在 JSF1.1 中使用带有 DataTable 的自定义组件时出现重复 ID 错误

Question

当我尝试返回同一页面而不重定向时，出现以下错误。

org.apache.jasper.JasperException: javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.IllegalStateException: Duplicate component ID '_id20' found in view.
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:527)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:401)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346)
    com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
    com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:214)
    org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
root cause

javax.servlet.ServletException: javax.servlet.jsp.JspException: java.lang.IllegalStateException: Duplicate component ID '_id20' found in view.
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
    org.apache.jsp.view_005fneed_jsp._jspService(view_005fneed_jsp.java:556)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346)
    com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
    com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:214)
    org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
root cause

java.lang.IllegalStateException: Duplicate component ID '_id20' found in view.
    com.sun.faces.application.StateManagerImpl.checkIdUniqueness(StateManagerImpl.java:201)
    com.sun.faces.application.StateManagerImpl.checkIdUniqueness(StateManagerImpl.java:204)
    com.sun.faces.application.StateManagerImpl.saveSerializedView(StateManagerImpl.java:97)
    com.sun.faces.taglib.jsf_core.ViewTag.doAfterBody(ViewTag.java:189)
    org.apache.jsp.view_005fneed_jsp._jspx_meth_f_005fview_005f0(view_005fneed_jsp.java:741)
    org.apache.jsp.view_005fneed_jsp._jspService(view_005fneed_jsp.java:546)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346)
    com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152)
    com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
    com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
    com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:214)
    org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)

我有一个自定义组件，它仅在 DataTable 内呈现 HTML 以及 ah:form（也在数据表内）。

我的 bean 是请求级别 Bean，JSF 版本是实现版本：1.1_02-b08

[编辑] 我的自定义组件位于数据表内，我认为这造成了问题， 页面中也没有 Ajax 操作。

我的 jsp 看起来像这样..

<h:datatable>
<h:column>
<ch:activity name="#{need.name}" />

</h:column>

其中 CH:activity 是自定义组件

Answer 1

这些 _idxx id 已生成，并且您的自定义组件中可能存在一些错误。您通常应该为每个组件提供一个自定义 ID，否则 AJAX 函数可能无法正常工作 - 如果您使用它们。

您能发布您的 JSP/XHTML 吗？
你能检查一下你的渲染器（它是一个自定义的，对吗？）不会渲染相同的 id 两次？