java微信接口之三—上传多媒体文件

  1 import java.io.File;
  2 
  3 import org.apache.commons.httpclient.methods.PostMethod;
  4 import org.apache.commons.httpclient.methods.multipart.FilePart;
  5 import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;
  6 import org.apache.commons.httpclient.methods.multipart.Part;
  7 import org.apache.http.HttpEntity;
  8 import org.apache.http.HttpResponse;
  9 import org.apache.http.HttpStatus;
 10 import org.apache.http.client.HttpClient;
 11 import org.apache.http.client.methods.HttpGet;
 12 import org.apache.http.impl.client.DefaultHttpClient;
 13 import org.apache.http.util.EntityUtils;
 14 
 15 import com.google.gson.JsonObject;
 16 import com.google.gson.JsonParser;
 17 
 18 public class Test
 19 {
 20     public static final String GET_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token";// 获取access
 21     public static final String UPLOAD_IMAGE_URL = "http://file.api.weixin.qq.com/cgi-bin/media/upload";// 上传多媒体文件
 22     public static final String APP_ID = "wxa549b28c24cf341e";
 23     public static final String SECRET = "78d8a8cd7a4fa700142d06b96bf44a37";
 24 
 25     /**
 26      * 上传多媒体文件
 27      * 
 28      * @param url
 29      *            访问url
 30      * @param access_token
 31      *            access_token
 32      * @param type
 33      *            文件类型
 34      * @param file
 35      *            文件对象
 36      * @return
 37      */
 38     public static String uploadImage(String url, String access_token,
 39             String type, File file)
 40     {
 41         org.apache.commons.httpclient.HttpClient client = new org.apache.commons.httpclient.HttpClient();
 42         String uploadurl = String.format("%s?access_token=%s&type=%s", url,
 43                 access_token, type);
 44         PostMethod post = new PostMethod(uploadurl);
 45         post
 46                 .setRequestHeader(
 47                         "User-Agent",
 48                         "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0");
 49         post.setRequestHeader("Host", "file.api.weixin.qq.com");
 50         post.setRequestHeader("Connection", "Keep-Alive");
 51         post.setRequestHeader("Cache-Control", "no-cache");
 52         String result = null;
 53         try
 54         {
 55             if (file != null && file.exists())
 56             {
 57                 FilePart filepart = new FilePart("media", file, "image/jpeg",
 58                         "UTF-8");
 59                 Part[] parts = new Part[] { filepart };
 60                 MultipartRequestEntity entity = new MultipartRequestEntity(
 61                         parts,
 62 
 63                         post.getParams());
 64                 post.setRequestEntity(entity);
 65                 int status = client.executeMethod(post);
 66                 if (status == HttpStatus.SC_OK)
 67                 {
 68                     String responseContent = post.getResponseBodyAsString();
 69                     JsonParser jsonparer = new JsonParser();// 初始化解析json格式的对象
 70                     JsonObject json = jsonparer.parse(responseContent)
 71                             .getAsJsonObject();
 72                     if (json.get("errcode") == null)// {"errcode":40004,"errmsg":"invalid media type"}
 73                     { // 上传成功  {"type":"TYPE","media_id":"MEDIA_ID","created_at":123456789}
 74                         result = json.get("media_id").getAsString();
 75                     }
 76                 }
 77             }
 78         }
 79         catch (Exception e)
 80         {
 81             e.printStackTrace();
 82         }
 83         finally
 84         {
 85             return result;
 86         }
 87     }
 88 
 89     public static void main(String[] args) throws Exception
 90     {
 91         String accessToken = getToken(GET_TOKEN_URL, APP_ID, SECRET);// 获取token在微信接口之一中的方法获取token
 92         if (accessToken != null)// token成功获取
 93         {
 94             System.out.println(accessToken);
 95             File file = new File("f:" + File.separator + "2000.JPG"); // 获取本地文件
 96             String id = uploadImage(UPLOAD_IMAGE_URL, accessToken, "image",
 97                     file);// 上传文件
 98             if (id != null)
 99                 System.out.println(id);
100         }
101     }
102 
103 }