自定义 JSP 标记错误：没有找到“taglib”的子翻译器答案

【问题标题】：Custom JSP tag error: did not find a Child Translator for "taglib"自定义 JSP 标记错误：没有找到“taglib”的子翻译器
【发布时间】：2011-07-11 15:36:54
【问题描述】：

所以我正在尝试创建要显示的自定义标签的sample 当前的日期。我做了示例中所述的一切，但是在启动我的服务器时抛出错误：没有找到“taglib”的子翻译器。这里需要修复什么？

Caused by: org.eclipse.jst.j2ee.commonarchivecore.internal.exception.ArchiveWrappedException
    at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ModuleRefImpl.getDeploymentDescriptor(ModuleRefImpl.java:167)
    at com.ibm.ws.runtime.component.DeployedModuleImpl.open(DeployedModuleImpl.java:237)
    at com.ibm.ws.runtime.component.DeployedModuleImpl.initialize(DeployedModuleImpl.java:436)
    ... 53 more
Caused by: org.eclipse.jst.j2ee.commonarchivecore.internal.exception.DeploymentDescriptorLoadException: WEB-INF/web.xml
    at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.WARFileImpl.getDeploymentDescriptor(WARFileImpl.java:147)
    at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.WARFileImpl.getStandardDeploymentDescriptor(WARFileImpl.java:301)
    at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.EARFileImpl.getDeploymentDescriptor(EARFileImpl.java:401)
    at org.eclipse.jst.j2ee.commonarchivecore.internal.impl.ModuleRefImpl.getDeploymentDescriptor(ModuleRefImpl.java:165)
    ... 55 more
Caused by: java.lang.IllegalStateException: Parent Translator (WebAppTranslator(web-app,1971221886)) did not find a Child Translator for "taglib".

web.xml 声明为：

<taglib>
 <taglib-uri>myTags</taglib-uri>
 <taglib-location>/WEB-INF/lib/DateTagLib.tld</taglib-location>
</taglib>

TLD 文件：

<?xml version="1.0" encoding="ISO-8859-1" ?>

<taglib>
   <tlibversion>1.0</tlibversion>
   <info>Custom Date Tag</info>

  <tag>
    <name>displayDate</name>
    <tagclass>com.demo.DateTag</tagclass>
    <bodycontent>empty</bodycontent>
    <info>Display Date</info>
  </tag>

标签类：

package com.demo;

import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;
import javax.servlet.http.*;

import java.io.IOException;
import java.text.*;
import java.util.*;

public class DateTag extends TagSupport {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public int doStartTag() throws javax.servlet.jsp.JspException {
        HttpServletRequest req;
        Locale locale;
        HttpJspPage g;
        DateFormat df;
        String date;
        JspWriter out;

        req = (HttpServletRequest) pageContext.getRequest();
        locale = req.getLocale();
        df = SimpleDateFormat.getDateInstance(SimpleDateFormat.FULL, locale);
        date = df.format(new java.util.Date());  

        try {
            out = pageContext.getOut();
            out.print(date);
            } catch(IOException ioe){
                throw new JspException("IO Error: " + ioe.getMessage());
            } //end try/catch

            return Tag.SKIP_BODY;

    } //end doStarttag

} //end DateTag

</taglib>

【问题讨论】：

更新：我在内的 WEB.xml 中包装了 taglib 标记，异常消失了。但现在我得到：无法找到 uri 的标签库

标签： java jsp jsp-tags

【解决方案1】：

嗯，我想通了。我没有在部署描述符中对您的自定义标记进行“静态引用”，而是尝试从 JSP 页面本身动态引用它并且它起作用了。

【讨论】：