编程JavaEE6登录:如何捕获LoginException？

Question

我已经使用支持bean和request.login()函数实现了登录。它工作得很好，但是如果登录失败，它会抛出一个严重的错误。这很好，因为我之前发现了一个不同的错误(ServletException)，并且我能够移动到正确的页面。它仍然在后台抛出LoginException。所以它用这个错误填满了日志。

下面是我的方法：

  public String login() {

    FacesContext context = FacesContext.getCurrentInstance();
    HttpServletRequest request = (HttpServletRequest) context.getExternalContext().getRequest();

    try {
        request.login(this.userName, this.password);
        return "index?faces-redirect=true";
    } catch (Exception e) {
        return "error?faces-redirect=true";
    }

这是用户登录失败时错误的堆栈跟踪。

    WARNING: Exception
com.sun.enterprise.security.auth.login.common.LoginException: Login failed: Security Exception
    at com.sun.enterprise.security.auth.login.LoginContextDriver.doPasswordLogin(LoginContextDriver.java:394)
    at com.sun.enterprise.security.auth.login.LoginContextDriver.login(LoginContextDriver.java:240)
    at com.sun.enterprise.security.auth.login.LoginContextDriver.login(LoginContextDriver.java:153)
    at com.sun.web.security.RealmAdapter.authenticate(RealmAdapter.java:483)
    at com.sun.web.security.RealmAdapter.authenticate(RealmAdapter.java:425)
    at org.apache.catalina.connector.Request.login(Request.java:1916)
    at org.apache.catalina.connector.Request.login(Request.java:1879)
    at org.apache.catalina.connector.RequestFacade.login(RequestFacade.java:1146)
    at com.atlanticpkg.must.view.LoginBean.login(LoginBean.java:32)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:234)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
    at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:43)
    at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:56)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:662)
Caused by: javax.security.auth.login.LoginException: Security Exception
    at javax.security.auth.login.LoginContext.invoke(LoginContext.java:856)
    at javax.security.auth.login.LoginContext.access$000(LoginContext.java:186)
    at javax.security.auth.login.LoginContext$4.run(LoginContext.java:683)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.login.LoginContext.invokePriv(LoginContext.java:680)
    at javax.security.auth.login.LoginContext.login(LoginContext.java:579)
    at com.sun.enterprise.security.auth.login.LoginContextDriver.doPasswordLogin(LoginContextDriver.java:382)
    ... 51 more
Caused by: java.lang.SecurityException
    at javax.security.auth.login.LoginContext.invoke(LoginContext.java:857)

我似乎无法捕捉到这个错误。如果我试图捕获它，Netbeans会给我一个永远不会抛出的错误。

Answer 1

你不能捕获它，因为它没有被抛出。它只是被容器的内部代码捕获并记录下来。

打开文件/domains/domain1/config/logging.properties并添加以下行

com.sun.enterprise.security.level=SEVERE

让它只记录SEVERE日志，这是比WARNING更高的级别。