XML方式實現Spring聲明式事務管理

1、首先編寫一個實體類

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;
    }
    
}

2、編寫Dao層

public class DeptDao {
    // 容器注入JdbcTemplate對象
    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());
    }
}

3、編寫Server層

public class DeptService {
    // 容器注入dao對象
    private DeptDao deptDao;
    public void setDeptDao(DeptDao deptDao) {
        this.deptDao = deptDao;
    }
    public void save(Dept dept){
        deptDao.save(dept);
        int i = 1/0; // 異常： 整個Service.save()執行成功的要回滾
        // 第二次調用
        deptDao.save(dept);
    }
}

4、配置bean.xml文件

　　4.1加入tx聲明

xmlns:tx="http://www.springframework.org/schema/tx"

　　4.2加入tx約束

http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd

　　4.3編寫C3P0連接池

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></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>

　　4.4編寫JdbcTemplate工具類實例

    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

　　4.5編寫dao實例和service實例

    <bean id="deptDao" class="包名.DeptDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
    <bean id="deptService" class="包名.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>

　　4.6Spring聲明式事務管理配置

    <!-- 配置事務管理器類 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 配置事務增強(如果管理事務?) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    
    <!-- Aop配置： 攔截哪些方法(切入點表表達式) + 應用上面的事務增強配置 -->
    <aop:config>
        <aop:pointcut expression="execution(* cn.itcast.a_tx.DeptService.save(..))" id="pt"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>

　　4.7完整的bean.xml配置

<?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. 數據源對象: C3P0連接池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></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工具類實例 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 3. dao實例 -->
    <bean id="deptDao" class="包名.DeptDao">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
 
    <!-- 4. service實例 -->
    <bean id="deptService" class="包名.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>
    
    <!-- #############5. Spring聲明式事務管理配置############### -->
    <!-- 5.1 配置事務管理器類 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!-- 5.2 配置事務增強(如果管理事務?) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    
    <!-- 5.3 Aop配置： 攔截哪些方法(切入點表表達式) + 應用上面的事務增強配置 -->
    <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>      

5.測試類

public class App {

    public void testApp() throws Exception {
        //容器對象
        ApplicationContext ac = new ClassPathXmlApplicationContext("包名/bean.xml");
        // 模擬數據
        Dept dept = new Dept();
        dept.setDeptName("測試： 開發部");
        DeptService deptService = (DeptService) ac.getBean("deptService");
        deptService.save(dept);
    }
}