模拟数据在用户服务实现简单的查询

最新推荐文章于 2024-10-12 08:34:25 发布

原创最新推荐文章于 2024-10-12 08:34:25 发布 · 469 阅读

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#login_service服务调用user_service

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本文详细介绍了一个基于Spring Cloud的微服务架构实现过程，包括用户服务（userService）和登录服务（login_service）的搭建，通过Feign实现服务间调用，以及在Eureka注册中心的配置。

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1 在userService项目新增service serviceImpl 模拟查询数据库

@Service
public class UserServiceImpl  implements UserService {
    public   static  final Map<String,User> resMap = new HashMap<String,User>();
    static {
        User u1= new User("1","张三","zhangsan","1234");
        User u2= new User("2","张三1","zhangsan1","1234");
        User u3= new User("3","张三2","zhangsan2","1234");
        User u4= new User("4","张三3","zhangsan3","1234");
        User u5= new User("5","张三4","zhangsan4","1234");
        resMap.put("1",u1);
        resMap.put("2",u2);
        resMap.put("3",u3);
        resMap.put("4",u4);
        resMap.put("5",u5);
    }


    @Override
    public List<User> getList() {
        Collection<User> collection= resMap.values();
        List<User> userList =  new ArrayList<User>(collection);
        return userList;
    }

    @Override
    public User findUser(String id) {

        return resMap.get(id);

    }
}

2新建controller

@RestController
@RequestMapping(value="/api/user/")
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping(value="list")
    public Object List(){
      
        return   userService.getList();
    }
    @RequestMapping( value="find")
    public Object findById(@RequestParam("id") String  id){
            
        return  userService.findUser(id);
    }

}

3 启动user_service服务测试一下

4 模拟登录login_srvice 调用user_service用户查询 Feign

新建login_service项目

增加依赖

	<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-openfeign</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
		</dependency>

5 增加feignClient

FeignClient("USER-SERVICE") // 服务名称USER-SERVICE
public interface UserFeignClient {
@RequestMapping(method = RequestMethod.GET, value ="/api/user/list")
    List<Object> getUserList();
@RequestMapping(method = RequestMethod.GET,value ="/api/user/find")
Object getById(@RequestParam("id") String  id);


}

6 新增controller

@RestController
public class LoginController {
    @Autowired
    private UserFeignClient userFeignClient;
@RequestMapping("/list")
    public Object getList(){
        return  userFeignClient.getUserList();
    }
}

7 修改yml文件

server:
  port: 8991

spring:
  application:
    name: login-service

eureka:
 hostname:
  client:
   serviceUrl:
     defaultZone: http://localhost:8761/eureka/



feign:
  client:
    config:
      default:
        connectTimeout: 5000
        readTimeout: 5000
        loggerLevel: basic

8 查看注册中心