使用 jsoup 下载图片

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Pattern;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class ImgDownloader{

public void getDoc() throws IOException {
File f = new File("E:\\imgs");

if (!f.exists()) {
f.mkdirs();
}
String picUrl = "http://xxx.com/images/";
Document doc = Jsoup.connect(picUrl).get();
Elements links = doc.select("a[href]");

for (Element e : links) {

if (Pattern.matches(".*?jpe?g|png|git$", e.attr("href"))) {

String src = e.absUrl("href");

String imageName = src.substring(src.lastIndexOf("/") + 1, src.length());
URL url = new URL(src);
URLConnection uri = url.openConnection();
InputStream is = uri.getInputStream();
OutputStream os = new FileOutputStream(new File("E:/imgs/somedir", imageName));

byte[] buf = new byte[1024];
int len = -1;

while ((len = is.read(buf)) != -1) {
os.write(buf, 0, len);
}
}
}
}

public static void main(String[] args) throws IOException {
new ImgDownloader().getDoc();
}
}