Jsf 2 在清除/重置表单时禁用bean验证

案例：表单包含用于输入部门名称的输入文本（不能为null或空白），以及用于选择上级部门的下拉列表（可以为null），输入数据并按clear时，backing bean中的clear方法可以正常工作，但当不输入数据并按clear时，名称上的非空bean验证有效并显示验证消息，我想在清除时禁用验证

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

查看代码：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

部门名称：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

上级部门：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

Bean验证：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

@NotBlank（message=“{name.required}”）
@大小（最大值=25，消息=“{long.value}”）
@列（name=“name”，长度=25，可空=false）
私有字符串名称

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

支持Bean方法：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

public void clear（）{
setDepartmentObj（新部门（））；
设置选定的父部门（0）；
}

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

---

某些组件有一个

valueChangeListener

。试着用那个。但是，我不确定这是否也会触发验证。

您可以让它刷新整个视图：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

<h:commandLink value="Clear" action="#{bean.clear}" immediate="true" />

immediate=“true”

将跳过所有没有

immediate=“true”

的输入组件的处理（和验证）

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

或者，重新加载页面的一段JavaScript也应执行以下操作：

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>

<h:commandLink value="Clear" onclick="window.location.reload(); return false;" />

---

因为

execute

设置为

@this

（顺便说一句，这已经是默认值了，所以您可以忽略它），它不会处理整个表单。

如果我不想重新加载整个页面，因为我忘了提到页面包含一些树组件，那么通过重新加载整个页面，它们也会被重新加载，这在清除表单时没有意义，我只想重新加载表单，你明白我的意思吗？还有一种情况，在验证空名称后尝试清除时，它不会清除表单，尽管它进入了clear方法。

<h:outputLabel>Parent Department:</h:outputLabel>
    <ice:selectOneMenu id="parentDepartment" value="#{department.selectedParentDepartment}">               
      <f:selectItem/>
      <f:selectItems value="#{departmentBean.departmentList}" var="dept" 
       itemLabel="#{dept.name}" itemValue="#{dept.id}" />                            
    </ice:selectOneMenu> 
    <h:message for="parentDepartment" style="color:red" />        

<ice:panelGroup>
    <h:commandLink value="Add New" action="#{departmentBean.addOrUpdateDepartment}" />
    <h:commandLink value="Add New" actionListener="#{departmentBean.clear}" />
</ice:panelGroup>