JAVA NET 发送HTTP请求

/**
 * 
 */
package car.web.task.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.log4j.Logger;

/**
 * @author Administrator iParking 2012-3-16
 */
public class HttpUtil {

	public static void doGet(String webUrl,String param,String paraValue)  {
		Logger log=Logger.getLogger(HttpUtil.class);
		StringBuilder sb = new StringBuilder();
		
		
		try {
			paraValue = java.net.URLEncoder.encode(paraValue, "utf-8");
		} catch (UnsupportedEncodingException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		

		String http = webUrl+param+paraValue;
		System.out.println("-----------------" + http);
		log.warn(http);
		HttpURLConnection urlConnection=null;
		try {
			URL url = new URL(http);
			 urlConnection = (HttpURLConnection) url.openConnection();// 打开url连接
			urlConnection.setDoInput(true);
			urlConnection.setRequestMethod("GET");
			urlConnection.setConnectTimeout(10000);
			urlConnection.setReadTimeout(10000);
			urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0");
			// 打开到此URL引用的资源通信链接
			urlConnection.connect();
			
			
			//获取动态链接响应的状态码
			int HttpResult =urlConnection.getResponseCode();
			if(HttpResult ==HttpURLConnection.HTTP_OK){
				BufferedReader br = new BufferedReader(new InputStreamReader(
						urlConnection.getInputStream(),"utf-8"));
				String line = null;
				while ((line = br.readLine()) != null) {
					sb.append(line + "\n");
				}
				br.close();
				
					System.out.println("返回内容：" + sb.toString());
				
			}else{
				log.warn(urlConnection.getResponseMessage());
			}
		} catch (MalformedURLException e) {
			
			e.printStackTrace();
		}
		catch (IOException e) {
			
			e.printStackTrace();
		}finally{
			if(urlConnection!=null)
				   urlConnection.disconnect();
		}

	}

	public static void doPost(String webUrl,String paraValue) {
		Logger log=Logger.getLogger(HttpUtil.class);
		StringBuilder sb = new StringBuilder();
		
		String http = webUrl;
		//System.out.println("-----------------" + http+"?"+param);
		log.warn(http+"?"+paraValue);
		HttpURLConnection urlConnection=null;
		try {
			URL url = new URL(http);
			 urlConnection = (HttpURLConnection) url
					.openConnection();// 打开url连接
			urlConnection.setDoOutput(true);
			urlConnection.setDoOutput(true);
			urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0");
			urlConnection.setRequestMethod("POST");
			urlConnection.setUseCaches(false);
			urlConnection.setConnectTimeout(10000);
			urlConnection.setReadTimeout(10000);
			urlConnection.setRequestProperty("Content-Type","application/x-www-form-urlencoded"); 
			// 打开到此URL引用的资源通信链接
			urlConnection.connect();
			OutputStream os = urlConnection.getOutputStream();
			os.write(paraValue.getBytes("utf-8"));
			os.close();
			
			//获取动态链接响应的状态码
			int HttpResult =urlConnection.getResponseCode();
			if(HttpResult ==HttpURLConnection.HTTP_OK){
				BufferedReader br = new BufferedReader(new InputStreamReader(
						urlConnection.getInputStream(),"utf-8"));
				String line = null;
				while ((line = br.readLine()) != null) {
					sb.append(line + "\n");
				}
				br.close();
				
					System.out.println("返回内容：" + sb.toString());
				
			}else{
				log.warn(urlConnection.getResponseMessage());
			}
		} catch (MalformedURLException e) {
			
			e.printStackTrace();
		}
		catch (IOException e) {
			
			e.printStackTrace();
		}finally{
			if(urlConnection!=null)
			   urlConnection.disconnect();
		}

	}
}