sping配置声明式事务

1.没有配置事务的情况

bean.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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans.xsd      http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop.xsd         http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 1. 数据源对象: C3P0连接池 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring"></property><property name="user" value="root"></property><property name="password" value="root"></property><property name="initialPoolSize" value="3"></property><property name="maxPoolSize" value="10"></property><property name="maxStatements" value="100"></property><property name="acquireIncrement" value="2"></property></bean><!-- 2. JdbcTemplate工具类实例 --><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource"></property></bean><!-- 3. dao实例 --><bean id="deptDao" class="cn.itcast.a_tx.DeptDao"><property name="jdbcTemplate" ref="jdbcTemplate"></property></bean> <!-- 4. service实例 --><bean id="deptService" class="cn.itcast.a_tx.DeptService"><property name="deptDao" ref="deptDao"></property></bean></beans>      

Dept.java

package cn.itcast.a_tx;public class Dept {private int deptId;private String deptName;public int getDeptId() {return deptId;}public void setDeptId(int deptId) {this.deptId = deptId;}public String getDeptName() {return deptName;}public void setDeptName(String deptName) {this.deptName = deptName;}}

DeptDao.java

package cn.itcast.a_tx;import org.springframework.jdbc.core.JdbcTemplate;/** * dao实现，使用Spring对jdbc支持功能 * @author Jie.Yuan * */public class DeptDao {// 容器注入JdbcTemplate对象private JdbcTemplate jdbcTemplate;public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {this.jdbcTemplate = jdbcTemplate;}public void save(Dept dept){String sql = "insert into t_dept (deptName) values(?)";jdbcTemplate.update(sql,dept.getDeptName());}}

DeptService.java

package cn.itcast.a_tx;import org.springframework.jdbc.core.JdbcTemplate;/** * Service * @author Jie.Yuan * */public class DeptService {// 容器注入dao对象private DeptDao deptDao;public void setDeptDao(DeptDao deptDao) {this.deptDao = deptDao;}/* * 事务控制？ */public void save(Dept dept){    // 第一次调用   deptDao.save(dept);           // 第二次调用   deptDao.save(dept);   int i = 1/0; // 异常： 整个Service.save()执行成功的要回滚}}

App.java

package cn.itcast.a_tx;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class App {@Testpublic void testApp() throws Exception {//容器对象ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/a_tx/bean.xml");// 模拟数据Dept dept = new Dept();dept.setDeptName("测试： 开发部");DeptService deptService = (DeptService) ac.getBean("deptService");deptService.save(dept);}}

运行结果：尽管后面程序出现异常，两条数据都插入了数据库

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现在我们在配置文件中加上声明式事务管理配置

bean.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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans.xsd      http://www.springframework.org/schema/context         http://www.springframework.org/schema/context/spring-context.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop.xsd         http://www.springframework.org/schema/tx      http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 1. 数据源对象: C3P0连接池 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring"></property><property name="user" value="root"></property><property name="password" value="root"></property><property name="initialPoolSize" value="3"></property><property name="maxPoolSize" value="10"></property><property name="maxStatements" value="100"></property><property name="acquireIncrement" value="2"></property></bean><!-- 2. JdbcTemplate工具类实例 --><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource"></property></bean><!-- 3. dao实例 --><bean id="deptDao" class="cn.itcast.a_tx.DeptDao"><property name="jdbcTemplate" ref="jdbcTemplate"></property></bean> <!-- 4. service实例 --><bean id="deptService" class="cn.itcast.a_tx.DeptService"><property name="deptDao" ref="deptDao"></property></bean><!-- #############5. Spring声明式事务管理配置############### --><!-- 5.1 配置事务管理器类 --><bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"></property></bean><!-- 5.2 配置事务增强(如果管理事务?) --><tx:advice id="txAdvice" transaction-manager="txManager"><tx:attributes><tx:method name="*" read-only="false"/></tx:attributes></tx:advice><!-- 5.3 Aop配置： 拦截哪些方法(切入点表表达式) + 应用上面的事务增强配置 --><aop:config><aop:pointcut expression="execution(* cn.itcast.a_tx.DeptService.save(..))" id="pt"/><aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/></aop:config></beans>