import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

public class ImageRequest{

/**

* 读取网络图片并保存至服务器硬盘中

* @param imgUrl

* @return 图片保存的服务器路径

*/

public static String getImages(String imgUrl){

String imgPath = "";

try{

//new一个URL对象

URL url = new URL(imgUrl);

//打开链接

HttpURLConnection conn = (HttpURLConnection)url.openConnection();

//设置请求方式为"GET"

conn.setRequestMethod("GET");

//超时响应时间为5秒

conn.setConnectTimeout(5 * 1000);

//通过输入流获取图片数据

InputStream inStream = conn.getInputStream();

//得到图片的二进制数据，以二进制封装得到数据，具有通用性

byte[]data = readInputStream(inStream);

imgPath = ImageRequest.class.getClassLoader().getResource("").getPath();

imgPath = imgPath.split("WEB-INF")[0];

imgPath = imgPath+"images/"+"haha.jpg";

//new一个文件对象用来保存图片，默认保存当前工程根目录

File imageFile = new File(imgPath);

//创建输出流

FileOutputStream outStream = new FileOutputStream(imageFile);

//写入数据

outStream.write(data);

//关闭输出流

outStream.close();

//服务器文件路径

imgPath = imgPath.split("WebRoot")[1];

System.out.println(imgPath);

}catch(Exception e){e.printStackTrace();}

return imgPath;

}

/**

* 读取文件流

* @param inStream

* @return

* @throws Exception

*/

public static byte[] readInputStream(InputStream inStream) throws Exception{

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

//创建一个Buffer字符串

byte[] buffer = new byte[1024];

//每次读取的字符串长度，如果为-1，代表全部读取完毕

int len = 0;

//使用一个输入流从buffer里把数据读取出来

while( (len=inStream.read(buffer)) != -1 ){

//用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度

outStream.write(buffer, 0, len);

}

//关闭输入流

inStream.close();

//把outStream里的数据写入内存

return outStream.toByteArray();

}

public static void main(String[] args) throws Exception {

ImageRequest.getImages("http://image.meilele.com/images/201311/1385338928366387259.jpg");

}

}