id="dataSource"class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driver}">property>
<property name="url" value="${jdbc.url}">property>
<property name="username" value="${jdbc.username}">property>
<property name="password" value="${jdbc.password}">property>
bean>
<bean id="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
加载mybatis配置文件 -->
<property name="configLocation" value="classpath:config/mybatis/sqlMapConfig.xml">property>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource"ref="dataSource">property>
bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<tx:advice id="txAdive" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="save*"propagation="REQUIRED">tx:method>
<tx:method name="delete*"propagation="REQUIRED">tx:method>
<tx:method name="insert*"propagation="REQUIRED">tx:method>
<tx:method name="update*"propagation="REQUIRED">tx:method>
<tx:method name="find*"propagation="SUPPORTS" read-only="true">tx:method>
<tx:method name="get*"propagation="SUPPORTS" read-only="true">tx:method>
<tx:method name="select*"propagation="SUPPORTS" read-only="true">tx:method>
tx:attributes>
tx:advice>
<aop:config>
<aop:pointcut expression="execution(* com.p2p.service.impl.*.*(..))"id="transactionPointcut"/>
<aop:advisor advice-ref="txAdive" pointcut-ref="transactionPointcut"/>
aop:config>
beans>
采用以上这种方式进行整合配置需要注意以下几点:
1、mapper层接口采用注解@MapperScan的形式进行配置，如果是mapper和mapper.xml是在同包下，就不需要注解，但是名称必须一致
2、在service层使用@Resource注入mapper,方才可以通过注入的mapper调用mapper接口下的方法
3、此种方式导致写一句SQL就要在接口中对应添加一个同名方法，否则服务启动就报错
mapper接口示例:
@MapperScan
public interfaceProductCategoryMapper {
public voidupdate_test1()throws SQLException;
public voidupdate_test()throws SQLException;
}
方式二、采用接口org.apache.ibatis.session.SqlSession的实现类org.mybatis.spring.SqlSessionTemplate。
ApplicationContext-dao.xml
<context:property-placeholder location="classpath:config/db.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc.driver}">property>
<property name="url" value="${jdbc.url}">property>
<property name="username" value="${jdbc.username}">property>
<property name="password" value="${jdbc.password}">property>
<property name="initialSize" value="${initialSize}">property>
<property name="maxActive" value="${maxActive}">property>
<property name="maxIdle" value="${maxIdle}">property>
<property name="minIdle" value="${minIdle}">property>
<property name="maxWait" value="${maxWait}">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
<property name="configLocation" value="classpath:config/mybatis/sqlMapConfig.xml">property>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource">property>
bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<tx:advice id="txAdive"transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="save*" propagation="REQUIRED">tx:method>
<tx:method name="delete*" propagation="REQUIRED">tx:method>
<tx:method name="insert*" propagation="REQUIRED">tx:method>
<tx:method name="update*" propagation="REQUIRED">tx:method>
<tx:method name="find*" propagation="SUPPORTS"read-only="true">tx:method>
<tx:method name="get*" propagation="SUPPORTS"read-only="true">tx:method>
<tx:method name="select*" propagation="SUPPORTS"read-nly="true">tx:method>
tx:attributes>
tx:advice>
<aop:config>
<aop:pointcut expression="execution(* com.p2p.service.impl.*.*(..))"id="transactionPointcut"/>
<aop:advisor advice-ref="txAdive" pointcut-ref="transactionPointcut"/>
aop:config>
beans>
采用以上这种方式进行整合配置需要注意以下几点:
1、DAO层类采用注解@Repository的形式进行配置，并且配置文件中必须有包扫描器扫描DAO层
2、通过注解@Resource注入模板，通过模板调用模板类的公共方法，只需要在DAO层实现类中写几个公共方法
3、在service层直接通过注解@Resource注入这个dao就可以使用了，service层传入SQLID来区别执行哪句SQL，通用性还是不错的
DAO层公共示例：
@Repository
public classProductCategoryDao {
@Resource
private SqlSessionTemplatesqlSessionTemplate;
public voidupdate(String name) {
sqlSessionTemplate.update(name, null);
}
}
三、采用抽象类org.mybatis.spring.support.SqlSessionDaoSupport提供SqlSession。
ApplicationContext-dao.xml
<context:component-scan base-package="com.p2p.DAO" />
<context:property-placeholder location="classpath:config/db.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc.driver}">property>
<property name="url" value="${jdbc.url}">property>
<property name="username" value="${jdbc.username}">property>
<property name="password" value="${jdbc.password}">property>
<property name="initialSize" value="${initialSize}">property>
<property name="maxActive" value="${maxActive}">property>
<property name="maxIdle" value="${maxIdle}">property>
<property name="minIdle" value="${minIdle}">property>
<property name="maxWait" value="${maxWait}">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
<property name="configLocation" value="classpath:config/mybatis/sqlMapConfig.xml">property>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource">property>
bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<tx:advice id="txAdive"transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="save*" propagation="REQUIRED">tx:method>
<tx:method name="delete*" propagation="REQUIRED">tx:method>
<tx:method name="insert*" propagation="REQUIRED">tx:method>
<tx:method name="update*" propagation="REQUIRED">tx:method>
<tx:method name="find*" propagation="SUPPORTS"read-only="true">tx:method>
<tx:method name="get*" propagation="SUPPORTS"read-only="true">tx:method>
<tx:method name="select*" propagation="SUPPORTS"read-nly="true">tx:method>
tx:attributes>
tx:advice>
<aop:config>
<aop:pointcut expression="execution(* com.p2p.service.impl.*.*(..))"id="transactionPointcut"/>
<aop:advisor advice-ref="txAdive" pointcut-ref="transactionPointcut"/>
aop:config>
beans>
采用以上这种方式进行整合配置需要注意以下几点:
1、通过注解@Repository配合包扫描器，将sqlSessionFactory注入-
2、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
3、也可在spring-mybatis.xml中如下配置，在service层注入这个bean，但是这种有多少个dao就要配置多少个，多个dao就很麻烦。
//
//
//
4、xml配置文件中必须使用包扫描器扫描DAO层，否则注入失败
5、只需要DAO写几个公共增删改查方法就好，通过传入sqlID辨别需要执行哪句SQL
示例:
@Repository
public classProductCategoryDao extends SqlSessionDaoSupport{
@Resource
public voidsetSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
System.out.println("[session]"+sqlSessionFactory);
super.setSqlSessionFactory(sqlSessionFactory);
}
public voidupdate(String name) {
this.getSqlSession().update(name, null);
}
}
PS: 以上就是spring与mybatis进行整合的几种配置方式，特此记录一下