微服务模块

• 建module
• 改pom
• 写yml
• 主启动
• 业务类

创建子module
自动新增父类pom自动生成该内容

子类pom文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>cloud2020</artifactId>
        <groupId>com.hyf.springcloud</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>cloud-provider-payment8001</artifactId>
    
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!--mysql-connector-java-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jdbc-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

新建yml：如图位置创建application.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 com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root

mybatis:
  mapperLocations: classpath:mapper/*.xml  # 后续要写mapper文件，写专门的映射文件
  type-aliases-package: com.atguigu.springcloud.entities    # 所有Entity别名类所在包

主启动类

package com.hyf.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * @program: cloud2020
 * @description: 主启动
 * @author: 作者 :林木木
 * @create: 2022-01-11 10:43
 */
@SpringBootApplication
public class PaymentMain8001 {
    public static void main(String[] args) {
        SpringApplication.run(PaymentMain8001.class,args);
    }
}

在公司的业务下面，前后端分离架构，后端程序员需要做的就是给前端传递一个JSON字符串。

• 开启业务类。

1. 建表SQL
2. entities
3. daoservice
4. controller

 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

entities：

@Data
@AllArgsConstructor//全参
@NoArgsConstructor//无参
public class Payment {
    private Long id;
    private String serial;
}

//用于封装结果集，封装返回结果参数
@Data
@AllArgsConstructor//全参
@NoArgsConstructor//无参
public class CommonResult<T> {

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

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

mapper：

@Mapper
public interface PaymentDao {
    public int create(Payment payment);
    public Payment getPaymentById(@Param("id") Long id);
}

<?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.hyf.springcloud.dao.PaymentDao">

    <insert id="create" parameterType="com.hyf.springcloud.entities.Payment" useGeneratedKeys="true" keyProperty="id">
        insert into payment(serial) values(#{serial});
    </insert>

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

    <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
        select * from where id=#{id}
    </select>

</mapper>

service：

public interface PaymentService {

    public int create(Payment payment);
    public Payment getPaymentById(@Param("id") Long id);

}


impl
@Service
public class PaymentServiceImpl implements PaymentService {

    @Resource
    private PaymentDao paymentDao;

    public int create(Payment payment){
        return paymentDao.create(payment);
    }
    public Payment getPaymentById(Long id) {
        return paymentDao.getPaymentById(id);
    }
}

controller：

@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("***插入结果***"+result);
        if(result>0){
            return new CommonResult(200,"插入数据库成功",result);
        }
        return new CommonResult(400,"插入数据库失败",null);
    }

    @GetMapping(value = "/payment/getPaymentById/{id}")
    public CommonResult getPaymentById(@PathVariable("id")Long id){
        Payment result = paymentService.getPaymentById(id);
        log.info("***插入结果***"+result);
        if(result!=null){
            return new CommonResult(200,"查询成功",result);
        }
        return new CommonResult(400,"没有对应记录，查询失败，ID："+id,null);
    }
}

运行：

前提：数据库需要数据

结果：

OK！成功，该JSON就是你传给前端的数据。

再来测试一下！

哎
为什么报错，查看报错信息。。。。

哦，原来是浏览器不支持。

那我们怎么办呢？

凉拌！

不支持我们就换一个

我们用postman好了

你们看，是不是成功啦。
那我们再试试其他的。
注意：url部分的？后面的都是postman自动为我们拼接的，而不是我们自己敲得，我们实在body中传入参数。但是我个人在测试这个方法的时候，踩了一个坑，关于Params和Body的事情，有兴趣的可以点击一下（点我）。

查看数据库：

第二节结束。

标签：spring,springcloud,payment,boot,public,模块,org,第二节,id
来源： https://blog.csdn.net/hyfsbxg/article/details/122426016