public boolean post(String username, String password) throws Exception {username = URLEncoder.encode(username);// 中文数据需要经过URL编码password = URLEncoder.encode(password);String params = "username=" + username + "&password=" + password; byte[] data = params.getBytes();URL url = new URL(address);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setConnectTimeout(3000);//这是请求方式为POSTconn.setRequestMethod("POST");//设置post请求必要的请求头conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 请求头, 必须设置conn.setRequestProperty("Content-Length", data.length + "");// 注意是字节长度, 不是字符长度conn.setDoOutput(true);// 准备写出conn.getOutputStream().write(data);// 写出数据return conn.getResponseCode() == 200;}