HTTP请求类

package com.paytest.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;import java.util.List;import java.util.Map;public class HttpRequest { ???/** ????* 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 ???????????/** ????????????* application/x-javascript text/xml->xml数据 ????????????* application/x-javascript->json对象 ?????????????* application/x-www-form-urlencoded->表单数据 ?????????????* application/json;charset=utf-8 -> json数据 ?????????????* */ ???????????connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); ????????????connection.setRequestProperty("accept", "*/*"); ???????????connection.setRequestProperty("connection", "Keep-Alive"); ???????????connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); ???????????// 建立实际的连接 ???????????connection.connect(); ???????????// 获取所有响应头字段 ???????????Map<String, List<String>> map = connection.getHeaderFields(); ???????????// 遍历所有的响应头字段// ???????????for (String key : map.keySet()) {// ???????????????System.out.println(key + "--->" + map.get(key));// ???????????} ???????????// 定义 BufferedReader输入流来读取URL的响应 ???????????in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8")); ???????????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(); ???????????result="IO_EXCEPTION"; ???????} ???????// 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(); ???????????// 设置通用的请求属性 ???????????/** ????????????* application/x-javascript text/xml->xml数据 ????????????* application/x-javascript->json对象 ?????????????* application/x-www-form-urlencoded->表单数据(key=value&key=value...形式的数据) ????????????* application/json;charset=utf-8 -> json数据 ?????????????* */ ???????????conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); ???????????conn.setRequestProperty("accept", "*/*"); ???????????conn.setRequestProperty("connection", "Keep-Alive"); ???????????conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); ???????????// 发送POST请求必须设置如下两行 ???????????conn.setDoOutput(true); ???????????conn.setDoInput(true); ???????????// 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(), "utf-8")); ???????????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 void main(String[] args) throws UnsupportedEncodingException { ???????String s="年后FDSA你好啊"; ???????//String string = URLEncoder.encode(s, "utf-8"); ???????String string = URLEncoder.encode(s, "gbk"); ???????System.out.println(string); ???????String sr = HttpRequest.sendGet("https://127.0.0.1/pay/queryOrder", "cpid=weixing&cppwd=654321&phone=13293787666&spnumber=&msgcont="+string+"&extend=01234"); ???????System.out.println(sr); ???}}