Java微信公众平台开发(七)--多媒体消息回复之图片回复

1 #获取token的url
2 tokenUrl=https://api.weixin.qq.com/cgi-bin/token
3 #永久多媒体文件上传url
4 mediaUrl=http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token=

  1 package com.gede.wechat.util;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.DataInputStream;
  5 import java.io.DataOutputStream;
  6 import java.io.File;
  7 import java.io.FileInputStream;
  8 import java.io.InputStreamReader;
  9 import java.io.OutputStream;
 10 import java.net.HttpURLConnection;
 11 import java.net.URL;
 12 import java.util.Iterator;
 13 import java.util.Map;
 14 
 15 import javax.activation.MimetypesFileTypeMap;
 16 
 17 import com.gede.web.util.GlobalConstants;
 18 
 19 /**
 20  * @author gede
 21  * @version date：2019年5月26日 下午8:47:28
 22  * @description ：
 23  */
 24 public class HttpPostUploadUtil {
 25 
 26     public String urlStr;
 27 
 28     public HttpPostUploadUtil() {
 29         urlStr = "http://file.api.weixin.qq.com/cgi-bin/media/upload?access_token="
 30                 + GlobalConstants.getInterfaceUrl("access_token") + "&type=image";
 31     }
 32 
 33     /**
 34      * 上传图片
 35      * 
 36      * @param urlStr
 37      * @param textMap
 38      * @param fileMap
 39      * @return
 40      */
 41     @SuppressWarnings("rawtypes")
 42     public String formUpload(Map<String, String> textMap, Map<String, String> fileMap) {
 43         String res = "";
 44         HttpURLConnection conn = null;
 45         String BOUNDARY = "---------------------------123821742118716"; // boundary就是request头和上传文件内容的分隔符
 46         try {
 47             URL url = new URL(urlStr);
 48             conn = (HttpURLConnection) url.openConnection();
 49             conn.setConnectTimeout(5000);
 50             conn.setReadTimeout(30000);
 51             conn.setDoOutput(true);
 52             conn.setDoInput(true);
 53             conn.setUseCaches(false);
 54             conn.setRequestMethod("POST");
 55             conn.setRequestProperty("Connection", "Keep-Alive");
 56             conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
 57             conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
 58 
 59             OutputStream out = new DataOutputStream(conn.getOutputStream());
 60             // text
 61             if (textMap != null) {
 62                 StringBuffer strBuf = new StringBuffer();
 63                 Iterator<?> iter = textMap.entrySet().iterator();
 64                 while (iter.hasNext()) {
 65                     Map.Entry entry = (Map.Entry) iter.next();
 66                     String inputName = (String) entry.getKey();
 67                     String inputValue = (String) entry.getValue();
 68                     if (inputValue == null) {
 69                         continue;
 70                     }
 71                     strBuf.append("\r\n").append("--").append(BOUNDARY).append("\r\n");
 72                     strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"\r\n\r\n");
 73                     strBuf.append(inputValue);
 74                 }
 75                 out.write(strBuf.toString().getBytes());
 76             }
 77 
 78             // file
 79             if (fileMap != null) {
 80                 Iterator<?> iter = fileMap.entrySet().iterator();
 81                 while (iter.hasNext()) {
 82                     Map.Entry entry = (Map.Entry) iter.next();
 83                     String inputName = (String) entry.getKey();
 84                     String inputValue = (String) entry.getValue();
 85                     if (inputValue == null) {
 86                         continue;
 87                     }
 88                     File file = new File(inputValue);
 89                     String filename = file.getName();
 90                     String contentType = new MimetypesFileTypeMap().getContentType(file);
 91                     if (filename.endsWith(".jpg")) {
 92                         contentType = "image/jpg";
 93                     }
 94                     if (contentType == null || contentType.equals("")) {
 95                         contentType = "application/octet-stream";
 96                     }
 97 
 98                     StringBuffer strBuf = new StringBuffer();
 99                     strBuf.append("\r\n").append("--").append(BOUNDARY).append("\r\n");
100                     strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"; filename=\"" + filename
101                             + "\"\r\n");
102                     strBuf.append("Content-Type:" + contentType + "\r\n\r\n");
103 
104                     out.write(strBuf.toString().getBytes());
105 
106                     DataInputStream in = new DataInputStream(new FileInputStream(file));
107                     int bytes = 0;
108                     byte[] bufferOut = new byte[1024];
109                     while ((bytes = in.read(bufferOut)) != -1) {
110                         out.write(bufferOut, 0, bytes);
111                     }
112                     in.close();
113                 }
114             }
115 
116             byte[] endData = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();
117             out.write(endData);
118             out.flush();
119             out.close();
120 
121             // 读取返回数据
122             StringBuffer strBuf = new StringBuffer();
123             BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
124             String line = null;
125             while ((line = reader.readLine()) != null) {
126                 strBuf.append(line).append("\n");
127             }
128             res = strBuf.toString();
129             reader.close();
130             reader = null;
131         } catch (Exception e) {
132             System.out.println("发送POST请求出错。" + urlStr);
133             e.printStackTrace();
134         } finally {
135             if (conn != null) {
136                 conn.disconnect();
137                 conn = null;
138             }
139         }
140         return res;
141     }
142 
143 }

 1 String openid = map.get("FromUserName"); // 用户openid
 2 String mpid = map.get("ToUserName"); // 公众号原始ID
 3 ImageMessage imgmsg = new ImageMessage();
 4 imgmsg.setToUserName(openid);
 5 imgmsg.setFromUserName(mpid);
 6 imgmsg.setCreateTime(new Date().getTime());
 7 imgmsg.setMsgType(MessageUtil.RESP_MESSAGE_TYPE_Image);
 8 if (map.get("Event").equals(MessageUtil.EVENT_TYPE_SUBSCRIBE)) { // 关注事件
 9     System.out.println("==============这是关注事件！");
10     Image img = new Image();
11     HttpPostUploadUtil util=new HttpPostUploadUtil();
12     String filepath="H:\\1.jpg";  
13     Map<String, String> textMap = new HashMap<String, String>();  
14     textMap.put("name", "testname");  
15     Map<String, String> fileMap = new HashMap<String, String>();  
16     fileMap.put("userfile", filepath); 
17     String mediaidrs = util.formUpload(textMap, fileMap);
18     System.out.println(mediaidrs);
19     String mediaid=JSONObject.fromObject(mediaidrs).getString("media_id");
20     img.setMediaId(mediaid);
21     imgmsg.setImage(img);
22     return MessageUtil.imageMessageToXml(imgmsg);
23 }