示例代码：

package com.shareboxes.util;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.Map.Entry;import org.junit.Ignore;import org.junit.Test;/*** @ClassName: HttpRequest* @Description: get，post请求* @author Administrator* @date 2015年10月19日* */public class HttpRequest {    /**    * @Title: sendGet    * @Description: get请求    * @param url    * @param param     */    public static String sendGet(String url, Map
     
       param) {        BufferedReader bReader = null;        StringBuffer sBuffer = new StringBuffer();        String realUrl = url;        try {                        if (param.size() > 0) {                realUrl += "?";                for (Entry
      
        entry : param.entrySet()) {                    realUrl += entry.getKey() + "=" + entry.getValue() + "&";                }                realUrl = realUrl.substring(0, realUrl.length() - 1);            }            URL urlString = new URL(realUrl);            URLConnection urlConnection = urlString.openConnection();            HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;            httpURLConnection.setRequestMethod("GET");// 设置请求方法            httpURLConnection.setConnectTimeout(30000);// 连接主机超时时间            httpURLConnection.setReadTimeout(30000);// 读取数据超时时间            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置请求数据的格式            httpURLConnection.setRequestProperty("Connection", "Keep-Alive");            httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");// 设置接收数据的编码            // 判断连接是否异常            if (httpURLConnection.getResponseCode() >= 300) {                throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());            }                        System.out.println(httpURLConnection.getResponseCode());            for(Entry
       
        >entry:httpURLConnection.getHeaderFields().entrySet()){                System.out.println(entry.getKey()+"--------->"+entry.getValue());            }            bReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "utf-8"));            String line = null;            while ((line = bReader.readLine()) != null) {                sBuffer.append(line);            }        } catch (Exception e) {            System.out.println("get 请求发生错误!!!");            e.printStackTrace();        } finally {            if (bReader != null) {                try {                    bReader.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return sBuffer.toString();    }    /**    * @Title: sendPost    * @Description: post请求    * @param url    * @param param     */    public static String sendPost(String url, Map
        
          param) {        BufferedReader bReader = null;        OutputStreamWriter out = null;        StringBuffer sBuffer = new StringBuffer();        String parameterData ="";        try {            if (param.size() > 0) {                for (Entry
         
           entry : param.entrySet()) {                    parameterData += entry.getKey() + "=" + entry.getValue() + "&";                }                parameterData = parameterData.substring(0, parameterData.length() - 1);            }            URL realUrl = new URL(url);            HttpURLConnection httpURLConnection = (HttpURLConnection) realUrl.openConnection();            httpURLConnection.setConnectTimeout(30000);            httpURLConnection.setReadTimeout(30000);            httpURLConnection.setRequestMethod("POST");            httpURLConnection.setDoOutput(true);            httpURLConnection.setDoInput(true);            httpURLConnection.setUseCaches(false);            httpURLConnection.setInstanceFollowRedirects(true);            httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置请求参数的格式            httpURLConnection.setRequestProperty("Connection", "Keep-Alive");            httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");// 接收数据的编码                        if((parameterData.trim().length()>0) && (!parameterData.equals(""))){                out = new OutputStreamWriter(httpURLConnection.getOutputStream(), "utf-8");                out.write(parameterData);                out.flush();            }                        // 判断连接是否异常            if (httpURLConnection.getResponseCode() >= 300) {                throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());            }                        System.out.println(httpURLConnection.getResponseCode());            for(Entry
          
           >entry:httpURLConnection.getHeaderFields().entrySet()){ System.out.println(entry.getKey()+"--------->"+entry.getValue()); } // bReader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(), "utf-8"));// String line = null;// while ((line = bReader.readLine()) != null) {// sBuffer.append(line);// } InputStream in=httpURLConnection.getInputStream(); byte []data=new byte[httpURLConnection.getContentLength()]; int offset=0; while(offset
           
             param = new HashMap
            
             (); param.put("tid", "1"); System.out.println(sendGet("http://localhost:8080/shareboxes/record/getrecord/tid.do", param)); } @Test public void testPost() { Map
             
               param = new HashMap
              
               (); param.put("tid", "1"); System.out.println(sendPost("http://localhost:8080/shareboxes/record/getrecord/tid.do", param)); }}