java模拟浏览器上传文件 

 1 public static void main(String[] args) {
 2         String str = uploadFile("C:/Users/RGKY/Desktop/wKgBHVbLtuWAVNZAAABB_J2qzhc553.jpg", "http://localhost:8087/worldapp/fastfds/uploadSingleFile.cf?fieldName=selectFile", "wKgBHVbLtuWAVNZAAABB_J2qzhc553.jpg");
 3         System.out.println(str);
 4     }
 5 
 6     /**
 7      * 
 8      * @param file
 9      *            待上传的文件路径
10      * @param uploadUrl
11      *            上传服务接口路径
12      * @param fileName
13      *            文件名称，服务器获取的文件名称
14      * @return
15      */
16     public static String uploadFile(/* Bitmap src */String file, String uploadUrl, String fileName) {
17         String end = "\r\n";
18         String twoHyphens = "--";
19         String boundary = "******";
20         try {
21             URL url = new URL(uploadUrl);
22             HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
23             // 设置每次传输的流大小，可以有效防止手机因为内存不足崩溃
24             // 此方法用于在预先不知道内容长度时启用没有进行内部缓冲的 HTTP 请求正文的流。
25             httpURLConnection.setChunkedStreamingMode(128 * 1024);// 128K
26             // 允许输入输出流
27             httpURLConnection.setDoInput(true);
28             httpURLConnection.setDoOutput(true);
29             httpURLConnection.setUseCaches(false);
30             // 使用POST方法
31             httpURLConnection.setRequestMethod("POST");
32             httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
33             httpURLConnection.setRequestProperty("Charset", "UTF-8");
34             httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
35 
36             DataOutputStream dos = new DataOutputStream(httpURLConnection.getOutputStream());
37             dos.writeBytes(twoHyphens + boundary + end);
38             // name相当于html标签file的name属性，fileName相当于标签value值
39             dos.writeBytes("Content-Disposition: form-data;name=\"selectFile\";fileName=\"" + fileName + "\"" + end);
40             dos.writeBytes(end);
41 
42             // 将要上传的内容写入流中
43             // InputStream srcis = Function.Bitmap2IS(src);
44             InputStream srcis = new FileInputStream(file);
45             byte[] buffer = new byte[8192]; // 8k
46             int count = 0;
47             // 读取文件
48             while ((count = srcis.read(buffer)) != -1) {
49                 dos.write(buffer, 0, count);
50             }
51             srcis.close();
52 
53             dos.writeBytes(end);
54             dos.writeBytes(twoHyphens + boundary + twoHyphens + end);
55             dos.flush();
56 
57             InputStream is = httpURLConnection.getInputStream();
58             InputStreamReader isr = new InputStreamReader(is, "utf-8");
59             BufferedReader br = new BufferedReader(isr);
60             // 上传返回值
61             String sl;
62             String result = "";
63             while ((sl = br.readLine()) != null)
64                 result = result + sl;
65             br.close();
66             is.close();
67             return result;
68         } catch (Exception e) {
69             e.printStackTrace();
70             return "网络出错!";
71         }
72     }

 

posted @ 2016-02-29 14:36  べ袽猓柯苡づ  阅读(1373)  评论(0)    收藏  举报