HTMLUNIT运行不好

Question

我下载了所有必要的jars，并运行了以下测试程序：

public void getElements() throws Exception {
final WebClient webClient = new WebClient();
final HtmlPage page = webClient.getPage("https://www.facebook.com/");
final HtmlDivision div = page.getHtmlElementById("_li");
//final HtmlAnchor anchor = page.getAnchorByName("anchor_name");

webClient.closeAllWindows();

}但每次都会因为错误退出:דצמ09,2014

2:04:10 PM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify

WARNING: Obsolete content type encountered: 'application/x-javascript'.

דצמ 09, 2014 2:04:11 PM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify

WARNING: Obsolete content type encountered: 'application/x-javascript'.

Exception in thread "main" com.gargoylesoftware.htmlunit.ElementNotFoundException: elementName=[*] attributeName=[id] attributeValue=[_li]

    at com.gargoylesoftware.htmlunit.html.HtmlPage.getElementById(HtmlPage.java:1729)

    at com.gargoylesoftware.htmlunit.html.HtmlPage.getHtmlElementById(HtmlPage.java:1679)

    at DmozSpider.main(DmozSpider.java:16)

Answer 1

在队伍中

page.getHtmlElementById("_li");

代码抛出一个ElementNotFoundException，因为DOM没有任何id为"_li“的XML元素。正如Javadoc of ElementNotFoundException所说的：

当在DOM模型中找不到指定的XML元素时引发的异常。

如果您希望使用class="_li"选择一个div标记，那么您应该使用

page.getByXPath("//div[@class='_li']");