• 声明式事务管理


    步骤:

             1) 引入spring-aop相关的4个jar文件

             2) 引入aop名称空间  【XML配置方式需要引入】

             3) 引入tx名称空间    【事务方式必须引入】


    package loaderman.a_tx;
    
    
    /**
     * Service
     */
    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);
    
            int i = 1 / 0; // 异常: 整个Service.save()执行成功的要回滚
    //
    //        // 第二次调用
            deptDao.save(dept);
        }
    }
    package loaderman.a_tx;
    
    import org.springframework.jdbc.core.JdbcTemplate;
    
    /**
     * dao实现,使用Spring对jdbc支持功能
     *
     */
    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());
        }
    }
    package loaderman.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;
        }
        
    }
    package loaderman.a_tx;
    
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class App {
    
        @Test
        public void testApp() throws Exception {
            //容器对象
            ApplicationContext ac = new ClassPathXmlApplicationContext("loaderman/a_tx/bean.xml");
    
            // 模拟数据
            Dept dept = new Dept();
            dept.setDeptName("测试2: 开发部2");
    
            DeptService deptService = (DeptService) ac.getBean("deptService");
            deptService.save(dept);
    
        }
    }
    <?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:///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="loaderman.a_tx.DeptDao">
            <property name="jdbcTemplate" ref="jdbcTemplate"></property>
        </bean>
     
        <!-- 4. service实例 -->
        <bean id="deptService" class="loaderman.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(* loaderman.a_tx.DeptService.save(..))" id="pt"/>
            <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
        </aop:config>
        
    </beans>      
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  • 原文地址:https://www.cnblogs.com/loaderman/p/10042953.html
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