public static String sendMessage(String xml, String urlpath) { String msg = ""; OutputStreamWriter wr = null; BufferedReader rd = null; HttpURLConnection conn = null; try { URL url = new URL(urlpath); conn = (HttpURLConnection) url.openConnection(); conn.setConnectTimeout(10000); conn.setReadTimeout(10000); conn.setDoInput(true); conn.setDoOutput(true); conn.setUseCaches(false); conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Accept-Charset", "utf-8"); wr = new OutputStreamWriter(conn.getOutputStream(), "utf-8"); wr.write(xml); wr.flush(); rd = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8")); String line; while ((line = rd.readLine()) != null) { msg = msg + line; } } catch (Exception e) { e.printStackTrace(); } finally { try { if (wr != null) wr.close(); if (rd != null) rd.close(); if (conn != null) conn.disconnect(); } catch (Exception e) { } } return msg; } 用上面的代码可以了，我之前遇到这个问题，

我也遇到同样的问题，真是吐血，用main方法没问题，一到程序里面就不行了问题返回也是正常的