HttpClient入门实例

Struts2的Action配置代码

 

 

<package name="Ajax" extends="json-default" namespace="/Ajax">
    "serivceJ" class="com.wanghe.test.TestAction" method="serivceJ" >
        "json">

package>

 

Action代码

 

 

public void serivceJ() {
        try {
    HttpServletResponse response = ServletActionContext.getResponse();
HttpServletRequest request = ServletActionContext.getRequest();
 System.out.println("request...serivceJ");
        response.setCharacterEncoding("UTF-8");
            String type = request.getParameter("type");
            String c = "none";
            if(type.equalsIgnoreCase("girl")){
                c = "女孩你好！";
            }else if(type.equalsIgnoreCase("boy")){
                c = "男孩你好！";
            }
            response.getWriter().write(c);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

 

HttpClient测试代码

 

//创建默认的httpClient实例.
HttpClient httpclient = new DefaultHttpClient();
//创建httppost
HttpPost httppost = new HttpPost("http://localhost:8080/myDemo/Ajax/serivceJ.action");
//创建参数队列
List formparams = new ArrayList();
formparams.add(new BasicNameValuePair("type", "girl"));
UrlEncodedFormEntity uefEntity;
try {
    uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");
    httppost.setEntity(uefEntity);
    System.out.println("executing request " + httppost.getURI());
    HttpResponse response;
    response = httpclient.execute(httppost);
    HttpEntity entity = response.getEntity();
    if (entity != null) {       System.out.println("--------------------------------------");
    System.out.println("Response content: " + EntityUtils.toString(entity,"UTF-8"));
System.out.println("--------------------------------------");
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        }catch(UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }catch (IOException e) {
            e.printStackTrace();
        }finally{
             //关闭连接,释放资源
            httpclient.getConnectionManager().shutdown();
        }

 

输出：

 

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