import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;

import net.sf.json.JSONObject;
/**
 * 發起http請求並獲取結果 
 * @author zyz
 * @date 20140522
 *
 */
public class HttpRequestUtil {
	/** 
     * 發起http請求並獲取結果 
     *  
     * @param requestUrl 請求地址 
     * @param requestMethod 請求方式（GET、POST） 
     * @param outputStr 提交的資料 
     * @return JSONObject(通過JSONObject.get(key)的方式獲取json物件的屬性值) 
     */  
    public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {  
        JSONObject jsonObject = null;  
        StringBuffer buffer = new StringBuffer();
        InputStream inputStream=null;
        try {
            URL url = new URL(requestUrl);
            HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();  
            httpUrlConn.setDoOutput(true);  
            httpUrlConn.setDoInput(true);  
            httpUrlConn.setUseCaches(false);
            // 設定請求方式（GET/POST）  
            httpUrlConn.setRequestMethod(requestMethod);  
            if ("GET".equalsIgnoreCase(requestMethod))  
                httpUrlConn.connect();  
  
            // 當有資料需要提交時  
            if (null != outputStr) {  
                OutputStream outputStream = httpUrlConn.getOutputStream();  
                // 注意編碼格式，防止中文亂碼  
                outputStream.write(outputStr.getBytes("UTF-8"));  
                outputStream.close();  
            }
            //將返回的輸入流轉換成字串  
            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();  
            // 釋放資源  
            inputStream.close();  
            inputStream = null;  
            httpUrlConn.disconnect();  
          jsonObject = JSONObject.fromObject(buffer.toString());
        } catch (ConnectException ce) {  
              ce.printStackTrace();
              System.out.println("Weixin server connection timed out");
        } catch (Exception e) {  
        	   e.printStackTrace();
        	   System.out.println("http request error:{}");
        }finally{
    		try {
    			if(inputStream!=null){
    				inputStream.close();
    			}
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
        } 
        return jsonObject;  
    }  

}