JAVA后台调用接口并得到返回值

java后台实现用URL调用别人的接口，并且得到接口返回的值

//参数jsonStr是内容，path接口url地址public String sendPost(String jsonStr, String path) throws IOException {byte[] data = jsonStr.getBytes();java.net.URL url = new java.net.URL(path);java.net.HttpURLConnection conn = (java.net.HttpURLConnection) url.openConnection();conn.setRequestMethod("POST");conn.setConnectTimeout(5 * 1000);// 设置连接超时时间为5秒conn.setReadTimeout(20 * 1000);// 设置读取超时时间为20秒// 使用 URL 连接进行输出，则将 DoOutput标志设置为 trueconn.setDoOutput(true);conn.setRequestProperty("Content-Type", "text/xml;charset=UTF-8");// conn.setRequestProperty("Content-Encoding","gzip");conn.setRequestProperty("Content-Length", String.valueOf(data.length));OutputStream outStream = conn.getOutputStream();// 返回写入到此连接的输出流outStream.write(data);outStream.close();// 关闭流String msg = "";// 保存调用http服务后的响应信息// 如果请求响应码是200，则表示成功if (conn.getResponseCode() == 200) {// HTTP服务端返回的编码是UTF-8,故必须设置为UTF-8,保持编码统一,否则会出现中文乱码BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));msg = in.readLine();in.close();}conn.disconnect();// 断开连接return msg;}