Springcloud (4) Declaring a trial service call feign

Use Fegin to invoke the service:

First modify the two Hello-server services to add

@GetMapping ("/hello1")
public string Hello (@RequestParam string name) {
    Return "Hello" + name;
}

@GetMapping ("/hello2")
Public User Hello (@RequestHeader String name, @RequestHeader the Integer age) {
    return new User (name,age);
}

@PostMapping ("/hello3")
Public String Hello (@RequestBody user user) {
    Return "Hello" +user.getname () + "," +user.getage ();
}
User entity class

public class User implements serializable{

    Private static final long serialversionuid = 2066603420531796503L;

    private String name;
    Private Integer age;

    Public User () {
    }

    Public User (String name, Integer age) {
    }

    Public String GetName () {
        return name;
    }

    public void SetName (String name) {
        THIS.name = name;
    }

    Public Integer Getage () {
        return age;
    }

    public void Setage (Integer age) {
        This.age = age;
    }
}

First, we introduce POM dependency

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
Then add the following annotations to the application:

@EnableDiscoveryClient
@EnableFeignClients

Application.properties configuration file

server.port=9001
Spring.application.name=feign-consumer
eureka.client.service-url.defaultzone=http://localhost:8877/eureka/,http://localhost:8898/eureka/

Writing feign clients

 @FeignClient ("Hello-server") 
 Public interface Feignservice {
 
 @RequestMapping ("/hello") 
 String He Llo (); 
 
 @GetMapping ("/hello1") 
 String Hello (@RequestParam ("name") string name); 
 
 @GetMapping ("/hello2") 
 User Hello (@RequestHeader ("name") String name, @RequestHeader ("age") of Integer age);  
 @PostMapping ("/hello3") 
 String Hello (@RequestBody user user); 
 
} 
 
 Control layer Invoke demo 

@RestController
public class Feigncontroller {

    @Resource
    Private Feignservice Feignservice;

    @RequestMapping ("/feign")
    Public String feign () {
        return Feignservice.hello ();
    }

    @RequestMapping ("/feign2")
    Public String feign2 () {
        String str1 = Feignservice.hello ("goblin");
        String str2 = Feignservice.hello ("Goblin", "N"). ToString ();
        String STR3 = Feignservice.hello (New User ("Goblin", 22));
        Return str1 + "+ str2 +" "+ str3;
    }

}

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Springcloud (4) Declaring a trial service call feign