Java中的HTMLUnit-如何导航到GridView页面

Question

 <a href="javascript:__doPostBack('GridView1','Page$2')" style="color:White;">2</a>

    //<![CDATA[
    var theForm = document.forms['form1'];
    if (!theForm) {
        theForm = document.form1;
    }
    function __doPostBack(eventTarget, eventArgument) {
        if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
            theForm.__EVENTTARGET.value = eventTarget;
            theForm.__EVENTARGUMENT.value = eventArgument;
            theForm.submit();
        }
    }
    //]]>

 final WebClient webClient = new WebClient(BrowserVersion.CHROME);
            HtmlPage page = webClient.getPage("http://www.webpage.com/Main.aspx");          
            HtmlAnchor anchor = null;
            List<HtmlAnchor> anchors = page.getAnchors();
            for (int j = 0; j < anchors.size(); j++)
            {
                anchor = anchors.get(j);
                String sAnchor = anchor.asText();               
                String sAnchorxml = anchor.asXml();         
                if (sAnchor.equals("2"))
                {
                    HtmlPage page2 = anchor.click();
                    doc = Jsoup.parse(page2.asXml());
                    .....

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.rangeCheck(Unknown Source)
at java.util.ArrayList.get(Unknown Source)
at test.advacus.com.MainProgram.main(MainProgram.java:148)

任何额外的帮助或任何建议的工具，而不是HTMLUnit，将更好地与jsoup合作，都将是真正有帮助的！提前感谢！

有关其他信息的编辑：看起来是click()不起作用...我修改了代码，newPage主体看起来包含了与第一页相同的信息：

final WebClient webClient = new WebClient(BrowserVersion.CHROME);       
HtmlPage page = webClient.getPage("http://www.qatarsale.com/EnMain.aspx");                  
HtmlAnchor anchor = page.getAnchorByText("2");              
HtmlPage newPage = anchor.click();      
HtmlElement el = newPage.getBody();
System.out.println(el.asText());

Answer 1

检查锚点--正如您已经指出的--调用dopostback，因此调用javascript调用要简单得多，而不是首先获取锚点并在其上调用click。

示例代码

java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(java.util.logging.Level.OFF);
final WebClient webClient = new WebClient(BrowserVersion.CHROME);

webClient.getOptions().setJavaScriptEnabled(true);
webClient.getOptions().setThrowExceptionOnScriptError(false);
webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
webClient.getOptions().setTimeout(10000);

try {
    HtmlPage htmlPage = webClient.getPage("http://qatarsale.com/EnMain.aspx");

    Document doc = Jsoup.parse(htmlPage.asXml());

    System.out.println(doc.select("[id$=Label10]").text());

    ScriptResult result = htmlPage.executeJavaScript("__doPostBack('GridView1','Page$2')");
    htmlPage = (HtmlPage)result.getNewPage();

    Thread.sleep(3000); // delay needed for lazy loading, there might be something cleaner

    doc = Jsoup.parse(((HtmlPage)htmlPage).asXml());

    System.out.println(doc.select("[id$=Label10]").text());

} catch (Exception e) {
    e.printStackTrace();
} finally {
    webClient.close();
}

输出

Toyota Porsche Mercedes-Benz Cadillac Jeep Porsche Porsche Nissan Mitsubishi BMW Porsche Ford Mitsubishi Toyota Nissan Land Rover Nissan Mercedes-Benz Nissan Nissan Toyota Toyota Porsche Mitsubishi Mitsubishi Nissan Nissan Mercedes-Benz Nissan Jeep Mercedes-Benz Lexus BMW Lexus
BMW Lexus Toyota Toyota Lexus Nissan Mercedes-Benz Mercedes-Benz Ferrari Dodge BMW Mercedes-Benz Aston Martin Mitsubishi Suzuki Maserati Porsche Maserati Land Rover Chevrolet Land Rover GMC Toyota Porsche Lexus Land Rover GMC Mercedes-Benz Toyota Lexus Toyota Lexus Toyota Nissan