httpclient3.1简单使用

1.httpclient采用的maven依赖

<dependency>  <groupId>commons-httpclient</groupId>  <artifactId>commons-httpclient</artifactId>  <version>3.1</version></dependency>

2.使用步骤

新建一个 HttpClient对象，作为客户端

新建请求方法对象，比如GetMethod 或 PostMethod

客户端执行所创建的GetMethod或PostMethod

获取返回的数据

释放连接

3.代码展示

public static void main(String[] args) {HttpClient httpClient = new HttpClient(); //创建客户端String url ="http://news.163.com/16/0602/10/BOI4LUB400014PRF.html";       GetMethod getMethod = new GetMethod(url);         try {             int statusCode = httpClient.executeMethod(getMethod);             if (statusCode != HttpStatus.SC_OK) {  //执行成功的标示状态               System.err.println("Method failed: "                         + getMethod.getStatusLine());             }             // 读取内容             byte[] responseBody = getMethod.getResponseBody();            // String res = getMethod.getResponseBodyAsString();          /*                     //Post                    PostMethod postMethod = new PostMethod(url);           httpClient.executeMethod(postMethod);           System.out.println(postMethod.getResponseBodyAsString());*/          处理内容            String html = new String(responseBody);                      System.out.printlin(html);       } catch (Exception e) {             System.err.println("页面无法访问");         }finally{  //无论成功与否都要释放连接        getMethod.releaseConnection();      }  }