Question

我正在尝试使用HtmlUnit登录网站。我正在使用以下代码登录：

try (final WebClient webClient = new WebClient()) {
            // try (final WebClient webClient = new WebClient(BrowserVersion.CHROME)) {
               final HtmlPage firstPage = webClient.getPage(link);
                // waitForBackgroundJavaScript has to be called after every action
                webClient.waitForBackgroundJavaScript(100);

最后一个HtmlPage firstPage = webClient.getPage（link）;我得到一个错误。为什么会发生？这是我收到的错误日志：

java.lang.BootstrapMethodError：调用站点＃4引导程序方法异常在com.gargoylesoftware.htmlunit.WebClient.addDefaultHeaders（WebClient.java:1496）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection（WebClient.java:1392）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponse（WebClient.java:1321）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:394）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:315）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:466）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:448）在notas.com.mistarapp.Student.login（Student.java:69）在notas.com.mistarapp.student_loading.onCreate（student_loading.java:26）在android.app.Activity.performCreate（Activity.java:7136）在android.app.Activity.performCreate（Activity.java:7127）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1271）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2893）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3048）在android.app.servertransaction.LaunchActivityItem.execute（LaunchActivityItem.java:78）在android.app.servertransaction.TransactionExecutor.executeCallbacks（TransactionExecutor.java:108）在android.app.servertransaction.TransactionExecutor.execute（TransactionExecutor.java:68）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1808）在android.os.Handler.dispatchMessage（Handler.java:106）在android.os.Looper.loop（Looper.java:193）在android.app.ActivityThread.main（ActivityThread.java:6669）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:493）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:858）原因：java.lang.ClassCastException：Bootstrap方法返回null 在com.gargoylesoftware.htmlunit.WebClient.addDefaultHeaders（WebClient.java:1496）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection（WebClient.java:1392）在com.gargoylesoftware.htmlunit.WebClient.loadWebResponse（WebClient.java:1321）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:394）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:315）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:466）在com.gargoylesoftware.htmlunit.WebClient.getPage（WebClient.java:448）在notas.com.mistarapp.Student.login（Student.java:69）在notas.com.mistarapp.student_loading.onCreate（student_loading.java:26）在android.app.Activity.performCreate（Activity.java:7136）在android.app.Activity.performCreate（Activity.java:7127）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1271）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2893）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3048）在android.app.servertransaction.LaunchActivityItem.execute（LaunchActivityItem.java:78）在android.app.servertransaction.TransactionExecutor.executeCallbacks（TransactionExecutor.java:108）在android.app.servertransaction.TransactionExecutor.execute（TransactionExecutor.java:68）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1808）在android.os.Handler.dispatchMessage（Handler.java:106）在android.os.Looper.loop（Looper.java:193）在android.app.ActivityThread.main（ActivityThread.java:6669）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:493）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:858） 2019-03-07 21：14：15.438 1928-2001 /？ E / InputDispatcher：通道'bdcf4f3吐司（服务器）'〜通道无法恢复，将被废弃！

这只发生在Android Studio中，我在最初编写代码的Eclipse中对其进行了测试，但是当我转移到Android Studio时，它不起作用。

Android Studio中的webclient.getPage错误。 HtmlUnit抛出“”

0 个答案: