Fatal编程技术网
  • html/
  • 如何将XHTML页面中的Java小程序中的字符串传递给托管bean

如何将XHTML页面中的Java小程序中的字符串传递给托管bean

html jsf-2

如何将XHTML页面中的Java小程序中的字符串传递给托管bean,html,jsf-2,xhtml,javabeans,glassfish-3,Html,Jsf 2,Xhtml,Javabeans,Glassfish 3,因此，正如我所建议的，我扩展了我前面的问题，以获取打开我的网页的系统的用户名，然后相应地对该用户进行身份验证。多亏了一些有用的建议，经过长时间的阅读和测试，我成功地编写了一个非常简单的Java小程序，并将其嵌入login.xhtml页面。然而，为了将Javaapplet获取的用户名传递给登录管理bean，现在我不得不进行下一个适当的步骤。允许我的网页根据用户的系统用户名对用户进行身份验证，而用户实际上不必在login.xhtml页面中输入用户名。同时，在试图寻找下一个合适的步骤时，我感觉我的理解

因此，正如我所建议的，我扩展了我前面的问题，以获取打开我的网页的系统的用户名，然后相应地对该用户进行身份验证。多亏了一些有用的建议，经过长时间的阅读和测试，我成功地编写了一个非常简单的Java小程序，并将其嵌入login.xhtml页面。然而，为了将Javaapplet获取的用户名传递给登录管理bean，现在我不得不进行下一个适当的步骤。允许我的网页根据用户的系统用户名对用户进行身份验证，而用户实际上不必在login.xhtml页面中输入用户名。同时，在试图寻找下一个合适的步骤时，我感觉我的理解在上下左右移动。我能选择的最好方法是，现在为了将从Javaapplet获取的用户名传递到登录bean，我必须编写JavaScript？但我不确定这是否真的是必需的，或者是否有另一个适当的步骤来更优雅地处理这一问题。请原谅我对这方面的知识有限

根据答案进行的更新

Java小程序代码

  import java.applet.Applet;

    public class SSOApplet extends Applet {

        /**
         * 
         */
        private static final long serialVersionUID = 1L;
        String sysUser = null;

        public String getSystemUsername() {
            try {
                sysUser = System.getProperty("user.name");
                return sysUser;
            } catch (Exception e) {
                System.out.println(e);
                return null;
            }

        }

    public void sendToJs() {
        String name = getSystemUsername();
        System.out.println("sendTOJS picked this username of user" + name);
        try {
            JSObject window = JSObject.getWindow(this);
            window.call("updateServer", new Object[] {name});
        } catch (JSException jse) {
            jse.printStackTrace();
        }
    }
    }
来自我的login.xhtml的代码片段

<script type="text/javascript">
    function updateServer(name) {
        document.getElementById('username').value = name;
        document.getElementById('button').click();
    }
</script>
    <object>
            <param name="myApplet" value="SSOApplet.class" />
        </object>
登录管理Bean

@ManagedBean(name = "loginBean")
@RequestScoped
public class LoginBean implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @EJB
    private UserDaoBean uDB;
    @EJB
    private UserGroupDaoBean uGDB;
    private User userId;

    SSOApplet myapplet = new SSOApplet();

    public String username = myapplet.getSystemUsername();

//  private String username;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String login() {
        FacesContext context = FacesContext.getCurrentInstance();
System.out.println("JS sent this username" + username);
        if (uDB.validateUser(username)) {
            userId = uDB.findUser(username);

            context.getExternalContext().getSessionMap().put("userId", userId);
            if (uGDB.validateGroup(userId)) {
                return "home.jsf?faces-redirect=true&amp;includeViewParams=true";
            }
            return "normalHome.jsf?faces-redirect=true&amp;includeViewParams=true";

        } else {
            FacesMessage message = new FacesMessage();
            message.setSeverity(FacesMessage.SEVERITY_ERROR);
            message.setSummary("Username doesn't exists! OR User is trying to login from someone else's account");
            context.addMessage("", message);
            return null;
        }
    }

WARNING: StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
java.lang.ClassNotFoundException: netscape.javascript.JSException
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1509)
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)
    at beans.LoginBean.<init>(LoginBean.java:31)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at java.lang.Class.newInstance0(Class.java:372)
    at java.lang.Class.newInstance(Class.java:325)
    at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:188)
    at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102)
    at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
    at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
    at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:103)
    at com.sun.el.parser.AstValue.getTarget(AstValue.java:149)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:237)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
    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:593)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    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 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)
控制台中打印的消息

  import java.applet.Applet;

    public class SSOApplet extends Applet {

        /**
         * 
         */
        private static final long serialVersionUID = 1L;
        String sysUser = null;

        public String getSystemUsername() {
            try {
                sysUser = System.getProperty("user.name");
                return sysUser;
            } catch (Exception e) {
                System.out.println(e);
                return null;
            }

        }

    public void sendToJs() {
        String name = getSystemUsername();
        System.out.println("sendTOJS picked this username of user" + name);
        try {
            JSObject window = JSObject.getWindow(this);
            window.call("updateServer", new Object[] {name});
        } catch (JSException jse) {
            jse.printStackTrace();
        }
    }
    }
信息：JS发送了此usernamenull 信息：在数据库中找不到结果 信息：警告：FacesMessage已排队，但可能尚未显示。 sourceId=[严重性=（错误2），摘要=（用户名不存在！或用户试图从其他人的帐户登录），详细信息=（用户名不存在！或用户试图从其他人的帐户登录）]

在Bean中调用小程序后出现异常

@ManagedBean(name = "loginBean")
@RequestScoped
public class LoginBean implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @EJB
    private UserDaoBean uDB;
    @EJB
    private UserGroupDaoBean uGDB;
    private User userId;

    SSOApplet myapplet = new SSOApplet();

    public String username = myapplet.getSystemUsername();

//  private String username;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String login() {
        FacesContext context = FacesContext.getCurrentInstance();
System.out.println("JS sent this username" + username);
        if (uDB.validateUser(username)) {
            userId = uDB.findUser(username);

            context.getExternalContext().getSessionMap().put("userId", userId);
            if (uGDB.validateGroup(userId)) {
                return "home.jsf?faces-redirect=true&amp;includeViewParams=true";
            }
            return "normalHome.jsf?faces-redirect=true&amp;includeViewParams=true";

        } else {
            FacesMessage message = new FacesMessage();
            message.setSeverity(FacesMessage.SEVERITY_ERROR);
            message.setSummary("Username doesn't exists! OR User is trying to login from someone else's account");
            context.addMessage("", message);
            return null;
        }
    }

WARNING: StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception
java.lang.ClassNotFoundException: netscape.javascript.JSException
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1509)
    at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)
    at beans.LoginBean.<init>(LoginBean.java:31)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at java.lang.Class.newInstance0(Class.java:372)
    at java.lang.Class.newInstance(Class.java:325)
    at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:188)
    at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102)
    at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
    at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
    at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
    at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
    at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
    at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
    at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:103)
    at com.sun.el.parser.AstValue.getTarget(AstValue.java:149)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:237)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)
    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:593)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    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 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

警告：StandardWrapperValve[Faces Servlet]：PWC1406:Servlet的Servlet.service（）引发异常
java.lang.ClassNotFoundException:netscape.javascript.JSException
位于org.glassfish.web.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1509）
位于org.glassfish.web.loader.WebappClassLoader.loadClass（WebappClassLoader.java:1359）
在beans.LoginBean.（LoginBean.java:31）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57）
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）
位于java.lang.reflect.Constructor.newInstance（Constructor.java:525）
位于java.lang.Class.newInstance0（Class.java:372）
位于java.lang.Class.newInstance（Class.java:325）
位于com.sun.faces.mgbean.BeanBuilder.newBeanInstance（BeanBuilder.java:188）
在com.sun.faces.mgbean.BeanBuilder.build（BeanBuilder.java:102）上
在com.sun.faces.mgbean.BeanManager.createAndPush（BeanManager.java:409）上
在com.sun.faces.mgbean.BeanManager.create（BeanManager.java:269）上
位于com.sun.faces.el.ManagedBeanELResolver.resolveBean（ManagedBeanELResolver.java:244）
位于com.sun.faces.el.ManagedBeanELResolver.getValue（ManagedBeanELResolver.java:116）
在com.sun.faces.el.DemuxCompositeELResolver.\u getValue（DemuxCompositeELResolver.java:176）
在com.sun.faces.el.DemuxCompositeELResolver.getValue（DemuxCompositeELResolver.java:203）上
位于com.sun.el.parser.astiIdentifier.getValue（astiIdentifier.java:103）
位于com.sun.el.parser.AstValue.getTarget（AstValue.java:149）
位于com.sun.el.parser.AstValue.invoke（AstValue.java:237）
位于com.sun.el.MethodExpressionImpl.invoke（MethodExpressionImpl.java:302）
在com.sun.faces.facelets.el.TagMethodExpression.invoke（TagMethodExpression.java:105）上
位于javax.faces.component.MethodBindingMethodExpressionAdapter.invoke（MethodBindingMethodExpressionAdapter.java:88）
位于com.sun.faces.application.ActionListenerImpl.processAction（ActionListenerImpl.java:102）
在javax.faces.component.UICommand.broadcast（UICommand.java:315）
位于javax.faces.component.UIViewRoot.broadcastEvents（UIViewRoot.java:794）
位于javax.faces.component.UIViewRoot.processApplication（UIViewRoot.java:1259）
位于com.sun.faces.lifecycle.InvokeApplicationPhase.execute（InvokeApplicationPhase.java:81）
位于com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）
在com.sun.faces.lifecycle.LifecycleImpl.execute（LifecycleImpl.java:118）上
位于javax.faces.webapp.FacesServlet.service（FacesServlet.java:593）
位于org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java:1550）
位于org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:281）
位于org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:175）
位于org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:655）
位于org.apache.catalina.core.StandardPipeline.invoke（StandardPipeline.java:595）
位于org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:161）
位于org.apache.catalina.connector.CoyoteAdapter.doService（CoyoteAdapter.java:331）
位于org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:231）
位于com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call（ContainerMapper.java:317）
位于com.sun.enterprise.v3.services.impl.ContainerMapper.service（ContainerMapper.java:195）
位于com.sun.grizzly.http.ProcessorTask.InvokeApter（ProcessorTask.java:860）
在com.sun.grizzly.http.ProcessorTask.doProcess（ProcessorTask.java:757）
位于com.sun.grizzly.http.ProcessorTask.process（ProcessorTask.java:1056）
位于com.sun.grizzly.http.DefaultProtocolFilter.execute（DefaultProtocolFilter.java:229）
位于com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter（DefaultProtocolChain.java:137）
在com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:104）上
在com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:90）上
http.HttpProtocolChain.execute（HttpProtocolChain.java:79）
在com.sun.grizzly.ProtocolChainContextTask.doCa

<h:form prependId="false">
    <h:inputHidden id="username"/>
    <h:commandButton id="button" style="display:none">
        <f:ajax execute="@form/>
    </h:commandButton>
</h:form>