一篇请求都是不会自动加载 js 可以使用 webCinet 方法就你能异步加载，最终把数据加载完毕。

     <!-- https://mvnrepository.com/artifact/net.sourceforge.htmlunit/htmlunit -->
        <dependency>
            <groupId>net.sourceforge.htmlunit</groupId>
            <artifactId>htmlunit</artifactId>
            <version>2.62.0</version>
        </dependency>

异步加载方法

public static String getPageWaitHtmlResults(String url) {
        WebClient webClient = new WebClient();
        //启用JS解释器，默认为true
        webClient.getOptions().setJavaScriptEnabled(true);
        //禁用css支持
        webClient.getOptions().setCssEnabled(false);
        //js运行错误时，是否抛出异常
        webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);
        webClient.getOptions().setThrowExceptionOnScriptError(false);
        webClient.getOptions().setTimeout(300000);
        webClient.getOptions().setActiveXNative(false);
        webClient.getOptions().setUseInsecureSSL(false);
        ////很重要，设置支持AJAX
        webClient.setAjaxController(new NicelyResynchronizingAjaxController());
        webClient.addRequestHeader("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9");
        webClient.addRequestHeader("user-agent", "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1");
        HtmlPage page = null;
        try {
            page = webClient.getPage(url);
        } catch (IOException e) {
//            e.printStackTrace();
            log.error("数据异常 {}", e.getMessage());
        } finally {

        }
        webClient.waitForBackgroundJavaScript(3 * 1000);
        //以xml的形式获取响应文本
        String pageXml = page.asXml();
        return pageXml;
    }

通过上面就异步把数据加载下来