Java 使用JSoup从HTML中提取图像类型
如何使用JSoup从url提取图像类型?我正在解析一个html,它可以发送图像url(使用asbUrl()。但是,我需要测试它的类型。现在它使所有内容都变成了.png,这显然不适用于大多数类型。有什么想法吗?首先将图像保存到文件中。 这里有一些代码可以帮助您做到这一点:Java 使用JSoup从HTML中提取图像类型,java,html,jsoup,Java,Html,Jsoup,如何使用JSoup从url提取图像类型?我正在解析一个html,它可以发送图像url(使用asbUrl()。但是,我需要测试它的类型。现在它使所有内容都变成了.png,这显然不适用于大多数类型。有什么想法吗?首先将图像保存到文件中。 这里有一些代码可以帮助您做到这一点: public class DownloadImages { //The url of the website. This is just an example private static final Stri
public class DownloadImages {
//The url of the website. This is just an example
private static final String webSiteURL = "http://www.supercars.net/gallery/119513/2841/5.html";
//The path of the folder that you want to save the images to
private static final String folderPath = "<FOLDER PATH>";
public static void main(String[] args) {
try {
//Connect to the website and get the html
Document doc = Jsoup.connect(webSiteURL).get();
//Get all elements with img tag ,
Elements img = doc.getElementsByTag("img");
for (Element el : img) {
//for each element get the srs url
String src = el.absUrl("src");
System.out.println("Image Found!");
System.out.println("src attribute is : "+src);
getImages(src);
}
} catch (IOException ex) {
System.err.println("There was an error");
Logger.getLogger(DownloadImages.class.getName()).log(Level.SEVERE, null, ex);
}
}
private static void getImages(String src) throws IOException {
String folder = null;
//Exctract the name of the image from the src attribute
int indexname = src.lastIndexOf("/");
if (indexname == src.length()) {
src = src.substring(1, indexname);
}
indexname = src.lastIndexOf("/");
String name = src.substring(indexname, src.length());
System.out.println(name);
//Open a URL Stream
URL url = new URL(src);
InputStream in = url.openStream();
OutputStream out = new BufferedOutputStream(new FileOutputStream( folderPath+ name));
for (int b; (b = in.read()) != -1;) {
out.write(b);
}
out.close();
in.close();
}
完成后,还可以使用Java删除这些文件
我不确定如何直接从URL获取扩展名您是否打算使用el.attr(“src”)而不是absUrl?
String extension = FilenameUtils.getExtension("/path/to/file/image.png");