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应用平台 APPSTAGE-构建Spring Cloud工程:创建子工程ServiceA

时间：2024-10-21 10:40:12

应用平台 APPSTAGE 开发指导

创建子工程ServiceA

创建Maven工程。

图2 创建Maven工程
新建src目录。

图3 新建src目录

编写业务代码。

图4 业务代码文件

编写启动类

package com.huawei.demo.servicea;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

/**
 * 启动类
 *
 * @author XXX
 * @since 2023-12-05
 */
@SpringBootApplication
@EnableEurekaClient
public class ServiceASpringbootApplication {
    public static void main(String[] args) {
        SpringApplication.run(ServiceASpringbootApplication.class, args);
    }
}

编写Controller类

package com.huawei.demo.servicea.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.huawei.demo.servicea.pojo.UserInfo;
import com.huawei.demo.servicea.service.UserService;

/**
 * 用户对外接口
 *
 * @author XXX
 * @since 2023-12-06
 */
@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;

    @GetMapping("/{userId}")
    public UserInfo getUserByName(@PathVariable String userId) {
        return userService.getUserById(userId);
    }
}

编写Mapper类

package com.huawei.demo.servicea.mapper;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import com.huawei.demo.servicea.pojo.UserInfo;

/**
 * 用户查询
 *
 * @author XXX
 * @since 2023-12-06
 */
@Mapper
public interface UserMapper {
    @Select("select * from demo_user_info where user_id = #{userId}")
    UserInfo getUserById(String userId);
}

编写Pojo类

package com.huawei.demo.servicea.pojo;

import lombok.Data;

/**
 * user信息
 *
 * @author XXX
 * @since 2023-12-06
 */
@Data
public class UserInfo {
    private String userId;

    private String userName;

    private String phone;

    private String address;
}

编写Service类

package com.huawei.demo.servicea.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.huawei.demo.servicea.mapper.UserMapper;
import com.huawei.demo.servicea.pojo.UserInfo;

/**
 * userService
 *
 * @author XXX
 * @since 2023-12-06
 */
@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;

    public UserInfo getUserById(String userId) {
        return userMapper.getUserById(userId);
    }
}

配置微服务

server:
  port: 8081
spring:
  application:
    name: demoServiceA
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/spring_cloud_demo?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    username: root
    password: ***
    driver-class-name: com.mysql.jdbc.Driver

mybatis:
  configuration:
    map-underscore-to-camel-case: true
  type-aliases-package: com.huawei.dmo.servicea

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