使用HttpClient发送GET请求和带有表单参数的POST请求

http://blog.csdn.net/jadyer/article/details/7615830

 

 

package
 com.jadyer.util;

import
 java.io.IOException;
import
 java.io.UnsupportedEncodingException;
import
 java.util.ArrayList;
import
 java.util.List;

import
 org.apache.http.HttpEntity;
import
 org.apache.http.HttpResponse;
import
 org.apache.http.NameValuePair;
import
 org.apache.http.ParseException;
import
 org.apache.http.client.ClientProtocolException;
import
 org.apache.http.client.HttpClient;
import
 org.apache.http.client.entity.UrlEncodedFormEntity;
import
 org.apache.http.client.methods.HttpGet;
import
 org.apache.http.client.methods.HttpPost;
import
 org.apache.http.impl.client.DefaultHttpClient;
import
 org.apache.http.message.BasicNameValuePair;
import
 org.apache.http.util.EntityUtils;

/**
 * 使用HttpClient模拟HTTP访问
 * @see ===============================================================================================================================
 * @see HttpClient代表了一个HTTP客户端,HttpClient接口中定义了大多数基本的HTTP请求执行行为
 * @see HttpEntity是发送或接收消息的载体,它可以通过HttpResponse.getEntity()获取到
 * @see HttpConnection代表了一个HTTP连接
 * @see ===============================================================================================================================
 * @author http://blog.csdn.net/jadyer
 * @editor Feb 1, 2012 3:02:27 PM
 */
public
 
class
 HttpClientUtil {
    public
 
static
 
void
 main(String[] args)
throws
 Exception{
        //String requestUrl = "http://123.125.97.xxx:8804/ecpaycus/test/JFB_web_visit.jsp?phoneNo=18600000001";
        //System.out.println(sendGetRequest(requestUrl));
        String requestUrl = "http://127.0.0.1:8088/test/web/userac"
;
        System.out.println(sendPostRequest(requestUrl));
    }

    /**
     * 发送GET请求
     * @param requestUrl 请求的地址(含参数)
     * @return 响应内容
     */
    @SuppressWarnings
(
"finally"
)
    public
 
static
 String sendGetRequest(String requestUrl) {
        long
 responseLength = 
0
;       
//响应长度
        String responseContent = null
; 
//响应内容
        HttpClient httpClient = new
 DefaultHttpClient(); 
//创建默认的httpClient实例
        HttpGet httpGet = new
 HttpGet(requestUrl);       
//创建HttpGet
        try
 {
            HttpResponse response = httpClient.execute(httpGet); //执行GET请求
            HttpEntity entity = response.getEntity();            //获取响应实体
            if
 (
null
 != entity) {
                responseLength = entity.getContentLength();
                responseContent = EntityUtils.toString(entity, "UTF-8"
);
                EntityUtils.consume(entity); //Consume response content
            }
            System.out.println("请求地址: "
 + httpGet.getURI());
            System.out.println("响应状态: "
 + response.getStatusLine());
            System.out.println("响应长度: "
 + responseLength);
            System.out.println("响应内容: "
 + responseContent);
        } catch
 (ClientProtocolException e) {
            //该异常通常是协议错误导致
            //比如构造HttpGet对象时传入的协议不对(将"http"写成"htp")或者服务器端返回的内容不符合HTTP协议要求等
            e.printStackTrace();
        } catch
 (ParseException e) {
            e.printStackTrace();
        } catch
 (IOException e) {
            //该异常通常是网络原因引起的,如HTTP服务器未启动等
            e.printStackTrace();
        } finally
 {
            httpClient.getConnectionManager().shutdown(); //关闭连接，释放资源
            return
 responseContent;
        }
    }

    /**
     * 发送带有表单参数的POST请求
     * @param requestUrl 请求的地址(不含参数)
     * @return 响应内容
     */
    @SuppressWarnings
(
"finally"
)
    public
 
static
 String sendPostRequest(String requestUrl) {
        long
 responseLength = 
0
;       
//响应长度
        String responseContent = null
; 
//响应内容
        HttpClient httpClient = new
 DefaultHttpClient();                 
//创建默认的httpClient实例
        HttpPost httpPost = new
 HttpPost(requestUrl);                    
//创建HttpPost
        List<NameValuePair> formParams = new
 ArrayList<NameValuePair>(); 
//创建参数队列
        formParams.add(new
 BasicNameValuePair(
"username"
, 
"jadyer"
));
        formParams.add(new
 BasicNameValuePair(
"password"
, 
"hongyu"
));
        try
 {
            httpPost.setEntity(new
 UrlEncodedFormEntity(formParams, 
"UTF-8"
));
            HttpResponse response = httpClient.execute(httpPost); //执行POST请求
            HttpEntity entity = response.getEntity();             //获取响应实体
            if
 (
null
 != entity) {
                responseLength = entity.getContentLength();
                responseContent = EntityUtils.toString(entity, "UTF-8"
);
                EntityUtils.consume(entity); //Consume response content
            }
            System.out.println("请求地址: "
 + httpPost.getURI());
            System.out.println("响应状态: "
 + response.getStatusLine());
            System.out.println("响应长度: "
 + responseLength);
            System.out.println("响应内容: "
 + responseContent);
        } catch
 (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch
 (ClientProtocolException e) {
            e.printStackTrace();
        } catch
 (ParseException e) {
            e.printStackTrace();
        } catch
 (IOException e) {
            e.printStackTrace();
        } finally
 {
            httpClient.getConnectionManager().shutdown(); //关闭连接，释放资源
            return
 responseContent;
        }
    }
}