spring提供的事务配置--纯注解

spring提供的事务--纯注解

模拟转账业务  ,出错需要事务回滚,没错正常执行

事务和数据库技术都是spring的内置提供的

1.三层架构

IAccountDao接口

package com.dao;

import com.domain.Account;

/**
 *
 * @date 2019/11/6 15:25
 */
public interface IAccountDao {
    Account findAllById(Integer id);
    Account findAccountByName(String name);
    void updateAccount(Account account);
}

IAccountDao实现类

package com.dao.impl;

import com.dao.IAccountDao;
import com.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 *  账户实现类
 * @date 2019/11/6 15:27
 */
@Repository("accountDao")
public class IAccountDaoImpl  implements IAccountDao {
    @Autowired
    private JdbcTemplate template;

    @Override
    public Account findAllById(Integer id) {
        List<Account> query = template.query("select * from account where id= ?", new BeanPropertyRowMapper<>(Account.class), id);
        return query.isEmpty()?null:query.get(0);
    }

    @Override
    public Account findAccountByName(String name) {
        List<Account> accounts = template.query("select * from account where name= ?", new BeanPropertyRowMapper<>(Account.class),name);
        if (accounts.isEmpty()){
            return  null;
        }
        if (accounts.size()>1){
            throw  new RuntimeException("结果集不唯一");
        }
        return accounts.get(0);
    }

    @Override
    public void updateAccount(Account account) {
        template.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
    }
}

domain类

package com.domain;

import java.io.Serializable;

/**
 *
 * @date 2019/11/5 21:32
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Float money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name=‘" + name + ‘\‘‘ +
                ", money=" + money +
                ‘}‘;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Float getMoney() {
        return money;
    }

    public void setMoney(Float money) {
        this.money = money;
    }
}

IAccountService类

package com.service;

import com.domain.Account;

/**
 *  账户业务层
 * @date 2019/11/7 9:26
 */
public interface IAccountService {
    //根据id查询账户信息
    Account findAllById(Integer integer);
    /*转账
    * 转出账户,转入账户,转账金额*/
    void transfer(String sourceName, String targetName, Float f);
}

service层

测试层

原文地址：https://www.cnblogs.com/july7/p/11812883.html