Java 通过设置Referer反盗链

package .searchphoto.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java..URL;
import java..URLConnection;
import java.util.zip.GZIPInputStream;
/
下载远程网站的图片，通过设置Referer反反盗链。

@author JAVA世纪网(java2000., laozizhu.)
/
public class ImageDownloader {
/
下载文件到指定位置
@param imgurl 下载连接
@param f 目标文件
@return 成功返回文件，失败返回null
/
public static File download(String imgurl, File f) {
try {
URL url = new URL(imgurl);
URLConnection con = url.openConnection();
int index = imgurl.indexOf("/", 10);
con.setRequestProperty("Host", index == -1 ? imgurl.substring(7) : imgurl.substring(7, index));
con.setRequestProperty("Referer", imgurl);
InputStream is = con.getInputStream();
if (con.getContentEncoding() != null && con.getContentEncoding().equalsIgnoreCase("gzip")) {
is = new GZIPInputStream(con.getInputStream());
}
byte[] bs = new byte[1024];
int len = -1;
OutputStream os = new FileOutputStream(f);
try {
while ((len = is.read(bs)) != -1) {
os.write(bs, 0, len);
}
} finally {
try {
os.close();
} catch (Exception ex) {}
try {
is.close();
} catch (Exception ex) {}
}
return f;
} catch (Exception ex) {
ex.printStackTrace();
return null;
}
}
}