编程式事务管理

　　通过使用将Spring框架提供的TransactionTemplate模板注入到业务层来进行事务管理，这样对业务层原来的代码修改过多。不利于项目的后期维护。

以下是声明式事务管理的具体代码实现：

环境搭建：

Dao层

package com.sdf.spring;/** * @author AT * 转账dao层 */public interface AccountDao {    /**     * 转出钱     * @param outer     * @param money     */    public void remove(String outer,Double money);    /**     * 转入钱     * @param input     * @param money     */    public void add(String input,Double money);}

dao层实现类

package com.sdf.spring;import org.springframework.jdbc.core.support.JdbcDaoSupport;/** * 转账dao层实现 */public class AccountDaoimpl extends JdbcDaoSupport implements AccountDao{    /**     * 转出钱     * @param outer     * @param money     */    @Override    public void remove(String outer, Double money) {        String sql = "update account set money = money - ? where name = ?";        this.getJdbcTemplate().update(sql, money,outer);    }    /**     * 转入钱     * @param input     * @param money     */    @Override    public void add(String input, Double money) {        String sql = "update account set money = money + ? where name = ?";        this.getJdbcTemplate().update(sql, money,input);    }    }

service业务层

package com.sdf.spring;/** * @author AT * 转账业务接口 */public interface AccountSevice {    public void transfer(String input,String out,Double money);//消费}

service业务层实现类

/** * @author AT *  编程式事务管理 */public class AccountServiceImpl implements AccountSevice {        @Resource(name="accountDao")    private AccountDao accountDao;    //在业务类中注入事务模板    @Resource(name="transactionTemplate")    private TransactionTemplate transactionTemplate;    @Override    public void transfer(final String input, final String out,final  Double money) {//        accountDao.remove(out, money);//        int a = 1/0;//        accountDao.add(input, money);        transactionTemplate.execute(new TransactionCallbackWithoutResult() {            @Override            protected void doInTransactionWithoutResult(TransactionStatus status) {                accountDao.add(input, money);                int a = 1/0;//模拟转账过程中发生故障                accountDao.remove(out, money);            }        });    }                public void setAccountDao(AccountDao accountDao) {        this.accountDao = accountDao;    }    public void setTransactionTemplate(TransactionTemplate transactionTemplate) {        this.transactionTemplate = transactionTemplate;    }}

applicationContext.xml配置文件

测试类

/** * @author AT * 测试转账信息     编程式事务管理 */@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration("classpath:applicationContext.xml")public class AccountTest {    @Resource(name="accountService")    private AccountSevice accountService;    @Test    public void test01(){        accountService.transfer("A", "B", 100d);    }    public void setAccountService(AccountSevice accountService) {        this.accountService = accountService;    }}