HttpClient的使用指南

最新推荐文章于 2024-09-22 00:15:03 发布

羊之草叶

最新推荐文章于 2024-09-22 00:15:03 发布

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分类专栏：网络编程

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使用HttpClient可以在客户端发送Post请求，请求访问服务端的Servlet，依赖包httpclient和httpcore，http://hc.apache.org/httpcomponents-client-4.4.x/index.html上下载，这里所用的是httpcomponents-client-4.4.1-bin.tar.gz.

public void sendPostMethod(){  
    DefaultHttpClient httpclient = new DefaultHttpClient();  
    //参数代表目标地址  
    HttpPost httppost = new HttpPost("http://172.18.60.2:8080/MyFirstWeb/TestServlet");
        
    // HttpPost参数传递  
    List<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();  
    nvps.add(new BasicNameValuePair("user", "chris"));  
    nvps.add(new BasicNameValuePair("name", "benpaoba")); 
    nvps.add(new BasicNameValuePair("age", "25")); 
  
    try {
        httppost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
        // 执行请求
	HttpResponse response = httpclient.execute(httppost);  
	HttpEntity entity = response.getEntity();  
	if (entity != null) {  
	     System.out.println("Response content length: "  
	            + entity.getContentLength());  
	}  
	// 显示结果  
	BufferedReader reader = new BufferedReader(new InputStreamReader(  
	        entity.getContent(), "UTF-8"));
	  
	String line = null;  
	while ((line = reader.readLine()) != null) {  
	        System.out.println(line);  
	}  
	if (entity != null) {  
	    entity.consumeContent();  
	}  
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
	e.printStackTrace();
    } catch (UnsupportedOperationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        httpclient.getConnectionManager().shutdown();
    }
}