在java中http的get和post请求

一个比较简单的工具类，不多解释了，直接上代码

package com.sharebo.util;


import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
 
/**
 * http转发工具类
 * @author 郭鹏飞
 *
 */
public class HttpUtil {
	
	/**
	 * http get请求
	 * <blockquote><pre>
	 * 返回数据拼装为String类型<p>
	 * 如果需要返回其他类型的数据，请另写方法改动
	 * </pre></blockquote>
	 * @param httpUrl
	 * @return
	 */
	public static String request_get(String httpUrl) {
	    BufferedReader reader = null;
	    String result = null;
	    StringBuffer sbf = new StringBuffer();

	    try {
	        URL url = new URL(httpUrl);
	        HttpURLConnection connection = (HttpURLConnection) url
	                .openConnection();
	        connection.setRequestMethod("GET");
	        connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
	        
	        connection.setDoOutput(true);
	        connection.setDoInput(true);
	        connection.setConnectTimeout(5000);
	        connection.setReadTimeout(20000);
	        connection.connect();
	        InputStream is = connection.getInputStream();
	        reader = new BufferedReader(new InputStreamReader(is,"UTF-8"));
	        String strRead = null;
	        while ((strRead = reader.readLine()) != null) {
	            sbf.append(strRead);
	            sbf.append("\r\n");
	        }
	        reader.close();
	        result = sbf.toString();
	    } catch (Exception e) {
	        //e.printStackTrace();
	    }
	    return result;
	}
	
	/**
	 * http post请求
	 * @param httpUrl
	 * @param httpArg
	 * @return
	 */
	public static String request_post(String httpUrl, String httpArg) {
	    BufferedReader reader = null;
	    String result = null;
	    StringBuffer sbf = new StringBuffer();

	    try {
	        URL url = new URL(httpUrl);
	        HttpURLConnection connection = (HttpURLConnection) url
	                .openConnection();
	        connection.setRequestMethod("POST");
	        connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
	        
	        connection.setDoOutput(true);
	        connection.setDoInput(true);
	        connection.setConnectTimeout(5000);
	        connection.setReadTimeout(20000);
	        connection.getOutputStream().write(httpArg.getBytes("UTF-8"));
	        connection.connect();
	        InputStream is = connection.getInputStream();
	        reader = new BufferedReader(new InputStreamReader(is,"UTF-8"));
	        String strRead = null;
	        while ((strRead = reader.readLine()) != null) {
	            sbf.append(strRead);
	            sbf.append("\r\n");
	        }
	        reader.close();
	        result = sbf.toString();
	    } catch (Exception e) {
	        e.printStackTrace();
	    }
	    return result;
	}
}