微信企业号上传媒体文件之本地文件上传

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：

实现方法一：

<span style="font-size:14px;">package org.oms.qiye;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
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";
</span><span style="font-size:14px;">
     public static JSONObject upload(String accessToken, String type, File file) {
		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 url = new URL(last_wechat_url);
			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setUseCaches(false);
			conn.setRequestMethod("POST");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
			conn.setRequestProperty("Charsert", "UTF-8");
			conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);

			OutputStream out = new DataOutputStream(conn.getOutputStream());
			byte[] end_data = ("\r\n--" + boundary + "--\r\n").getBytes();// 定义最后数据分隔线
			StringBuilder sb = new StringBuilder();
			sb.append("--");
			sb.append(boundary);
			sb.append("\r\n");
			sb.append("Content-Disposition: form-data;name=\"media\";filename=\"" + file.getName() + "\"\r\n");
			sb.append("Content-Type:application/octet-stream\r\n\r\n");

			byte[] data = sb.toString().getBytes();
			out.write(data);
			DataInputStream in = new DataInputStream(new FileInputStream(file));
			int bytes = 0;
			byte[] bufferOut = new byte[1024 * 8];
			while ((bytes = in.read(bufferOut)) != -1) {
				out.write(bufferOut, 0, bytes);
			}
			out.write("\r\n".getBytes()); // 多个文件时，二个文件之间加入这个
			in.close();
			out.write(end_data);
			out.flush();
			out.close();

			// 定义BufferedReader输入流来读取URL的响应
			BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
			String line = null;
			StringBuffer buffer = new StringBuffer();
			while ((line = reader.readLine()) != null) {
				buffer.append(line);
			}
			// 使用json解析
			jsonObject = JSONObject.fromObject(buffer.toString());
			System.out.println(jsonObject);

		} catch (Exception e) {
			System.out.println("发送POST请求出现异常！" + e);
			e.printStackTrace();
		}
		return jsonObject;
	}
}
</span>

实现方法二：

<span style="font-size:14px;">package org.oms.qiye;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
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, File file) {
		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();

			// 从请求头中获取内容类型
			String contentType = "Content-Type: " + getContentType();
			// 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", file.getName()).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）
			DataInputStream in = new DataInputStream(new FileInputStream(file));
			byte[] buf = new byte[1024 * 8];
			int size = 0;
			while ((size = in.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();
			in.close();

			// 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;
	}

	// 获取文件的上传类型，图片格式为image/png,image/jpeg等。非图片为application /octet-stream
	private static String getContentType() throws Exception {
		return "application/octet-stream";
	}

}
</span>

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微信企业号上传媒体文件之本地文件上传