在Java中生成混合/多部分HTTP請求

Question

我想POST（使用Java）多部分/混合請求，其中一部分是'application/json'類型，另一部分是'application/pdf'類型。有誰知道一個圖書館可以讓我輕鬆做到這一點？令人驚訝的是，我一直無法找到一個。

我將生成JSON，但我需要能夠將該部分的內容類型設置爲'application/json'。

非常感謝， 丹尼爾

Answer 1

簡單，使用Apache Http-client library（此代碼中使用版本4.1和罐子HttpClient的，的HttpCore和httpmime），這裏有一個例子：

package com.officedrop.uploader; 

import java.io.File; 
import java.net.URL; 

import org.apache.http.HttpHost; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.mime.HttpMultipartMode; 
import org.apache.http.entity.mime.MultipartEntity; 
import org.apache.http.entity.mime.content.FileBody; 
import org.apache.http.impl.client.DefaultHttpClient; 

public class SampleUploader { 

    public static void main(String[] args) throws Exception { 

     DefaultHttpClient httpclient = new DefaultHttpClient(); 
     String basePath = "http://localhost/"; 

     URL url = new URL(basePath); 

     HttpHost targetHost = new HttpHost(url.getHost(), url.getPort(), url.getProtocol()); 

     HttpPost httpost = new HttpPost(String.format("%s%s", basePath, "ze/api/documents.xml")); 

     MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); 

     entity.addPart("file_1", new FileBody(new File("path-to-file.pdf") , "file.pdf", "application/pdf", null)); 
     entity.addPart("uploaded_data_1", new FileBody(new File("path-to-file.json") , "file.json", "application/json", null));  

     httpost.setEntity(entity); 

     HttpResponse response = httpclient.execute(targetHost, httpost); 

    } 

}