HttpClient入门实例

Struts2的Action配置代码

 

 

Java代码  

1. <package name="Ajax" extends="json-default" namespace="/Ajax">  
2.     <action name="serivceJ" class="com.wanghe.test.TestAction" method="serivceJ" >  
3.         <result  type="json"></result>  
4.     </action>  
5. </package>  

 

Action代码

 

 

Java代码  

1. public void serivceJ() {  
2.         try {  
3.     HttpServletResponse response = ServletActionContext.getResponse();   
4. HttpServletRequest request = ServletActionContext.getRequest();  
5.  System.out.println("request...serivceJ");  
6.         response.setCharacterEncoding("UTF-8");  
7.             String type = request.getParameter("type");  
8.             String c = "none";  
9.             if(type.equalsIgnoreCase("girl")){  
10.                 c = "女孩你好！";  
11.             }else if(type.equalsIgnoreCase("boy")){  
12.                 c = "男孩你好！";  
13.             }  
14.             response.getWriter().write(c);  
15.         } catch (IOException e) {  
16.             e.printStackTrace();  
17.         }  
18.     }  

 

HttpClient测试代码

 

Java代码  

1. //创建默认的httpClient实例.  
2. HttpClient httpclient = new DefaultHttpClient();  
3. //创建httppost  
4. HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");  
5. //创建参数队列  
6. List<NameValuePair> formparams = new ArrayList<NameValuePair>();  
7. formparams.add(new BasicNameValuePair("type", "girl"));  
8. UrlEncodedFormEntity uefEntity;  
9. try {  
10.     uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");  
11.     httppost.setEntity(uefEntity);  
12.     System.out.println("executing request " + httppost.getURI());  
13.     HttpResponse response;  
14.     response = httpclient.execute(httppost);  
15.     HttpEntity entity = response.getEntity();  
16.     if (entity != null) {       System.out.println("--------------------------------------");  
17.     System.out.println("Response content: " + EntityUtils.toString(entity,"UTF-8"));  
18. System.out.println("--------------------------------------");  
19.             }  
20.         } catch (ClientProtocolException e) {  
21.             e.printStackTrace();  
22.         }catch(UnsupportedEncodingException e1) {  
23.             e1.printStackTrace();  
24.         }catch (IOException e) {  
25.             e.printStackTrace();  
26.         }finally{  
27.              //关闭连接,释放资源  
28.             httpclient.getConnectionManager().shutdown();  
29.         }  

 

输出：

 

Java代码  

1. executing request http://localhost:8080/myDemo/Ajax/serivceJ.action  
2. --------------------------------------  
3. Response content: 女孩你好！  
4. --------------------------------------