package com.expai.utils;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;import java.util.List;import java.util.Map;import org.apache.log4j.Logger;public class HttpEmbed {    private static final Logger log = Logger.getLogger(HttpEmbed.class);    /**     * 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;        String urlNameString=null;        try {            if(param==null){                 urlNameString = url;            }else{                 urlNameString = url + "?" + param;            }            log.info("url==========================="+urlNameString);            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。     * @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            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", "text/xml; charset=utf-8");            // 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            log.info("post url==========================="+url+"?"+param);            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) {        String str = HttpEmbed.sendGet("http://42.121.1.151:9000/hotimage", "callback=jsonp3&action=pagingImageNew&number=50&categoryId=chinayes.com&pageNum=0");        System.out.println("============="+str);    }    public static String httpPost(String url, String sb ) {        URL u = null;        HttpURLConnection con = null;        //构建请求参数        /*StringBuffer sb = new StringBuffer();        if(params!=null){            for (Entry<String, String> e : params.entrySet()) {            sb.append(e.getKey());            sb.append("=");            sb.append(e.getValue());            sb.append("&");            }            sb.substring(0, sb.length() - 1);        }*/        System.out.println("send_url:"+url);        System.out.println("send_data:"+sb);        //尝试发送请求        try {            u = new URL(url);            con = (HttpURLConnection) u.openConnection();            con.setRequestMethod("POST");            con.setDoOutput(true);            con.setDoInput(true);            con.setUseCaches(false);            con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");            OutputStreamWriter osw = new OutputStreamWriter(con.getOutputStream(), "UTF-8");            osw.write(sb);            osw.flush();            osw.close();        } catch (Exception e) {            e.printStackTrace();        } finally {            if (con != null) {                con.disconnect();            }        }                 //读取返回内容        //StringBuffer buffer = new StringBuffer();        try {            BufferedReader br = new BufferedReader(new InputStreamReader(con                    .getInputStream(), "UTF-8"));        String temp;        /*while ((temp = br.readLine()) != null) {        buffer.append(temp);        buffer.append("\n");        }*/        } catch (Exception e) {        e.printStackTrace();        }                 return "";        }         }