Android笔记之HttpURLConnection上传文件到服务器

public static String uploadFile(String path, File file,
Map<String, String> map, String encode) {
String result = null;
String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成
String PREFIX = "--", LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; // 内容类型

try {
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(3000);
conn.setConnectTimeout(3000);
conn.setDoInput(true); // 允许输入流
conn.setDoOutput(true); // 允许输出流
conn.setUseCaches(false); // 不允许使用缓存
conn.setRequestMethod("POST"); // 请求方式
conn.setRequestProperty("Charset", encode); // 设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary="+ BOUNDARY);

DataOutputStream dos = new DataOutputStream(
conn.getOutputStream());

if (file != null) {
/**
* 当文件不为空，把文件包装并且上传
*/

StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINE_END);
/**
* 这里重点注意： name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
* filename是文件的名字，包含后缀名的 比如:abc.png
*/

sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""
+ file.getName() + "\"" + LINE_END);
sb.append("Content-Type: application/octet-stream; charset="
+ encode + LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len = 0;
while ((len = is.read(bytes)) != -1) {
dos.write(bytes, 0, len);
}
is.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
.getBytes();

dos.write(end_data);
dos.flush();
/**
* 获取响应码 200=成功 当响应成功，获取响应的流
*/
int res = conn.getResponseCode();
Log.e("Upload", "response code:" + res);
// if(res==200)
// {
Log.e("Upload", "request success");
InputStream input = conn.getInputStream();
StringBuffer sb1 = new StringBuffer();
int ss;
while ((ss = input.read()) != -1) {
sb1.append((char) ss);
}
result = sb1.toString();
Log.e("Upload", "result : " + result);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}

Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);
// getImage.addCategory(Intent.CATEGORY_OPENABLE);
/*
* 通过拍照获取图片 Intent getImageByCamera =
* newIntent("android.media.action.IMAGE_CAPTURE");
*/
// 通过图库选择图片
getImage.setType("image/jpeg");
startActivityForResult(getImage, 0);

........
Map<String, String> map = new HashMap<String, String>();
File f = new File(picPath);
Log.i("FileName", f.getName());
// map.put("file", picPath);
map.put("id", "0");
try {
FormFile.post(CommonUrl.Upload_URL, map, f);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
........

@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent intent) {
// TODO Auto-generated method stub
if (requestCode == 0) {
try {
uri = intent.getData();
imageView.setImageURI(uri);
Log.i("getData", intent.getData().toString());
System.out.println("requestCode=" + requestCode);
String[] pojo = { MediaStore.Images.Media.DATA };

Cursor cursor = managedQuery(uri, pojo, null, null, null);
if (cursor != null) {
System.out.println("cursor不为空！");
ContentResolver cr = this.getContentResolver();
int colunm_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path = cursor.getString(colunm_index);
/***
* 这里加这样一个判断主要是为了第三方的软件选择，比如：使用第三方的文件管理器的话，你选择的文件就不一定是图片了，
* 这样的话，我们判断文件的后缀名 如果是图片格式的话，那么才可以
*/
if (path.endsWith("jpg") || path.endsWith("png")) {
picPath = path;
Bitmap bitmap = BitmapFactory.decodeStream(cr
.openInputStream(uri));
imageView.setImageBitmap(bitmap);
} else {

}
System.out.println("picPath---" + picPath);
}
} catch (Exception e) {
System.out.println(e.getMessage());
}

} else {

}
// 把得到的图片绑定在控件上显示

}