jsp标签定义_flowershs-优快云博客

本文分析了Java程序中出现的IllegalStateException异常原因，并详细解释了由于Web应用程序实例已停止而导致的问题。此外还探讨了TLD重复定义所引起的警告。

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java程序编译出错log如下：

信息: Illegal access: this web application instance has been stopped already.  Could not load java.net.BindException.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1600)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
	at com.mysql.jdbc.SQLError.createLinkFailureMessageBasedOnHeuristics(SQLError.java:1279)
	at com.mysql.jdbc.exceptions.jdbc4.CommunicationsException.<init>(CommunicationsException.java:60)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1122)
	at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3317)
	at com.mysql.jdbc.MysqlIO.quit(MysqlIO.java:1668)
	at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4461)
	at com.mysql.jdbc.ConnectionImpl.cleanup(ConnectionImpl.java:1359)
	at com.mysql.jdbc.ConnectionImpl.finalize(ConnectionImpl.java:2809)
	at java.lang.ref.Finalizer.invokeFinalizeMethod(Native Method)
	at java.lang.ref.Finalizer.runFinalizer(Finalizer.java:101)
	at java.lang.ref.Finalizer.access$100(Finalizer.java:32)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:190)
十二月 05, 2016 11:02:10 下午 org.apache.catalina.startup.TaglibUriRule body
信息: TLD skipped. URI: http://www.springframework.org/tags/form is already defined
十二月 05, 2016 11:02:10 下午 org.apache.catalina.startup.TaglibUriRule body
信息: TLD skipped. URI: http://www.springframework.org/tags is already defined

分析后得出jsp代码块里少了标签定义：红色字体

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://"
			+ request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">