Java 重定向到多个选项卡

目标

当用户单击链接时，生成3个pdf文件，并使用jsf在3个选项卡中打开它们

迄今为止的进展

我能够生成3个pdf文件，但只能重定向到一个选项卡

豆子

.xhtml

---

有什么解决办法吗？

将PDF内容存储在备份文件中。如果使用选项卡，则只需一个PDF即可渲染。生成页面时，不要使用三个浏览器选项卡，而是使用UITabView组件并访问bean存储的PDF文件名

托管bean：

@Named
@SessionScoped
public class TabbedPDFViewBean
{
  private String[] fileNames = new String[3];

  public String getFileName0() { fileNames[0]; }
  public void setFileName0( String fileName_ ) { fileName[0] = fileName_; }
  public String getFileName1() { fileNames[1]; }
  public void setFileName1( String fileName_ ) { fileName[1] = fileName_; }
  public String getFileName2() { fileNames[2]; }
  public void setFileName2( String fileName_ ) { fileName[2] = fileName_; }

}

facelet：

<p:tabView>
  <p:tab title="PDF1">
    <iframe src="#{tabbedPDFViewBean.fileName0}" width="600" height="400" scrolling="no"></iframe>
  </p:tab>
</p:tabView>

将用户重定向到一个有

链接的页面，并嵌入一点JavaScript，在页面加载后打开PDF链接。你不能重定向到多个页面……如果需要，你可以下载它们……这与itext或java se有什么关系？@Kukeltje不是java se。无论如何，为什么它们不能相互关联呢？只有在pojo类中使用一个main方法而不使用任何其他框架来重现它们时，才与JavaSE相关。

Apr 03, 2017 7:49:52 PM com.sun.faces.lifecycle.InvokeApplicationPhase execute
WARNING: #{cartController.printReceipt()}: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
javax.faces.FacesException: #{cartController.printReceipt()}: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
    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:198)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:654)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at com.boutique.common.filter.AuthFilter.doFilter(AuthFilter.java:73)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.faces.el.EvaluationException: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    ... 31 more
Caused by: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
    at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:494)
    at com.sun.faces.context.ExternalContextImpl.redirect(ExternalContextImpl.java:678)
    at javax.faces.context.ExternalContextWrapper.redirect(ExternalContextWrapper.java:578)
    at com.boutique.common.controller.AbstractController.redirectToPage(AbstractController.java:408)
    at com.boutique.controller.CartController.printReceipt(CartController.java:181)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
    at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
    ... 32 more

Apr 03, 2017 7:49:52 PM com.sun.faces.context.ExceptionHandlerImpl throwIt
INFO: Exception when handling error trying to reset the response.
javax.faces.el.EvaluationException: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
    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:790)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
    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:198)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:654)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at com.boutique.common.filter.AuthFilter.doFilter(AuthFilter.java:73)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:509)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed
    at org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:494)
    at com.sun.faces.context.ExternalContextImpl.redirect(ExternalContextImpl.java:678)
    at javax.faces.context.ExternalContextWrapper.redirect(ExternalContextWrapper.java:578)
    at com.boutique.common.controller.AbstractController.redirectToPage(AbstractController.java:408)
    at com.boutique.controller.CartController.printReceipt(CartController.java:181)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
    at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
    ... 32 more

javax.servlet.ServletException: java.lang.IllegalStateException: Cannot call sendRedirect() after the response has been committed

@Named
@SessionScoped
public class TabbedPDFViewBean
{
  private String[] fileNames = new String[3];

  public String getFileName0() { fileNames[0]; }
  public void setFileName0( String fileName_ ) { fileName[0] = fileName_; }
  public String getFileName1() { fileNames[1]; }
  public void setFileName1( String fileName_ ) { fileName[1] = fileName_; }
  public String getFileName2() { fileNames[2]; }
  public void setFileName2( String fileName_ ) { fileName[2] = fileName_; }

}

<p:tabView>
  <p:tab title="PDF1">
    <iframe src="#{tabbedPDFViewBean.fileName0}" width="600" height="400" scrolling="no"></iframe>
  </p:tab>
</p:tabView>