java实现上传网络图片到微信服务器

java实现上传网络图片到微信服务器

package org.afuos.playcontrol.service; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; import java.io.*; import java.net.HttpURLConnection; import java.net.URL; /** * Created by Mohon on 2017/8/10. */ public class UploadPicToWx { /** * 网络图片上传到微信服务器 * * @param urlPath 图片路径 * @return JSONObject * @throws Exception */ public String getMediaIdFromUrl(String urlPath, String fileType) throws Exception { String result = null; String url = "http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token= Access_token &type=" + fileType + ""; String fileName = urlPath.substring(urlPath.lastIndexOf("/") + 1); // 获取网络图片 URL mediaUrl = new URL(urlPath); HttpURLConnection meidaConn = (HttpURLConnection) mediaUrl.openConnection(); meidaConn.setDoOutput(true); meidaConn.setRequestMethod("GET"); /** * 第一部分 */ URL urlObj = new URL(url); HttpURLConnection con = (HttpURLConnection) urlObj.openConnection(); con.setRequestMethod("POST"); // 以Post方式提交表单，默认get方式 con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); // post方式不能使用缓存 // 设置请求头信息 con.setRequestProperty("Connection", "Keep-Alive"); con.setRequestProperty("Charset", "UTF-8"); // 设置边界 String BOUNDARY = "----------" + System.currentTimeMillis(); con.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY); // 请求正文信息 // 第一部分： StringBuilder sb = new StringBuilder(); sb.append("--"); // 必须多两道线 sb.append(BOUNDARY); sb.append("\r\n"); sb.append("Content-Disposition: form-data;name=\"media\";filename=\"" + fileName + "\"\r\n"); sb.append("Content-Type:application/octet-stream\r\n\r\n"); byte[] head = sb.toString().getBytes("utf-8"); // 获得输出流 OutputStream out = new DataOutputStream(con.getOutputStream()); // 输出表头 out.write(head); // 文件正文部分 // 把文件已流文件的方式 推入到url中 DataInputStream in = new DataInputStream(meidaConn.getInputStream()); int bytes = 0; byte[] bufferOut = new byte[1024]; while ((bytes = in.read(bufferOut)) != -1) { out.write(bufferOut, 0, bytes); } in.close(); // 结尾部分 byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定义最后数据分隔线 out.write(foot); out.flush(); out.close(); meidaConn.disconnect(); StringBuffer buffer = new StringBuffer(); BufferedReader reader = null; try { // 定义BufferedReader输入流来读取URL的响应 reader = new BufferedReader(new InputStreamReader(con.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { buffer.append(line); } if (result == null) { result = buffer.toString(); } } catch (IOException e) { log.info("发送POST请求出现异常！ {}", e); e.printStackTrace(); throw new IOException("数据读取异常"); } finally { if (reader != null) { reader.close(); } } JSONObject jsonObj = JSON.parseObject(result); log.info("getMediaId jsonObj: {}", jsonObj); return jsonObj.getString("media_id"); } }

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