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");
}
}