[Java] 使用okhttp替换Feign默认Client的操作

<dependencies>
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <!-- Spring Cloud OpenFeign的Starter的依赖 -->
 <dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-openfeign</artifactId>
 </dependency>
 <dependency>
  <groupId>io.github.openfeign</groupId>
  <artifactId>feign-okhttp</artifactId>
 </dependency>
</dependencies>

server:
 port: 8011
spring:
 application:
 name: ch4-3-okhttp
 
feign:
 httpclient:
   enabled: false
 okhttp:
   enabled: true

<dependency>
 <groupId>io.github.openfeign</groupId>
 <artifactId>feign-core</artifactId>
 <version>9.7.0</version>
</dependency>
<dependency>
 <groupId>io.github.openfeign</groupId>
 <artifactId>feign-gson</artifactId>
 <version>9.7.0</version>
</dependency>

（1） http://localhost:8080/user/{userid}

（2） http://localhost:8080/login/{username}/{password}

package com.crazymakercircle.imServer.feignClient;
import feign.Param;
import feign.RequestLine;
public interface UserAction
{
 @RequestLine("GET /login/{username}/{password}")
 public String loginAction(
   @Param("username") String username,
   @Param("password") String password);
 @RequestLine("GET /user/{userid}")
 public String getById(
   @Param("userid") Integer userid);
}

import com.crazymakercircle.imServer.feignClient.UserAction;
import feign.Feign;
import feign.Request;
import feign.Retryer;
import feign.codec.StringDecoder;
import org.junit.Test;
/**
 * Created by 尼恩 at 疯狂创客圈
 */
//@ContextConfiguration(
//  locations = { "classpath:application.properties" })
//@RunWith(SpringJUnit4ClassRunner.class)
//@Configuration
//自动加载配置信息
//@EnableAutoConfiguration
public class LoginActionTest
{
/* // 服务器ip地址
 @Value("${server.web.user.url}")
 private String userBase;*/
 @Test
 public void testLogin()
 {
  UserAction action = Feign.builder()
//  .decoder(new GsonDecoder())
  .decoder(new StringDecoder())
  .options(new Request.Options(1000, 3500))
  .retryer(new Retryer.Default(5000, 5000, 3))
  .target(
    UserAction.class,
//    userBase
    "http://localhost:8080/"
  );
  String s = action.loginAction(
  "zhangsan",
  "zhangsan"
  );
  System.out.println("s = " + s);
 }
 @Test
 public void testGetById()
 {
  UserAction action = Feign.builder()
//  .decoder(new GsonDecoder())
  .decoder(new StringDecoder())
  .target(
    UserAction.class,
    "http://localhost:8080/"
  );
  String s = action.getById(2);
  System.out.println("s = " + s);
 }
}