微服务实战-从零开始，03新建服务提供者模块

在这里，我们约定：

订单模块（消费者）80端口

支付模块（提供者）8001端口

建立module快速口诀：

• 建module
• 改pom
• 写yml
• 主启动
• 业务类
• 测试

1.这里我们先建立提供者支付module

cloud-provider-payment8001

 2.改pom

    
        cloud2021
        com.jijie
        1.0-SNAPSHOT
    
    4.0.0

    cloud-provider-payment8001

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-actuator
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
        
        
            com.alibaba
            druid-spring-boot-starter
            1.1.10
        
        
        
            mysql
            mysql-connector-java
        
        
        
            org.springframework.boot
            spring-boot-starter-jdbc
        
        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        
        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

3.改yml

server:
  port: 8001

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://localhost:3306/cloud2021?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: jj789632145

mybatis:
  mapperLocations: classpath:mapper
@SpringBootApplication
public class PaymentMain8001 {

    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class,args);
    }

}

5.业务类

业务类编写

• 建表sql
• 实体类entities
• dao
• service
• controller

1）建表

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）实体类

package com.jijie.springcloud.entities;

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

import java.io.Serializable;


@Data
@AllArgsConstructor
@NoArgsConstructor
public class Payment implements Serializable {
    private Long id;
    private String serial;
}

3）dao层接口

package com.jijie.springcloud.dao;

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


@Mapper
public interface PaymentDao {

    int create(Payment payment);

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

}

mapper文件

    
        
        
    

    
        insert into payment(serial)  values(#{serial});
    



    
        select * from payment where id=#{id};
    

4）service层开发

package com.jijie.springcloud.service;

import com.jijie.springcloud.entities.Payment;


public interface PaymentService {

    int create(Payment payment);

    Payment getPaymentById(Long id);
}

service实现

package com.jijie.springcloud.service.impl;

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

import javax.annotation.Resource;


@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);
    }
}

5）controller层开发

package com.jijie.springcloud.controller;

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

import javax.annotation.Resource;


@RestController
@Slf4j
@RequestMapping("/payment")
public class PaymentController {
    @Resource
    private PaymentService paymentService;

    @PostMapping(value = "/create")
    public CommentResult create(Payment payment){
        int result = paymentService.create(payment);
        log.info("插入结果："+result);
        if (result > 0){
            return new CommentResult(200,"插入数据库成功",result);
        }
        return new CommentResult(444,"插入数据库失败");
    }

    @GetMapping(value = "/get/{id}")
    public CommentResult getPaymentById(@PathVariable("id") Long id){
        Payment result = paymentService.getPaymentById(id);
        log.info("查询结果："+result);
        if (result != null) {
            return new CommentResult(200,"查询成功",result);
        }
        return new CommentResult(444,"查询失败，查询id"+id);

    }

}

6）测试

打开浏览器，或者使用postman测试即可。