HttpClient如何进行表单提交呢?
转自:
http://www.java265.com/JavaCourse/202204/2937.html
HttpClient是一个java语言编写的包,
我们使用HttpClient可以非常方便的发送Http请求
它使基于Http协议请求内容变得非常简单
HttpClient是Apache Jakarta Common下的子项目 它里面封装了很多使用http协议访问的工具,可用于高效访问http
下文笔者讲述基于HttpClient Utils工具类编写一个表单提交的示例分享,如下所示:
HttpClient Utils进行表单提交同post提交的方式一摸一样,如下所示 实现思路: 1.获取连接 2.声明一个HttpPost 3.创建请求参数体 4.execute获取信息 5.getEntity获取返回信息 6.关闭连接
/** * post方式提交表单(模拟用户登录请求) */ public void postForm() { // 创建默认的httpClient实例. CloseableHttpClient httpclient = HttpClients.createDefault(); // 创建httppost HttpPost httppost = new HttpPost("http://java265.com/login"); // 创建参数队列 List<NameValuePair> formparams = new ArrayList<NameValuePair>(); formparams.add(new BasicNameValuePair("username", "admin")); formparams.add(new BasicNameValuePair("password", "java265.compwd")); UrlEncodedFormEntity uefEntity; try { uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8"); httppost.setEntity(uefEntity); System.out.println("executing request " + httppost.getURI()); CloseableHttpResponse response = httpclient.execute(httppost); try { HttpEntity entity = response.getEntity(); if (entity != null) { System.out.println("--------------------------------------"); System.out.println("Response content: " + EntityUtils.toString(entity, "UTF-8")); System.out.println("--------------------------------------"); } } finally { response.close(); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e1) { e1.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { // 关闭连接,释放资源 try { httpclient.close(); } catch (IOException e) { e.printStackTrace(); } } }