Forest - 轻量级HTTP客户端框架

<dependency>
    <groupId>com.dtflys.forest</groupId>
    <artifactId>spring-boot-starter-forest</artifactId>
    <version>1.4.12</version>
</dependency>

package com.yoursite.client;

import com.dtflys.forest.annotation.Request;
import com.dtflys.forest.annotation.DataParam;

public interface AmapClient {

    /**
     * 聪明的你一定看出来了@Get注解代表该方法专做GET请求
     * 在url中的${0}代表引用第一个参数，${1}引用第二个参数
     */
    @Get(url = "http://ditu.amap.com/service/regeo?longitude=${0}&latitude=${1}")
    Map getLocation(String longitude, String latitude);
}

@SpringBootApplication
@Configuration
@ForestScan(basePackages = "com.yoursite.client")
public class MyApplication {
  public static void main(String[] args) {
      SpringApplication.run(MyApplication.class, args);
   }
}

// 注入接口实例
@Autowired
private AmapClient amapClient;
...
// 调用接口
Map result = amapClient.getLocation("121.475078", "31.223577");
System.out.println(result);

/**
 * 用@DataFile注解修饰要上传的参数对象
 * OnProgress参数为监听上传进度的回调函数
 */
@Post(url = "/upload")
Map upload(@DataFile("file") String filePath, OnProgress onProgress);

Map result = myClient.upload("D:\\TestUpload\\xxx.jpg", progress -> {
    System.out.println("progress: " + Math.round(progress.getRate() * 100) + "%");  // 已上传百分比
    if (progress.isDone()) {   // 是否上传完成
        System.out.println("--------   Upload Completed!   --------");
    }
});

/**
 * 在方法上加上@DownloadFile注解
 * dir属性表示文件下载到哪个目录
 * OnProgress参数为监听上传进度的回调函数
 * ${0}代表引用第一个参数
 */
@Get(url = "http://localhost:8080/images/xxx.jpg")
@DownloadFile(dir = "${0}")
File downloadFile(String dir, OnProgress onProgress);

File file = myClient.downloadFile("D:\\TestDownload", progress -> {
    System.out.println("progress: " + Math.round(progress.getRate() * 100) + "%");  // 已下载百分比
    if (progress.isDone()) {   // 是否下载完成
        System.out.println("--------   Download Completed!   --------");
    }
});