URLConnection读写(备忘)

private String DoPostCmd(String strURL, String req) {
       
		String result = null;
		try {
			URL url = new URL(strURL);
			URLConnection con = url.openConnection();
			con.setUseCaches(true);
			con.setDoInput(true);
			con.setDoOutput(true);
			BufferedOutputStream out = new BufferedOutputStream(con.getOutputStream());
			byte outBuf[] = req.getBytes("GB2312");
			out.write(outBuf);
			out.close();
			BufferedInputStream in = new BufferedInputStream(con.getInputStream());
			result = ReadByteStream(in);
			in.close();
		} catch (IOException ex) {
			result = "";
			
		} catch (Exception ex) {
			result = "";
		}
		return (result == null ? "" : result);
	}

 

	private static String ReadByteStream(BufferedInputStream in) throws IOException {
		LinkedList bufList = new LinkedList();
		int size = 0;
		byte buf[];
		do {
			buf = new byte[128];
			int num = in.read(buf);
			if (num == -1)
				break;
			size += num;
			bufList.add(new mybuf(buf, num));
		} while (true);
		buf = new byte[size];
		int pos = 0;
		for (ListIterator p = bufList.listIterator(); p.hasNext();) {
			mybuf b = (mybuf) p.next();
			int i = 0;
			while (i < b.size) {
				buf[pos] = b.buf[i];
				i++;
				pos++;
			}
		}

		return new String(buf, "GB2312");
	}