如何在Java中发送HTTP请求？

本文介绍了如何在Java中发送HTTP请求？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 在Java中，如何编写HTTP请求消息并将其发送到HTTP WebServer？ 您可以使用 java.net.HttpUrlConnection 。 示例（ from here ），并加以改进。包含在链接的情况下： public static String executePost（String targetURL，String urlParameters）{ HttpURLConnection connection =空值; 尝试{ //创建连接 URL url = new URL（targetURL）; connection =（HttpURLConnection）url.openConnection（）; connection.setRequestMethod（POST）; connection.setRequestProperty（Content-Type，application / x-www-form-urlencoded）; connection.setRequestProperty（Content-Length， Integer.toString（urlParameters.getBytes（）。length））; connection.setRequestProperty（Content-Language，en-US）; connection.setUseCaches（false）; connection.setDoOutput（true）; $ b $ //发送请求 DataOutputStream wr = new DataOutputStream（ connection.getOutputStream（））; wr.writeBytes（urlParameters）; wr.close（）; //获取响应 InputStream is = connection.getInputStream（）; BufferedReader rd = new BufferedReader（new InputStreamReader（is））; StringBuilder response = new StringBuilder（）; //或StringBuffer，如果Java版本5+ String line; （（line = rd.readLine（））！= null）{ response.append（line）; while response.append（'\r'）; } rd.close（）; return response.toString（）; } catch（Exception e）{ e.printStackTrace（）; 返回null; } finally { if（connection！= null）{ connection.disconnect（）; } } } In Java, How to compose a HTTP request message and send it to a HTTP WebServer? 解决方案 You can use java.net.HttpUrlConnection.Example (from here), with improvements. Included in case of link rot:public static String executePost(String targetURL, String urlParameters) { HttpURLConnection connection = null; try { //Create connection URL url = new URL(targetURL); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("POST"); connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); connection.setRequestProperty("Content-Length", Integer.toString(urlParameters.getBytes().length)); connection.setRequestProperty("Content-Language", "en-US"); connection.setUseCaches(false); connection.setDoOutput(true); //Send request DataOutputStream wr = new DataOutputStream ( connection.getOutputStream()); wr.writeBytes(urlParameters); wr.close(); //Get Response InputStream is = connection.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(is)); StringBuilder response = new StringBuilder(); // or StringBuffer if Java version 5+ String line; while ((line = rd.readLine()) != null) { response.append(line); response.append('\r'); } rd.close(); return response.toString(); } catch (Exception e) { e.printStackTrace(); return null; } finally { if (connection != null) { connection.disconnect(); } }} 这篇关于如何在Java中发送HTTP请求？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！