我尝试在Web应用程序中创建登录表单.在我可以使用的JSP页面中
<%
String name = request.getParameter( "username" );
session.setAttribute( "theName", name );
%>
但现在我使用JSF/Facelets进行Web应用程序我不知道如何在JSF Backing bean中为客户端创建会话,并检查用户是否已登录,因此它将重定向到登录页面.谁能帮我提一下这些问题的链接教程？谢谢你
现在我没有遇到映射到类Filter的web.xml代码的问题
@Override
public void init(FilterConfig filterConfig) throws ServletException {
this.config = filterConfig;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse res = (HttpServletResponse) response;
LoginController controller = (LoginController) req.getSession()
.getAttribute("loginController");
if (controller == null || !controller.isLoggedIn()) {
res.sendRedirect("../admin/login.xhtml");
} else {
chain.doFilter(request, response);
}
}
并在web.xml我用<fitler>标签映射
<filter>
<filter-name>userLoginFilter</filter-name> …你好,我有新的问题添加表格我的问题在这里
WARNING: /test.xhtml @24,173 value="#{userController.users.username}": Target Unreachable, 'null' returned null
javax.el.PropertyNotFoundException: /test.xhtml @24,173 value="#{userController.users.username}": Target Unreachable, 'null' returned null
at com.sun.faces.facelets.el.TagValueExpression.getType(TagValueExpression.java:93)
at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:95)
at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1008)
at javax.faces.component.UIInput.validate(UIInput.java:934)
at javax.faces.component.UIInput.executeValidate(UIInput.java:1189)
at javax.faces.component.UIInput.processValidators(UIInput.java:691)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1080)
at javax.faces.component.UIForm.processValidators(UIForm.java:243)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1080)
at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1080)
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1180)
at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
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:312)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at …大家好我是EJB3的新手,我知道如何在一台计算机上的Glassfish服务器上部署Session Bean(无状态或有状态).我的问题是:我如何在计算机A上部署会话bean并在计算机B上部署Servlet或JSP？它意味着计算机A具有会话Bean源,而计算机B具有Servlet或JSP源.如果使用1台计算机,我可以使用@EJB依赖注入查找会话Bean但在另一台计算机上如何才能为客户端代码执行此操作？1台计算机的示例
@EJB
private StatelessRemote remote ;
double Dosomething= remote.Dosomething();
out.println(Dosomething);
我正在用 JSP 为主题库做一个小项目。当最终用户查看这本书的详细信息和评分时，我想为图书馆中的书籍创建一个评分系统。任何人都可以提供提示或教程如何解决这个问题？
各位大家好,我想知道:我什么时候可以使用映射来指示哪个是由于一对一或一对多的关系 - 或多对多关系映射与EJB3(JPA)示例我有两个表A和B表A属于表B所以我所映射的是哪个表？
如何用HTML标签显示值h:inputTextarea？在DB我有列包含数据,它包含纯文本和HTML标记,我想显示它h:inputTextarea.我该怎么做？
大家现在我正在使用JSF 2.0和EJB3,我使用Primefaces显示错误消息或成功消息,我有两个问题是当我把Button sumit(JSF命令按钮)下一页错误显示
/register.xhtml @ 26,172 value ="#{userController.user.username}":目标无法访问,'null'返回null
我的代码是
用户实体
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.demoejb.entity;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
*
* @author KencyWindy
*/
@Entity
@Table(name = "iuser")
@NamedQueries({
@NamedQuery(name = …我希望从客户端和服务器端加密密码,这意味着两次加密,我在谷歌剪切代码Javascript md5上找到但我怎么能用JSF？在服务器端我可以做但是,但在客户端与JSF我怎么办？
我得到转换器的新错误
javax.faces.component.UpdateModelException: java.lang.IllegalArgumentException: Cannot convert 5 of type class java.lang.Integer to class com.jpa.entity.Groups
at javax.faces.component.UIInput.updateModel(UIInput.java:839)
at javax.faces.component.UIInput.processUpdates(UIInput.java:722)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIForm.processUpdates(UIForm.java:270)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIComponentBase.processUpdates(UIComponentBase.java:1108)
at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1239)
at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
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:312)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at …