Delete data

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2023-12-01

在本节中，我们将展示dataTable中的添加删除功能。

例子 Example Application

让我们创建一个测试JSF应用程序来测试上面的功能。

步	描述
1	在cn.xnip.test包下创建一个名为helloworld的项目，如JSF - Display DataTable JSF - DataTables章节JSF - DataTables章节中所述。
2	修改home.xhtml ，如下所述。保持其余文件不变。
3	编译并运行应用程序以确保业务逻辑按照要求运行。
4	最后，以war文件的形式构建应用程序并将其部署在Apache Tomcat Webserver中。
5	使用适当的URL启动Web应用程序，如下面的最后一步所述。

home.xhtml

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns = "http://www.w3.org/1999/xhtml"   
xmlns:h = "http://java.sun.com/jsf/html"
xmlns:f = "http://java.sun.com/jsf/core">
   <h:head>
      <title>JSF tutorial</title>		
      <h:outputStylesheet library = "css" name = "styles.css"  /> 	
   </h:head>
   <h:body> 
      <h2>DataTable Example</h2>
      <h:form>
         <h:dataTable value = "#{userData.employees}" var = "employee"
            styleClass = "employeeTable"
            headerClass = "employeeTableHeader"
            rowClasses = "employeeTableOddRow,employeeTableEvenRow">
            <h:column>    				
               <f:facet name = "header">Name</f:facet>    				
               <h:inputText value = "#{employee.name}"
                 size = "10" rendered = "#{employee.canEdit}" />
               <h:outputText value = "#{employee.name}"
                  rendered = "#{not employee.canEdit}" />
            </h:column>
            <h:column>
               <f:facet name = "header">Department</f:facet>
               <h:inputText value = "#{employee.department}" 
                  size = "20" rendered = "#{employee.canEdit}" />
               <h:outputText value = "#{employee.department}" 
                  rendered = "#{not employee.canEdit}" />
            </h:column>
            <h:column>
               <f:facet name = "header">Age</f:facet>
               <h:inputText value = "#{employee.age}" size = "5"
                  rendered = "#{employee.canEdit}" />
               <h:outputText value = "#{employee.age}" 
                  rendered = "#{not employee.canEdit}" />
            </h:column>
            <h:column>
               <f:facet name = "header">Salary</f:facet>
               <h:inputText value = "#{employee.salary}" 
                  size = "5" rendered = "#{employee.canEdit}" />
               <h:outputText value = "#{employee.salary}" 
                  rendered = "#{not employee.canEdit}" />
            </h:column>
            <h:column>
               <f:facet name = "header">Delete</f:facet>
               <h:commandButton value = "Delete" 
                  action = "#{userData.deleteEmployee}"  />                
                  <f:setPropertyActionListener 
                     target = "#{userData.employee}" value = "#{employee}" />
               </h:commandButton>
            </h:column>
         </h:dataTable>  
      </h:form>
   </h:body>
</html>

一旦准备好完成所有更改，让我们像在JSF - First Application章节中那样编译和运行应用程序。如果您的应用程序一切正常，这将产生以下结果。

单击任意行的delete按钮。以下是输出。