我正在做一个网络抓取项目,基本上是从Google图片中获取图片。为了获得图像src,我使用
Element.attr("href")
但是,它返回
#
我的代码
Document shivWall = Jsoup.connect(searchURL).get();
Elements smallImgElements = shivWall.getElementsByClass("rg_bx rg_di rg_el ivg-i");
smallImgElements.get(0).select("a.rg_l").get(0).attr("href");
我尝试了很多方法,但是没有一个起作用。我什至通过将attr参数更改为某个随机值来再次检查,它按预期返回null。但是,对于“ href”,它仅返回“#”。请帮忙。
答案 0 :(得分:0)
要从网站上获取标签的 src属性,您可以尝试使用以下代码段
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 html32
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();
}
}
这是使用Jsoup从网站下载图像的方法。
希望这会有所帮助。
答案 1 :(得分:0)
如果您检查通过Document shivWall = Jsoup.connect(searchURL).get();
获得的html结构,您会发现#
是href
参数的初始值。加载页面后,将使用javascript动态添加网址。 Jsoup无法处理此问题。
要获取网址,您可以使用以下代码:
for(Element e : shivWall.select(".rg_meta.notranslate")) {
Gson gson = new Gson();
Map imageData = gson.fromJson(e.text(), Map.class);
System.out.println(imageData.get("ou"));
}