htmlunit爬取js异步加载后的页面

直接上代码：

一、 index.html
调用后台请求获取content中的内容。

<html>
<head>
    <script type="text/javascript" src="./jquery.min.js"></script>
</head>
<body>
<h2>Hello World!</h2>
<div id="content"></div>
<script type="text/javascript">
$(document).ready(function(){
      $.post("/evh/test/testList",{},function(data){
          $("#content").text(JSON.stringify(data));
      }); 
});
</script>
</body>
</html>

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二、TestController.java
/test/testList接口从后台数据库获取数据。

package com.everhomes.proxy.controller;

import javax.annotation.Resource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.everhomes.proxy.mapper.TestMapper;

@RestController
@RequestMapping("/test")
public class TestController {
    private static final Logger logger = LoggerFactory.getLogger(TestController.class);

    @Resource
    private TestMapper testMapper;

    @RequestMapping("testList")
    public Object testList(){
        return testMapper.testList();
    };

    @ExceptionHandler(Exception.class)
    public Object exception(Exception e){
        logger.error("error: ", e);
        return "error: " + e.toString();
    }
}

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三、Crawler.java

package com.everhomes.generate;

import java.io.IOException;

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

public class Crawler {
    public static void main(String[] args) throws IOException, InterruptedException {
        WebClient webClient = new WebClient(BrowserVersion.CHROME);  
            webClient.getOptions().setJavaScriptEnabled(true);
            webClient.getOptions().setCssEnabled(false);
            webClient.getOptions().setRedirectEnabled(true);
            webClient.getOptions().setThrowExceptionOnScriptError(false);
            webClient.getOptions().setTimeout(50000);
            HtmlPage rootPage = webClient.getPage("http://localhost:8080/evh/index.html");  
            webClient.waitForBackgroundJavaScript(10000);

            FileUtils.createFile(DIRECTORY+"cc.html", rootPage.asXml());
            webClient.close();
    }
}

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四、pom.xml
添加相关依赖。


    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.6</version>
    </dependency>
    <dependency> 
            <groupId>net.sourceforge.htmlunit</groupId> 
            <artifactId>htmlunit-core-js</artifactId> 
            <version>2.23</version> 
    </dependency> 
    <dependency> 
            <groupId>net.sourceforge.htmlunit</groupId> 
            <artifactId>htmlunit</artifactId> 
            <version>2.25</version> 
    </dependency>

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原文地址：https://www.cnblogs.com/telwanggs/p/6878599.html