Java微信公众平台开发（8） 多媒体消息回复

#获取token的urltokenUrl=https://api.weixin.qq.com/cgi-bin/token#永久多媒体文件上传urlmediaUrl=http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token=

package com.cuiyongzhi.wechat.util; 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 java.util.Iterator; import java.util.Map;  import javax.activation.MimetypesFileTypeMap;import com.cuiyongzhi.web.util.GlobalConstants; /** * ClassName: HttpPostUploadUtil * @Description: 多媒体上传 * @author dapengniao * @date 2016年3月14日 上午11:56:55 */public class HttpPostUploadUtil {      public String urlStr;      public HttpPostUploadUtil(){    urlStr = "http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token="+GlobalConstants.getInterfaceUrl("access_token")+"&type=image";   }            /**    * 上传图片    *    * @param urlStr    * @param textMap    * @param fileMap    * @return    */   @SuppressWarnings("rawtypes")  public String formUpload(Map<String, String> textMap,       Map<String, String> fileMap) {     String res = "";     HttpURLConnection conn = null;     String BOUNDARY = "---------------------------123821742118716"; //boundary就是request头和上传文件内容的分隔符     try {       URL url = new URL(urlStr);       conn = (HttpURLConnection) url.openConnection();       conn.setConnectTimeout(5000);       conn.setReadTimeout(30000);       conn.setDoOutput(true);       conn.setDoInput(true);       conn.setUseCaches(false);       conn.setRequestMethod("POST");       conn.setRequestProperty("Connection", "Keep-Alive");       conn           .setRequestProperty("User-Agent",               "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");       conn.setRequestProperty("Content-Type",           "multipart/form-data; boundary=" + BOUNDARY);         OutputStream out = new DataOutputStream(conn.getOutputStream());       // text       if (textMap != null) {         StringBuffer strBuf = new StringBuffer();         Iterator<?> iter = textMap.entrySet().iterator();         while (iter.hasNext()) {           Map.Entry entry = (Map.Entry) iter.next();           String inputName = (String) entry.getKey();           String inputValue = (String) entry.getValue();           if (inputValue == null) {             continue;           }           strBuf.append("/r/n").append("--").append(BOUNDARY).append(               "/r/n");           strBuf.append("Content-Disposition: form-data; name=/""               + inputName + "/"/r/n/r/n");           strBuf.append(inputValue);         }         out.write(strBuf.toString().getBytes());       }         // file       if (fileMap != null) {         Iterator<?> iter = fileMap.entrySet().iterator();         while (iter.hasNext()) {           Map.Entry entry = (Map.Entry) iter.next();           String inputName = (String) entry.getKey();           String inputValue = (String) entry.getValue();           if (inputValue == null) {             continue;           }           File file = new File(inputValue);           String filename = file.getName();           String contentType = new MimetypesFileTypeMap()               .getContentType(file);           if (filename.endsWith(".jpg")) {             contentType = "image/jpg";           }           if (contentType == null || contentType.equals("")) {             contentType = "application/octet-stream";           }             StringBuffer strBuf = new StringBuffer();           strBuf.append("/r/n").append("--").append(BOUNDARY).append(               "/r/n");           strBuf.append("Content-Disposition: form-data; name=/""               + inputName + "/"; filename=/"" + filename               + "/"/r/n");           strBuf.append("Content-Type:" + contentType + "/r/n/r/n");             out.write(strBuf.toString().getBytes());             DataInputStream in = new DataInputStream(               new FileInputStream(file));           int bytes = 0;           byte[] bufferOut = new byte[1024];           while ((bytes = in.read(bufferOut)) != -1) {             out.write(bufferOut, 0, bytes);           }           in.close();         }       }         byte[] endData = ("/r/n--" + BOUNDARY + "--/r/n").getBytes();       out.write(endData);       out.flush();       out.close();         // 读取返回数据       StringBuffer strBuf = new StringBuffer();       BufferedReader reader = new BufferedReader(new InputStreamReader(           conn.getInputStream()));       String line = null;       while ((line = reader.readLine()) != null) {         strBuf.append(line).append("/n");       }       res = strBuf.toString();       reader.close();       reader = null;     } catch (Exception e) {       System.out.println("发送POST请求出错。" + urlStr);       e.printStackTrace();     } finally {       if (conn != null) {         conn.disconnect();         conn = null;       }     }     return res;   }   }

String openid = map.get("FromUserName"); // 用户openidString mpid = map.get("ToUserName"); // 公众号原始IDImageMessage imgmsg = new ImageMessage();imgmsg.setToUserName(openid);imgmsg.setFromUserName(mpid);imgmsg.setCreateTime(new Date().getTime());imgmsg.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_Image);if (map.get("Event").equals(MessageUtil.EVENT_TYPE_SUBSCRIBE)) { // 关注事件  System.out.println("==============这是关注事件！");  Image img = new Image();  HttpPostUploadUtil util=new HttpPostUploadUtil();  String filepath="H://1.jpg";   Map<String, String> textMap = new HashMap<String, String>();   textMap.put("name", "testname");   Map<String, String> fileMap = new HashMap<String, String>();   fileMap.put("userfile", filepath);   String mediaidrs = util.formUpload(textMap, fileMap);  System.out.println(mediaidrs);  String mediaid=JSONObject.fromObject(mediaidrs).getString("media_id");  img.setMediaId(mediaid);  imgmsg.setImage(img);  return MessageUtil.imageMessageToXml(imgmsg);}