springcloud 整合 openfeign的方法

 <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-WEB</artifactId>
        </dependency>
        <!--服务注册与发现-->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-Nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>com.sofwin</groupId>
            <artifactId>springEntity</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

server:
  port: 7000
spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        heart-beat-interval: 1000
  application:
    name: openFeign

package com.sofwin;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
 

@SpringBootApplication
//开启服务注册与发现
@EnableDiscoveryClient
//开启Feign
@EnableFeignClients
public class App {
    public static void main(String[]args){
        SpringApplication.run(App.class,args);
    }
}

package com.sofwin.service;
 
import com.sofwin.pojo.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.cloud.openfeign.SpringQueryMap;
import org.springframework.web.bind.annotation.*;
 
import java.util.List;
 

//写的是服务端的名称 
@FeignClient("nacos-previder")
public interface UserService {
 
    @GetMapping("/user/data")
    String getUserName();
 
    @GetMapping("/user/info/{msg}")
    //这里注意了 这个注意@PathVariable 一定要添加name或者value属性
    String infoResful(@PathVariable(name = "msg") String msg);
 
    @GetMapping("/user/data5")
    //这里注意了 调用远程服务必须使用@RequesParam注解 并且名字与远程服务的参数名相同
    String simpleParam(@RequestParam("userName11") String userName,@RequestParam("pwd") String pwd);
 
    //其实openFeign默认就是JSON的格式  这里是为了规范
    @PostMapping("user/data6")
    User getUser (@RequestBody User user);
    @DeleteMapping("user/data7")
    User getUser2 (@RequestBody User user);
    //或者我们就可以使用一个注解 将json格式改为fORM表单的格式发送到远程服务中
    //然后远程不用写@RequestBody
    @PostMapping("user/data8")
    User getUser3 (@SpringQueryMap User user);
 
    //集合
    @PostMapping("user/data9")
    List<User> getList(@RequestBody User user);
}

package com.sofwin.controller;
 
import com.sofwin.pojo.User;
import com.sofwin.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
 
import java.util.List;
 

@RestController
@RequestMapping("/role")
public class RoleController {
 
    @Autowired
    private UserService userService;
    @GetMapping("/data")
    public String data(){
        String userName = userService.getUserName();
        return userName;
    }
    //Resful风格
    @GetMapping("data1")
    public  String infoResful(String msg){
        String s = userService.infoResful(msg);
        return s;
    }
    //简单类型的请求参数
    @GetMapping("/data2")
    public  String simpleParam(String userName,String pwd){
        return  userService.simpleParam(userName,pwd);
    }
    //自定义   json字符串 或者表单形式
    @PostMapping("/data3")
    public  User getUser(User user){
        return  userService.getUser(user);
    }
    @DeleteMapping("/data4")
    public  User getUser2(User user){
        return  userService.getUser2(user);
    }
    @PostMapping("/data5")
    public  User getUser3(User user){
        return  userService.getUser3(user);
    }
    //返回结果为集合类型
    @PostMapping("/data6")
    public List<User> getList(User user){
        return  userService.getList(user);
    }
}