实现Http的Post、Get、代理访问请求代码,Java代码库,德仔网

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【Java】实现Http的Post、Get、代理访问请求
作者:teardream / 发布于2015/1/12/ 460
Java实现Http的访问请求。包含基本的Get访问、Post访问。Post包含使用代理模式访问

	package com.snowfigure.kits.net;
	
	import java.io.BufferedReader;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.InputStreamReader;
	import java.io.OutputStreamWriter;
	import java.io.UnsupportedEncodingException;
	import java.net.HttpURLConnection;
	import java.net.InetSocketAddress;
	import java.net.Proxy;
	import java.net.URL;
	import java.net.URLConnection;
	import java.util.List;
	import java.util.Map;
	
	/**
	* Http请求工具类
	* @author snowfigure
	* @since 2014-8-24 13:30:56
	* @version v1.0.1
	*/
	public class HttpRequestUtil {
	 static boolean proxySet = false;
	 static String proxyHost = "127.0.0.1";
	 static int proxyPort = 8087;
	 /**
	 * 编码
	 * @param source
	 * @return
	 */
	 public static String urlEncode(String source,String encode) {
	 String result = source;
	 try {
	 result = java.net.URLEncoder.encode(source,encode);
	 } catch (UnsupportedEncodingException e) {
	 e.printStackTrace();
	 return "0";
	 }
	 return result;
	 }
	 public static String urlEncodeGBK(String source) {
	 String result = source;
	 try {
	 result = java.net.URLEncoder.encode(source,"GBK");
	 } catch (UnsupportedEncodingException e) {
	 e.printStackTrace();
	 return "0";
	 }
	 return result;
	 }
	 /**
	 * 发起http请求获取返回结果
	 * @param req_url 请求地址
	 * @return
	 */
	 public static String httpRequest(String req_url) {
	 StringBuffer buffer = new StringBuffer();
	 try {
	 URL url = new URL(req_url);
	 HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
	
	 httpUrlConn.setDoOutput(false);
	 httpUrlConn.setDoInput(true);
	 httpUrlConn.setUseCaches(false);
	
	 httpUrlConn.setRequestMethod("GET");
	 httpUrlConn.connect();
	
	 // 将返回的输入流转换成字符串
	 InputStream inputStream = httpUrlConn.getInputStream();
	 InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
	 BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
	
	 String str = null;
	 while ((str = bufferedReader.readLine()) != null) {
	 buffer.append(str);
	 }
	 bufferedReader.close();
	 inputStreamReader.close();
	 // 释放资源
	 inputStream.close();
	 inputStream = null;
	 httpUrlConn.disconnect();
	
	 } catch (Exception e) {
	 System.out.println(e.getStackTrace());
	 }
	 return buffer.toString();
	 }
	
	 /**
	 * 发送http请求取得返回的输入流
	 * @param requestUrl 请求地址
	 * @return InputStream
	 */
	 public static InputStream httpRequestIO(String requestUrl) {
	 InputStream inputStream = null;
	 try {
	 URL url = new URL(requestUrl);
	 HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();
	 httpUrlConn.setDoInput(true);
	 httpUrlConn.setRequestMethod("GET");
	 httpUrlConn.connect();
	 // 获得返回的输入流
	 inputStream = httpUrlConn.getInputStream();
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 return inputStream;
	 }
	
	
	 /**
	 * 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.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()));
	 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。
	 * @param isproxy
	 * 是否使用代理模式
	 * @return 所代表远程资源的响应结果
	 */
	 public static String sendPost(String url, String param,boolean isproxy) {
	 OutputStreamWriter out = null;
	 BufferedReader in = null;
	 String result = "";
	 try {
	 URL realUrl = new URL(url);
	 HttpURLConnection conn = null;
	 if(isproxy){//使用代理模式
	 @SuppressWarnings("static-access")
	 Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort));
	 conn = (HttpURLConnection) realUrl.openConnection(proxy);
	 }else{
	 conn = (HttpURLConnection) realUrl.openConnection();
	 }
	 // 打开和URL之间的连接
	
	 // 发送POST请求必须设置如下两行
	 conn.setDoOutput(true);
	 conn.setDoInput(true);
	 conn.setRequestMethod("POST"); // POST方法
	
	
	 // 设置通用的请求属性
	
	 conn.setRequestProperty("accept", "*/*");
	 conn.setRequestProperty("connection", "Keep-Alive");
	 conn.setRequestProperty("user-agent",
	 "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
	 conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
	
	 conn.connect();
	
	 // 获取URLConnection对象对应的输出流
	 out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
	 // 发送请求参数
	 out.write(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 void main(String[] args) {
	 //demo:代理访问
	 String url = "http://api.adf.ly/api.php";
	 String para = "key=youkeyid&youuid=uid&advert_type=int&domain=adf.ly&url=http://somewebsite.com";
	
	 String sr=HttpRequestUtil.sendPost(url,para,true);
	 System.out.println(sr);
	 }
	
	}
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　Post　　代理访问请求　
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