자바 접근 http 요청 도구 클래스

package *;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;

import net.sf.json.JSONObject;

public class HttpUtil {
    /**
     *    URL  GET     
     * 
     * @param url
     *                 URL
     * @param param
     *                ，        name1=value1&name2=value2    。
     * @return URL             
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            //    URL     
            URLConnection connection = realUrl.openConnection();
            //          
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //        
            connection.connect();
            //          
            Map> map = connection.getHeaderFields();
            //           
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            //    BufferedReader      URL   
            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("  GET      ！" + e);
            e.printStackTrace();
        }
        //   finally       
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
    
    /**
     *    URL  GET     
     * 
     * @param url
     *                 URL
     * @param param
     *                ，        name1=value1&name2=value2    。
     * @return URL             
     */
    public static JSONObject sendGetOfJson(String url, String param) {
    	StringBuffer result=new StringBuffer();
        BufferedReader in = null;
        JSONObject resultjson = null;
        try {
        	String urlNameString = url;
        	if(StringUtils.isNotBlank(param)){
        		urlNameString = urlNameString + "?" + param;
        	}
        	urlNameString.replace(" ", "%20");
            URL realUrl = new URL(toUtf8String(urlNameString));
			HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();//       
			//          
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //        
            connection.connect();
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(),"utf-8"));
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
            resultjson = JSONObject.fromObject(result.toString());
        } catch (Exception e) {
            System.out.println("  GET      ！" + e);
            e.printStackTrace();
        }
        //   finally       
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return resultjson;
    }

    /**
     *     URL   POST     
     * 
     * @param url
     *                  URL
     * @param param
     *                ，        name1=value1&name2=value2    。
     * @return             
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            //    URL     
            URLConnection conn = realUrl.openConnection();
            //          
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //   POST          
            conn.setDoOutput(true);
            conn.setDoInput(true);
            //   URLConnection        
            out = new PrintWriter(conn.getOutputStream());
            //       
            out.print(param);
            // flush      
            out.flush();
            //   BufferedReader      URL   
            in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("   POST       ！"+e);
            e.printStackTrace();
        }
        //  finally       、   
        finally{
            try{
                if(out!=null){
                    out.close();
                }
                if(in!=null){
                    in.close();
                }
            }
            catch(IOException ex){
                ex.printStackTrace();
            }
        }
        return result;
    }
    
    public static JSONObject sendPost(String urlStr,JSONObject jsonParam) {  
    	JSONObject resultjson = new JSONObject(); 
    	BufferedReader reader=null;
        try {  
            //      
            URL url = new URL(urlStr);  
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
            connection.setDoOutput(true);  
            connection.setDoInput(true);  
            connection.setRequestMethod("POST");  
            connection.setUseCaches(false);  
            connection.setInstanceFollowRedirects(true);  
            //application/x-javascript text/xml->xml   application/x-javascript->json   application/x-www-form-urlencoded->     application/json;charset=utf-8 -> json    
            connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");  
            connection.setRequestProperty("accept", "*/*");  
            connection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
            connection.connect();  
            //POST    
            DataOutputStream out = new DataOutputStream(connection.getOutputStream());  
            out.writeBytes(jsonParam.toString());  
            out.flush();  
            out.close();  
  
            //      
            reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));  
            String lines;  
            StringBuffer sb = new StringBuffer("");  
            while ((lines = reader.readLine()) != null) {  
                lines = new String(lines.getBytes(), "utf-8");  
                sb.append(lines);  
            }  
            
            resultjson = JSONObject.fromObject(sb.toString());
            System.out.println(resultjson);  
            reader.close();  
            //       
            connection.disconnect();  
        } catch (MalformedURLException e) {  
            e.printStackTrace();  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
     //   finally       
        finally {
            try {
                if (reader != null) {
                	reader.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return resultjson;
    } 
    
    
    
}