声明式事务管理,基于AOP对目标代理,添加环绕通知,比编码方案优势,不具有侵入式,不需要修改原来的代码.

1.基于XML配置的声明式事务管理方案(案例)

     接口Service

public interface IAccountService {    public void account(String outname,String inname,double money);}

service实现类

//@Transactional()注解时使用

public class AccountServiceImpl implements IAccountService{

@Autowired

private IAccountDao accountDao;

public void setAccountDao(IAccountDao accountDao) {

this.accountDao = accountDao;

}

//转账操作的方法

@Override

public void account(String outname, String inname, double money) {

//从outname转出

accountDao.accountOut(outname,money);

int a=10/0;

//从inname转入

accountDao.accountIn(inname,money);

//setter注入

}

Dao接口

public interface IAccountDao {    public void accountOut(String outname, double money);    public void accountIn(String inname, double money);}

Dao实现类

1 //import org.springframework.jdbc.core.JdbcTemplate; 2 import org.springframework.jdbc.core.support.JdbcDaoSupport; 3 //由于JdbcDaoSupport的父类继承了Daosupport,它创建了JdbcTemplate,前提我们先注入一个dataSource 4 public class AccountDaoImpl extends JdbcDaoSupport implements IAccountDao{ 5     //private JdbcTemplate jdbcTemplate; 6     //从outname中取钱 7     @Override 8     public void accountOut(String outname, double money) { 9         this.getJdbcTemplate().update("update account set money=money-? where name= ?",money,outname);10     }11     //向inname中存钱12     @Override13     public void accountIn(String inname, double money) {14         this.getJdbcTemplate().update("update account set money=money+? where name= ?",money,inname);15     }16 17 }

测试类

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations="classpath:applicationContext.xml")public class accountServiceTest {    @Autowired    private IAccountService accountService;    @Test    public void test1() {        accountService.account("tom", "fox", 500);    }}

applicationContext.xml配置文件

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db.properties----------当我们需要频繁修改其中的内容,写到这个配置文件便于管理

jdbc.driverClass=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql:///springtestjdbc.username=rootjdbc.password=123