【Spring实现模拟银行转账】

数据库建表和插入数据

1、数据库建表

2、插入数据

项目目录

代码部分

1、IAccountDao.java

package com.qingruan.dao;
 
public interface IAccountDao {
    public void addMoney(String name,double money);
    public void subMoney(String name,double money);
 
}

2、AccountDaoImpl.java

package com.qingruan.dao.impl;
 
import com.qingruan.dao.IAccountDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
 
@Repository
public class AccountDaoImpl implements IAccountDao {
 
    @Autowired
    private JdbcTemplate jdbcTemplate;
 
    @Override
    public void addMoney(String name, double money) {
        String sql="update account set money = money + ? where name = ?";
        jdbcTemplate.update(sql,money,name);
    }
 
    @Override
    public void subMoney(String name, double money) {
        String sql="update account set money = money - ? where name = ?";
        jdbcTemplate.update(sql,money,name);
    }
}

3、IAccountService.java

package com.qingruan.service;
 
 
public interface IAccountService {
    public void transfer(String form,String target,double money);
}

4、AccountServiceImpl.java

package com.qingruan.service.impl;
 
import com.qingruan.dao.IAccountDao;
import com.qingruan.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
@Service
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;
 
    @Override
    public void transfer(String form, String target, double money) {
        accountDao.subMoney(form,money);
        //System.out.println(1/0);
        accountDao.addMoney(target,money);
    }
}

5、TestApp.java

package com.qingruan.test;
 
import com.qingruan.service.IAccountService;
import com.qingruan.service.impl.AccountServiceImpl;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class TestApp {
 
    @Test
    public void test(){
        ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
        AccountServiceImpl service = (AccountServiceImpl)app.getBean(IAccountService.class);
        service.transfer("李四","张三",500);
    }
}

配置文件

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