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);

    }

}
巴特西

Http请求工具类 httputil

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