SpringCloud 声明试服务调用Feign

Posted Gggoblin

tags:

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利用fegin去调用服务:

先修改两个HELLO-SERVER服务中添加

@GetMapping("/hello1")
public String hello(@RequestParam String name){
return "Hello" + name;
}

@GetMapping("/hello2")
public User hello(@RequestHeader String name, @RequestHeader Integer age){
return new User(name,age);
}

@PostMapping("/hello3")
public String hello(@RequestBody User user){
return "hello"+user.getName()+","+user.getAge();
}
User实体类
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;
}
}


首先引入pom依赖

<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>
然后在application中加上如下注解:
@EnableDiscoveryClient
@EnableFeignClients

application.properties配置文件
server.port=9001
spring.application.name=feign-consumer
eureka.client.service-url.defaultZone=http://localhost:8877/eureka/,http://localhost:8898/eureka/

编写feign客户端
@FeignClient("hello-server")
public interface FeignService {

@RequestMapping("/hello")
String hello();

@GetMapping("/hello1")
String hello(@RequestParam("name") String name);

@GetMapping("/hello2")
User hello(@RequestHeader("name") String name, @RequestHeader("age") Integer age);

@PostMapping("/hello3")
String hello(@RequestBody User user);

}

控制层调用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",22).toString();
String str3 = feignService.hello(new User("goblin", 22));
return str1 + " "+ str2 +" " + str3 ;
}

}

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