问题背景

从零开始学springcloud微服务项目
注意事项：

约定 > 配置 > 编码
IDEA版本2021.1
这个项目，我分了很多篇章，每篇文章一个操作步骤，目的是显得更简单明了
controller调service，service调dao
项目源码以及sentinel安装包

项目搭建

1 创建提供者支付微服务相关mysql表

 CREATE TABLE `payment` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'ID',
  `serial` varchar(200) DEFAULT '',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8

2 IDEA新建entities，dao，mapper文件夹

3 在entities新建Payment，实现Serializable接口，后续做分布式架构

package com.yg.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

/**
 * @Author suolong
 * @Date 2022/6/14 21:13
 * @Version 2.0
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Payment implements Serializable {

    private Long id;
    private String serial;

}

4 在entities中新建封装类CommonResult

package com.yg.springcloud.entities;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Author suolong
 * @Date 2022/6/14 21:15
 * @Version 2.0
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CommonResult<T> {

    private Integer code;
    private String message;
    private T data;

    public CommonResult(Integer code, String message) {
        this(code, message, null);
    }
}

5 在dao中新建PaymentDao接口

package com.yg.springcloud.dao;

import com.yg.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

/**
 * @Author suolong
 * @Date 2022/6/14 21:19
 * @Version 2.0
 */
@Mapper
public interface PaymentDao {


    public int create(Payment payment);

    public Payment getPaymentById(@Param("id") Long id);

}

6 在mapper中新建PaymentMapper.xml数据库映射文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="com.yg.springcloud.dao.PaymentDao">

    <resultMap id="BaseResultMap" type="com.yg.springcloud.entities.Payment">
        <id column="id" property="id" jdbcType="BIGINT"/>
        <result column="serial" property="serial" jdbcType="VARCHAR"/>
    </resultMap>

    <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
        INSERT INTO payment(SERIAL)
        VALUES (#{serial});
    </insert>

    <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
        SELECT *
        FROM payment
        WHERE id = #{id};
    </select>

</mapper>

7 mysql插入一条数据

INSERT INTO `mysqltest`.`payment` (`id`, `serial`) VALUES (1, 'abc');

8 启动提供者支付module引用

9 导入实现类和服务接口

package com.yg.springcloud.service;

import com.yg.springcloud.entities.Payment;
import org.apache.ibatis.annotations.Param;

/**
 * @Author suolong
 * @Date 2022/6/14 21:32
 * @Version 2.0
 */
public interface PaymentService {

    public int create(Payment payment);

    public Payment getPaymentById(@Param("id") Long id);

}

package com.yg.springcloud.service.impl;

import com.yg.springcloud.dao.PaymentDao;
import com.yg.springcloud.entities.Payment;
import com.yg.springcloud.service.PaymentService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @Author suolong
 * @Date 2022/6/14 21:30
 * @Version 2.0
 */
@Service
public class PaymentServiceImpl implements PaymentService {

    @Resource
    private PaymentDao paymentDao;

    @Override
    public int create(Payment payment) {
        return paymentDao.create(payment);
    }

    @Override
    public Payment getPaymentById(Long id) {
        return paymentDao.getPaymentById(id);
    }

}

10 导入controller

package com.yg.springcloud.controller;

import com.yg.springcloud.entities.CommonResult;
import com.yg.springcloud.entities.Payment;
import com.yg.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * @Author suolong
 * @Date 2022/6/14 21:36
 * @Version 2.0
 */
@RestController
@Slf4j
public class PaymentController {

    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment) {
        int result = paymentService.create(payment);
        log.info("result哈哈哈: {}", result);
        if (result > 0) {
            return new CommonResult(200, "插入成功", result);
        }
        return new CommonResult(500, "插入失败", null);
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult<Payment> getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById(id);
        log.info("查询结果哈哈哈hahah:{}", payment);
        if (payment != null) {
            return new CommonResult(200, "查询成功哈", payment);
        } else {
            return new CommonResult(500, "没有对应记录,查询ID: " + id, null);
        }
    }

}

11 打开浏览器，输入查询的数据库 id

http://localhost:8001/payment/get/1

12 使用postman，输入

http://localhost:8001/payment/create?serial=qaz

13 查看数据库

14 整体目录结构

作为程序员第 172 篇文章，每次写一句歌词记录一下，看看人生有几首歌的时间，wahahaha ...

SpringCloud无介绍快使用，子module提供者支付微服务cloud-provider-payment8001业务开发（六）

SpringCloud无介绍快使用，子module提供者支付微服务cloud-provider-payment8001业务开发（六）

问题背景

项目搭建

Lyric：一只灰狼问候我谁是神枪手

相关阅读更多精彩内容

友情链接更多精彩内容

SpringCloud无介绍快使用，子module提供者支付微服务cloud-provider-payment8001业务开发（六）

问题背景

项目搭建

Lyric： 一只灰狼问候我谁是神枪手

相关阅读更多精彩内容

友情链接更多精彩内容

Lyric：一只灰狼问候我谁是神枪手