Http请求工具类 httputil

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);    }}