java 发送http请求post get

package com.wcg.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class HttpUtil {
	/**
	 * 向指定URL发送GET方法的请求
	 * 
	 * @param url
	 *            发送请求的URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return URL 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param) {
		String result = "";
		BufferedReader in = null;
		try {
			String urlNameString = url + "?" + param;
			URL realUrl = new URL(urlNameString);
			// 打开和URL之间的连接
			URLConnection connection = realUrl.openConnection();
			// 设置通用的请求属性
			connection.setConnectTimeout(60000);
			// 建立实际的连接
			connection.connect();
			// 定义 BufferedReader输入流来读取URL的响应
			in = new BufferedReader(new InputStreamReader(connection
					.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送GET请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输入流
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, String param) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			URLConnection conn = realUrl.openConnection();
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setConnectTimeout(60000);
			// 获取URLConnection对象对应的输出流
			out = new PrintWriter(conn.getOutputStream());
			// 发送请求参数
			out.print(param);
			// flush输出流的缓冲
			out.flush();
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
					new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("发送 POST 请求出现异常！" + e);
			e.printStackTrace();
		}
		// 使用finally块来关闭输出流、输入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}

	public static String getUrlDecode(String str) {
		String res = null;
		try {
			res = URLEncoder.encode(str, "utf-8");
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return res;
	}

	public static void main(String[] args) {
		//
		String partnerKey = "123123";
		// 合作平台编号4
		String uid = "1040";
		// 合作平台订单号3
		String orderid = "201406191527326";
		// 充值账号1
		String account_val = "626659";
		// 2
		String companyid = "148";
		//
		String enshrin = "account_val" + "626659" + "companyid" + "148"
				+ "orderid" + "201406191527326" + "uid" + "1040" + partnerKey;

		String sign = MD5.GetMD5Code(enshrin);

		String param = "account_val=" + getUrlDecode(account_val)
				+ "&companyid=" + getUrlDecode(companyid) + "&orderid="
				+ getUrlDecode(orderid) + "&uid=" + getUrlDecode(uid)
				+ "&sign=" + sign;
		// 发送 GET 请求
		System.out.println(param);
		String s = HttpUtil.sendGet(PropertiesUtil.getArrearsUrl(), param);
		System.out.println(s);
		
		String enshrin2 = "money" + "50" 
		+ "orderid" + "201406191527326" + "uid" + "1040" + partnerKey;
		String sign2 = MD5.GetMD5Code(enshrin2);
		String param2 ="money=50&orderid=201406191527326&uid=1040&sign="+sign2;
		System.out.println(param2);
		String s2 = HttpUtil.sendGet(PropertiesUtil.getTransUrl(), param2);
		System.out.println(s2);
	}

}