package com.Action;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

public class HttpUtils {

public static final String URL_PATH = "http://cs.pulaipuwang.com/yesilovepjustdoit2014/PartnerImg/1401125174761qiang.jpg";        //实例图片，实际开发中可能是获得server上的全部图片，或者部分图片，不可能是详细某一张图片

 public HttpUtils() {

   // TODO Auto-generated constructor stub

 }

 //把从server获得图片的输入流InputStream写到本地磁盘

 public  static void saveImageToDisk() {

   InputStream inputStream = getInputStream();

   byte[] data = new byte[1024];

   int len = 0;

   FileOutputStream fileOutputStream = null;

   try {

     fileOutputStream = new FileOutputStream("F:\\test2.jpg");

     while ((len = inputStream.read(data)) != -1) {

       fileOutputStream.write(data, 0, len);

     }

   } catch (IOException e) {

     // TODO Auto-generated catch block

     e.printStackTrace();

   } finally {

     if (inputStream != null) {

       try {

         inputStream.close();

       } catch (IOException e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

       }

     }

     if (fileOutputStream != null) {

       try {

         fileOutputStream.close();

       } catch (IOException e) {

         // TODO Auto-generated catch block

         e.printStackTrace();

       }

     }

   }

 }

 // 从server获得一个输入流(本例是指从server获得一个image输入流)

 public static  InputStream getInputStream() {

   InputStream inputStream = null;

   HttpURLConnection httpURLConnection = null;

   try {

     URL url = new URL(URL_PATH);

     httpURLConnection = (HttpURLConnection) url.openConnection();

     // 设置网络连接超时时间

     httpURLConnection.setConnectTimeout(3000);

     // 设置应用程序要从网络连接读取数据

     httpURLConnection.setDoInput(true);

     httpURLConnection.setRequestMethod("GET");

     int responseCode = httpURLConnection.getResponseCode();

     if (responseCode == 200) {

       // 从server返回一个输入流

       inputStream = httpURLConnection.getInputStream();

       System.out.println(inputStream+"**********************");

     }

   } catch (MalformedURLException e) {

     // TODO Auto-generated catch block

     e.printStackTrace();

   } catch (IOException e) {

     // TODO Auto-generated catch block

     e.printStackTrace();

   }

   return inputStream;

 }

 public static void main(String args[]) {

   // 从server端获得图片。保存到本地

//    saveImageToDisk();

 File file= new File("C://Program Files//Apache Software Foundation//Tomcat 6.0//webapps//plpwmanagers//DpImg//");    //得到server上DpImg文件下全部图片

 String test[];

 test=file.list();          //将每张图片依次存放到 test 数组中

 

 System.out.println(test.length);

 for(int i=0;i<test.length;i++)

 {

 System.out.println(test[i]);

 }

 }

}