微信企业号上传媒体文件之服务器文件上传

5.读取上传文件后微信服务器返回的内容，并用json解析并返回（定义BufferedReader输入流来读取URL的响应）

具体实现代码：

package org.oms.qiye;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import net.sf.json.JSONObject;

public class WXUpload {
	private static final String upload_wechat_url = "https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=TYPE";
	public static JSONObject upload(String accessToken, String type, String fileUrl) {
		JSONObject jsonObject = null;
		String last_wechat_url = upload_wechat_url.replace("ACCESS_TOKEN", accessToken).replace("TYPE", type);
		// 定义数据分割符
		String boundary = "----------sunlight";
		try {
			URL uploadUrl = new URL(last_wechat_url);
			HttpURLConnection uploadConn = (HttpURLConnection) uploadUrl.openConnection();
			uploadConn.setDoOutput(true);
			uploadConn.setDoInput(true);
			uploadConn.setRequestMethod("POST");
			// 设置请求头Content-Type
			uploadConn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
			// 获取媒体文件上传的输出流（往微信服务器写数据）
			OutputStream outputStream = uploadConn.getOutputStream();

			URL mediaUrl = new URL(fileUrl);
			HttpURLConnection meidaConn = (HttpURLConnection) mediaUrl.openConnection();
			meidaConn.setDoOutput(true);
			meidaConn.setRequestMethod("GET");

			// 从请求头中获取内容类型
			String contentType = meidaConn.getHeaderField("Content-Type");
			String filename=getFileName(fileUrl,contentType);
			// 请求体开始
			outputStream.write(("--" + boundary + "\r\n").getBytes());
			outputStream.write(String.format("Content-Disposition: form-data; name=\"media\"; filename=\"%s\"\r\n", filename).getBytes());
			outputStream.write(String.format("Content-Type: %s\r\n\r\n", contentType).getBytes());

			// 获取媒体文件的输入流（读取文件）
			BufferedInputStream bis = new BufferedInputStream(meidaConn.getInputStream());
			byte[] buf = new byte[1024 * 8];
			int size = 0;
			while ((size = bis.read(buf)) != -1) {
				// 将媒体文件写到输出流（往微信服务器写数据）
				outputStream.write(buf, 0, size);
			}
			// 请求体结束
			outputStream.write(("\r\n--" + boundary + "--\r\n").getBytes());
			outputStream.close();
			bis.close();
			meidaConn.disconnect();

			// 获取媒体文件上传的输入流（从微信服务器读数据）
			InputStream inputStream = uploadConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
			StringBuffer buffer = new StringBuffer();
			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			uploadConn.disconnect();
			// 使用json解析
			jsonObject = JSONObject.fromObject(buffer.toString());
			System.out.println(jsonObject);
		} catch (Exception e) {
			System.out.println("上传文件失败！");
			e.printStackTrace();
		}
		return jsonObject;
	}

	public static String getFileName(String fileUrl,String contentType) {
		String filename="";
		if (fileUrl != null && !"".equals(fileUrl)) {
			if(fileUrl.contains(".")){
				filename = fileUrl.substring(fileUrl.lastIndexOf("/") + 1);
			}else{
				if(contentType==null || "".equals(contentType)){
					return "";
				}
				String fileExt="";
				if ("image/jpeg".equals(contentType)) {
					fileExt = ".jpg";
				} else if ("audio/mpeg".equals(contentType)) {
					fileExt = ".mp3";
				} else if ("audio/amr".equals(contentType)) {
					fileExt = ".amr";
				} else if ("video/mp4".equals(contentType)) {
					fileExt = ".mp4";
				} else if ("video/mpeg4".equals(contentType)) {
					fileExt = ".mp4";
				} else if ("text/plain".equals(contentType)) {
					fileExt = ".txt";
				} else if ("text/xml".equals(contentType)) {
					fileExt = ".xml";
				} else if ("application/pdf".equals(contentType)) {
					fileExt = ".pdf";
				} else if ("application/msword".equals(contentType)) {
					fileExt = ".doc";
				} else if ("application/vnd.ms-powerpoint".equals(contentType)) {
					fileExt = ".ppt";
				} else if ("application/vnd.ms-excel".equals(contentType)) {
					fileExt = ".xls";
				}
				filename="Media文件"+fileExt;
			}
		}
		return filename;
	}
}

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微信企业号上传媒体文件之服务器文件上传