事务管理

**事务处理**
1.编程式事务

//    编程式事务
    @Test
    public void test3(){
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-pool.xml");
        DruidDataSource ds = (DruidDataSource) context.getBean("dataSource");

        Connection con = null;
        Statement stmt = null;
        ResultSet result = null;

        try {
            con = ds.getConnection();
            stmt = con.createStatement();
            //关闭自动提交
            con.setAutoCommit(false);

            String insertSql = "insert into eac_core_biz "
                    + "(id, biz_system_id, biz_system_name, status_code, export, created_by, create_time, "
                    + "updated_by, update_time) values (14, ‘Test2‘, ‘帝景豪庭‘, 2, null, null, ‘2016-12-13 17:29:44‘, "
                    + "null, ‘2016-12-13 17:29:44‘)";
             //插入数据操作
            stmt.executeUpdate(insertSql);

            //模拟异常出现
            Assert.isTrue(false,"事务测试，模拟异常");

             //更新数据操作
            stmt.executeUpdate("update eac_core_biz set biz_system_id=‘efc‘ where id=14");
            //事务提交
            con.commit();
        } catch (Exception e) {
             //事务回滚
            try {
                con.rollback();
            } catch (SQLException e1) {
                e1.printStackTrace();
            }
        }finally{
            closeResultSet(result);
            closeStatement(stmt);
            closeConnection(con);
        }
    }

2.注解式事务

<!-- 定义数据源 -->
    <bean id="dataSource"
      class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/yun?characterEncoding=UTF8" />
        <property name="username" value="root" />
        <property name="password" value="centos" />
    </bean> 

     <!-- 定义JdbcTemplate的Bean -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
            p:dataSource-ref="dataSource">
    </bean>  

    <!-- 配置事务管理器 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
            p:dataSource-ref="dataSource">
    </bean>

    <!-- 开启注解事务 -->
    <tx:annotation-driven transaction-manager="txManager" /> 

    <bean id="userDao" class="com.guo.dao.impl.UserDaoImpl">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

接口 IUserDao

package com.guo.dao;

import com.guo.entity.User;

public interface IUserDao {
    void insertUser(User user);
}

实现 UserDaoImpl

package com.guo.dao.impl;

import java.sql.Types;

import org.apache.log4j.Logger;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.transaction.annotation.Transactional;

import com.guo.dao.IUserDao;
import com.guo.entity.User;

@Transactional
public class UserDaoImpl implements IUserDao {

    Logger LOGGER = Logger.getLogger(getClass());

    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public void insertUser(User user) {

        String insertSql = "insert into student (ID, NAME, AGE) values (?,?,?)";
        Object[] params = new Object[] { user.getId(),user.getName(),user.getAge() };
        int[] types = new int[] { Types.INTEGER, Types.VARCHAR,Types.INTEGER };
        int number = jdbcTemplate.update(insertSql, params, types);
        LOGGER.info("执行语句{insert into student (ID, NAME, AGE) values (?,?,?)}，生效"+number+"条。");

        //模拟异常出现
//        Assert.isTrue(false,"事务测试，模拟异常");
    }

}

@Transactional 注解可用于实现类上，也可以放在具体的方法上。

3.spring aop 拦截器事务