我想通过java progrram登录ORKUT而不涉及IE或Firefox,
我以下列方式使用HTMLUnit:
import com.gargoylesoftware.htmlunit.WebClient;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.HtmlPasswordInput;
import com.gargoylesoftware.htmlunit.html.HtmlTextInput;
import com.gargoylesoftware.htmlunit.html.HtmlSubmitInput;
public class HtmlUnit {
public void submittingForm() throws Exception {
final WebClient webClient = new WebClient();
// Get the first page
final HtmlPage page1 = webClient.getPage("https://www.google.com/accounts/ServiceLogin?service=orkut&hl=en-US&rm=false&continue=http%3A%2F%2Fwww.orkut.com%2FRedirLogin%3Fmsg%3D0%26page%3Dhttp%253A%252F%252Fwww.orkut.co.in%252FHome.aspx&cd=IN&passive=true&skipvpage=true&sendvemail=false");
System.out.println("Page1: " + page1.toString());
// Get the form that we are dealing with and within that form,
// find the submit button and the field that we want to change.
final HtmlSubmitInput button = page1.getElementByName("signIn");
final HtmlTextInput userName = page1.getElementByName("Email");
final HtmlPasswordInput password = page1.getElementByName("Passwd");
// Change the value of the text field
userName.setValueAttribute("username");
password.setValueAttribute("password");
// Now submit the form by clicking the button and get back the second page.
final HtmlPage page2 = button.click();
System.out.println("Page2: " + page2.toString());
}
public static void main(String[] args) {
try {
new HtmlUnit().submittingForm();
}catch(Exception ex) {
ex.printStackTrace();
}
}
}
但在运行上述程序后,我收到以下错误:
Page1: HtmlPage(https://www.google.com/accounts/ServiceLogin?service=orkut&hl=en-US&rm=false&continue=http%3A%2F%2Fwww.orkut.com%2FRedirLogin%3Fmsg%3D0%26page%3Dhttp%253A%252F%252Fwww.orkut.co.in%252FHome.aspx&cd=IN&passive=true&skipvpage=true&sendvemail=false)@6011238
Sep 15, 2009 4:54:37 PM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify
WARNING: Expected content type of 'application/javascript' or 'application/ecmascript' for remotely loaded JavaScript element at 'http://static1.orkut.com/js/gen/in_frame046.js', but got 'application/x-javascript'.
Sep 15, 2009 4:54:38 PM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify
WARNING: Expected content type of 'application/javascript' or 'application/ecmascript' for remotely loaded JavaScript element at 'http://static1.orkut.com/js/gen/gtalk_client031.js', but got 'application/x-javascript'.
Sep 15, 2009 4:54:38 PM com.gargoylesoftware.htmlunit.IncorrectnessListenerImpl notify
WARNING: Expected content type of 'application/javascript' or 'application/ecmascript' for remotely loaded JavaScript element at 'http://static1.orkut.com/ifpc/ifpc.js', but got 'application/x-javascript'.
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at net.sourceforge.htmlunit.corejs.javascript.ObjToIntMap.rehashTable(ObjToIntMap.java:330)
at net.sourceforge.htmlunit.corejs.javascript.ObjToIntMap.ensureIndex(ObjToIntMap.java:415)
at net.sourceforge.htmlunit.corejs.javascript.ObjToIntMap.intern(ObjToIntMap.java:197)
at net.sourceforge.htmlunit.corejs.javascript.TokenStream.getToken (TokenStream.java:435)
at net.sourceforge.htmlunit.corejs.javascript.Parser.peekToken(Parser.java:313)
at net.sourceforge.htmlunit.corejs.javascript.Parser.variables(Parser.java:1791)
at net.sourceforge.htmlunit.corejs.javascript.Parser.statementHelper (Parser.java:959)
at net.sourceforge.htmlunit.corejs.javascript.Parser.statement(Parser.java:877)
at net.sourceforge.htmlunit.corejs.javascript.Parser.parse(Parser.java:549)
at net.sourceforge.htmlunit.corejs.javascript.Parser.parse(Parser.java:492)
at net.sourceforge.htmlunit.corejs.javascript.Context.compileImpl(Context.java:2404)
at net.sourceforge.htmlunit.corejs.javascript.Context.compileString(Context.java:1375)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory$TimeoutContext.compileString(HtmlUnitContextFactory.java:173)
at net.sourceforge.htmlunit.corejs.javascript.Context.compileString(Context.java:1364)
at com.gargoylesoftware.htmlunit.javascript.host.Window.custom_eval(Window.java:1143)
at com.gargoylesoftware.htmlunit.javascript.host.Window.jsxFunction_execScript(Window.java:1122)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at net.sourceforge.htmlunit.corejs.javascript.MemberBox.invoke(MemberBox.java:161)
at net.sourceforge.htmlunit.corejs.javascript.FunctionObject.call(FunctionObject.java:476)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1688)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:845)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:164)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:427)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:263)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3058)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:175)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$5.doRun(JavaScriptEngine.java:415)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:520)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:529)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:536)
所以,我不明白问题出在哪里。执行以下行时发生错误:
final HtmlPage page2 = button.click();
答案 0 :(得分:4)
错误名称提供了一个提示:Java虚拟机需要更多内存。您可以通过向jvm添加标志'-Xmx128M'来增加堆空间(或者增加整数值以防万一,java调用已经有一个值较小的Xmx参数。
使用上面的示例,您将拥有128 MB的堆空间。
答案 1 :(得分:2)
尝试增加启动应用程序的堆空间量; e.g。
java -Xmx256M ...
答案 2 :(得分:2)
我认为您需要了解点击提交/登录时会发生什么,因为我怀疑jvm在执行此操作时应该耗尽内存。也许它会进入某种无限循环并继续下载数据?也许Google的登录会识别非浏览器何时尝试登录?
答案 3 :(得分:0)
您可能还需要在某个时刻增加permSize ...因此请使用以下内容来避免两者:
java -Xmx512m -XX:MaxPermSize = 256m ...
答案 4 :(得分:0)
你得到 java.lang.OutOfMemoryError:Java堆空间
1)在java中解决OutOfMemoryError的简单方法是通过使用JVM选项“-Xmx512M”来增加最大堆大小,这将立即解决您的OutOfMemoryError。
当我在构建项目时在Eclipse,Maven或ANT中获得OutOfMemoryError时,这是我的首选解决方案,因为根据项目的大小,您可以轻松地耗尽内存。这是一个增加JVM最大堆大小的示例。
如果在java应用程序中设置堆大小,最好将-Xmx保持为-Xms比例为1:1或1:1.5
导出JVM_ARGS =“ - Xms1024m -Xmx1024m”
2)在Java中解决OutOfMemoryError的第二种方法相当困难,当你没有太多内存时甚至在增加最大堆大小之后你仍然得到java.lang.OutOfMemoryError,在这种情况下你可能想要分析您的应用程序并寻找任何内存泄漏。
如果您使用的是Eclipse IDE,则可以使用 Eclipse Memory Analyzer 检查堆转储,也可以使用Netbeans或JProbe等任何分析器。这是一个棘手的解决方案,需要一些时间来分析和发现内存泄漏。
3)有很多工具可以调查和修复Java中的OutOfMemoryError
<强> ----&GT; visualgc的强>
Visualgc代表Visual Garbage Collection Monitoring Tool,您可以将它附加到已检测的hostspot JVM。 visualgc的主要优势在于它以图形方式显示所有关键数据,包括类加载器,垃圾收集和JVM编译器性能数据。 目标JVM由其虚拟机标识符标识,也称为vmid。
<强> ----&GT; JMAP 强>
Jmap是JDK6附带的命令行实用程序,允许您在文件中进行堆内存转储。它很容易用作下面的shwon:
jmap -dump:format = b,file = heapdump 6054
此文件指定内存转储文件的名称,即“heapdump”,6054是Java进度的PID。您可以使用“ps -ef”或Windows任务管理器或使用名为“jps”的工具(Java虚拟机进程状态工具)找到PDI。
<强> ----&GT;与jHat 强>
Jhat早先被称为hat(堆分析器工具),但它现在是JDK6的一部分。您可以使用jhat分析使用“jmap”创建的堆转储文件。 Jhat也是一个命令行实用程序,你可以从cmd窗口浏览它,如下所示:
jhat -J-Xmx256m heapdump
这里将分析文件“heapdump”中包含的内存转储。当你启动jhat它会读取这个堆转储文件,然后开始在http端口上监听,只需将你的浏览器指向jhat正在监听的端口,默认为7000,然后你可以开始分析堆转储中存在的对象。
希望这会有所帮助。