报错<Jul 14, 2025, 5
:57
:52,087 PM China Standard Time> <
Warning> <com.lkm.ejb.dept.ejb.DeptInfoEjb_562xts_Impl> <BEA-000000> <error at saveEventData
:IllegalArgumentException
: An instance of a null PK has
been incorrectly provided for this find operation.> ， <p
:outputPanel>
<h
:panelGrid columns="2" styleClass="no-border">
<p
:outputPanel style = "display
: flex;flex-wrap
: wrap;">
<h
:panelGrid columns="1" styleClass="no-border">
<h
:panelGrid columns="12" responsive="true" styleClass="no-border">
<div class="ui-inputgroup" style="display
:inline-block;">
<p
:outputLabel value="部门名称" />
<p
:inputText id="dept_name" style="width
:180px" value="#{departmentBean.department.name}"/>
</div>
<div class="ui-inputgroup" style="display
:inline-block;">
<p
:outputLabel value="部门地址" />
<p
:inputText id="dept_addr" style="width
:180px" value="#{departmentBean.department.addr}"/>
</div>
<p
:command
Button value="提交" rendered="#{departmentBean.preview}"
action="#{departmentBean.createDept}"
update="@form
:dataTableId"
oncomplete="if
(!args.validationFailed
) PF
('createDept'
).hide
()"
class="query" ajax="true" style="width
:80px;" />
</h
:panelGrid>
</h
:panelGrid>
</p
:outputPanel>
</h
:panelGrid>
</p
:outputPanel>， public void createDept
() {
try {
// 从Bean获取表单提交的数据
String name = department.getName
(); // 从表单绑定的对象获取
String addr = department.getAddr
();
// 保存部门
DeptmentDm deptmentDm = new DeptmentDm
();
deptmentDm.setAddr
(addr
);
deptmentDm.setName
(name
);
deptmentDm.setUpdateTime
(new Date
());
deptmentSerivce.saveEventData
(deptmentDm
);
// department = new DeptmentQuery
(); // 重置表单
// departments = null; // 强制刷新列表
FacesMessage message = new
FacesMessage(FacesMessage.SEVERITY_INFO, "成功", "部门创建成功"
);
FacesContext.getCurrentInstance
().addMessage
(null, message
);
} catch
(Exception e
) {
// 显示错误消息
FacesMessage message = new
FacesMessage(FacesMessage.SEVERITY_ERROR, "错误", "创建部门失败
: " + e.getMessage
());
FacesContext.getCurrentInstance
().addMessage
(null, message
);
}
}
本文探讨了JSF页面Action中出现错误提示的原因，并提出了两种常见解决方案：一是确保页面包含<h:messages>标签以接收FacesMessage；二是确认按钮的Action中有reRender属性指向消息容器。
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