Question

我有一个名为Lecturer的托管bean。讲师托管bean包括部门之间的关系。我想显示存储在数据库中的所有部门。当我注册一个讲师时，我需要得到它的部门。

我的Lecturer管理bean。我有适当的setter和getter方法。我只是省略它以澄清。

public class Lecturer 
{

    private String name;
    private String surname;

    private String email;
    private String username;
    private String password;


    private List<Department> departments;

    private LecturerService lecturerService;
    private DepartmentService departmentService;
}

我的Licturer.xhtml文件：

<h:form>
<f:view>
<p:panelGrid columns="2">  

<f:facet name="header">Lecturer Registration Form</f:facet> 

<h:outputLabel for="name" value="Name :" />  
<p:inputText id="name" value="#{Lecturer.name}" label="Name" required="true" />

<h:outputLabel for="surname" value="Surname :" />  
<p:inputText id="surname" value="#{Lecturer.surname}" label="Surname" required="true" />

<h:outputLabel for="department" value="Department :" /> 


<p:selectOneMenu value="#{Lecturer.departments}" effect="fade" editable="true" var="p" >
<f:selectItem itemLabel="Select One" itemValue="" />
<f:selectItems value="#{Lecturer.departments}" var="lec"
itemLabel="#{lec.name}" itemValue="#{lec.name}"/>
</p:selectOneMenu>


<h:outputLabel for="email" value="Email :" />  
<p:inputText id="email" value="#{Lecturer.email}" label="Email" required="true" />

<h:outputLabel for="username" value="User Name :" />  
<p:inputText id="username" value="#{Lecturer.username}" label="Email" required="true" />

<h:outputLabel for="password" value="Password :" />  
<p:inputText id="password" value="#{Lecturer.password}" label="Password" required="true" />

<f:facet name="footer">

 <p:commandButton type="submit"
                id="lecturer"
                action="#{Lecturer.registerLecturer}"
                value="Register" icon="ui-icon-disk">

                </p:commandButton>

</f:facet>

</p:panelGrid>
</f:view>
</h:form>

my faces-config.xml

<managed-bean>
        <managed-bean-name>Lecturer</managed-bean-name>
        <managed-bean-class>com.studinfo.controller.Lecturer</managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>

        <managed-property>
            <property-name>departmentService</property-name>
            <property-class>com.studinfo.services.DepartmentService</property-class>
            <value>#{DepartmentService}</value>
        </managed-property>

        <managed-property>
            <property-name>lecturerService</property-name>
            <property-class>com.studinfo.services.LecturerService</property-class>
            <value>#{LecturerService}</value>
        </managed-property>
    </managed-bean>

当我删除selectOneMenu标记时。我的页面工作正常。

关于解决方案的任何想法？

我必须在字符串和Department类之间添加转换器吗？

Answer 1

value的{{1}}属性应该包含对单个部门的引用（这是选定的部门），而不是整个列表。您需要在bean中添加一个字段，例如：

p:selectOneMenu

然后在您的facelet中更改private Department selectedDepartment // getter and setter和p:selectOneMenu的值属性：

f:selectItems

此外，您需要一个转换器将选定的字符串映射到对象。

添加selectOneMenu（primefaces）时，JSF页面不起作用

1 个答案: