我的自定義jsp標記庫拋出錯誤HTTP狀態500-無法為JSP編譯類

Question

我的自定義jsp標記庫引發錯誤HTTP Status 500-無法為JSP編譯類，並且如果刷新同一頁面，它將出現新錯誤HTTP Status 500-java.lang.ClassNotFoundException：org.apache.jsp。 jspstn_jsp。 通過從jsp中刪除taglib指令和自定義tld的標記，我感到很累，無法正常工作。 我不知道我的代碼有什么問題。

jsp文件：

<%@page  contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib  uri="/WEB-INF/tlds/ct.tld" prefix="cp"  %>
<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>JSP Page</title>
</head>
<body>
    <h1>Hello World! jspstn</h1>
    <cp:tp></cp:tp>
</body>

自定義tld文件：

 <?xml version="1.0" encoding="UTF-8"?>
 <taglib version="2.1" xmlns="http://java.sun.com/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd">
 <tlib-version>1.0</tlib-version>
  <short-name>ct</short-name>
  <uri>/WEB-INF/tlds/ct</uri>
   <tag>
  <name>tp</name>
  <body-content>empty</body-content>
   <tag-class>ctc</tag-class>
     </tag>
     </taglib>

自定義tld類（標記處理程序類）：

import java.io.IOException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;

public class ctc extends SimpleTagSupport {


@Override
public void doTag() throws JspException, IOException {
    JspWriter hp = getJspContext().getOut();
    hp.print("works");
}

 }

web.xml文件：

 <?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">

<jsp-config>
    <taglib>
        <taglib-location>/WEB-INF/tlds/ct.tld</taglib-location>
        <taglib-uri>/WEB-INF/tlds/ct.tld</taglib-uri>
    </taglib>
</jsp-config>

<session-config>
    <session-timeout>
        30
    </session-timeout>
</session-config>

錯誤：

   HTTP Status 500 - Unable to compile class for JSP:

   type Exception report

  message Unable to compile class for JSP:

  description The server encountered an internal error that prevented it from    fulfilling this request.

  exception

   org.apache.jasper.JasperException: Unable to compile class for JSP: 

    An error occurred at line: 17 in the jsp file: /jspstn.jsp
     ctc cannot be resolved to a type
        14:     </head>
           15:     <body>


            16:         <h1>Hello World! jspstn</h1>
             17:         <cp:tp></cp:tp>
              18:     </body>
               19: </html>

錯誤2：

     HTTP Status 500 - java.lang.ClassNotFoundException:  org.apache.jsp.jspstn_jsp

       type Exception report

       message java.lang.ClassNotFoundException: org.apache.jsp.jspstn_jsp

     description The server encountered an internal error that prevented it from fulfilling this request.

     exception

     org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.jspstn_jsp
  org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:176)
  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:380)
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

  root cause

  java.lang.ClassNotFoundException: org.apache.jsp.jspstn_jsp
java.net.URLClassLoader.findClass(URLClassLoader.java:381)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:129)
org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:60)
   org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:171)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:380)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Netbeans 8.2，Tomcat 8.5.8。 如果在回答我的問題時需要其他信息，請刪除評論。 抱歉打錯了

Answer 1

在您的標記庫描述符（tld）文件中，指定該類的標准程序包名稱 。

代替

 <tag-class>ctc</tag-class>

做

<tag-class>your.package.ctc</tag-class>

我的自定義jsp標記庫拋出錯誤HTTP狀態500-無法為JSP編譯類

問題描述

1 個解決方案

解決方案1
0 2017-01-18 16:26:47

我的自定義jsp標記庫拋出錯誤HTTP狀態500-無法為JSP編譯類

問題描述

1 個解決方案

解決方案1 0 2017-01-18 16:26:47

解決方案1
0 2017-01-18 16:26:47