java - HtmlUnit 2.9 jar 执行 JavaScript

Question

我正在尝试这段代码：

import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.JavaScriptPage;
import com.gargoylesoftware.htmlunit.ScriptResult;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.WebRequest;
import com.gargoylesoftware.htmlunit.WebResponse;
import com.gargoylesoftware.htmlunit.WebWindow;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine;
import com.gargoylesoftware.htmlunit.javascript.host.html.HTMLScriptElement;
import java.net.URL;
import java.util.List;

public class Example {

    public static void main(String[] args) throws Exception {

        WebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER_6);
        URL url=new URL("http://www.google.com");
        WebRequest request= new WebRequest(url);
        WebResponse response=new WebResponse(null, request, 6000);
        webClient.setJavaScriptEnabled(true);
        webClient.setThrowExceptionOnScriptError(false);
        webClient.setCssEnabled(false);

        webClient.setRedirectEnabled(true);

        JavaScriptEngine engine = new JavaScriptEngine(webClient);
        webClient.setJavaScriptEngine(engine);
        HtmlPage firstPage = null;
        ScriptResult result = null;
        JavaScriptPage jsp=new JavaScriptPage(response, null);
        try {
            firstPage = webClient.getPage(request);
        } catch (Exception e) {
            e.printStackTrace();
        }
        String JavaScriptCode = "1+1";

        try {
           result = firstPage.executeJavaScript(JavaScriptCode);

        } catch (Exception e) {
            e.printStackTrace();
        }
        Object javaScriptResult = result.getJavaScriptResult();
        System.out.println(javaScriptResult);
    }
}

它适用于简单的 JavaScript 代码，例如"1+1". 我想执行在 URL 的页面源中定义的特定功能。URL 是我在此代码中定义的字段。

Answer 1

这是一个工作示例，我试图使其尽可能简单：

import com.gargoylesoftware.htmlunit.BrowserVersion;
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;

public class Test {
    public static void main(String[] args) throws Exception {

       WebClient webClient = new WebClient(BrowserVersion.FIREFOX_3_6);

       HtmlPage page = webClient.getPage("http://www.iana.org/");
       String javaScriptCode = "inArray([1,2],3)";

       Object result = page.executeJavaScript(javaScriptCode).getJavaScriptResult();
       System.out.println(result);
    }
}