求大神解答，谢啦，出现异常，Unable to compile class for JSP

[Alener]

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
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:356)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.lang.NullPointerException
org.apache.tomcat.util.descriptor.tld.TldResourcePath.hashCode(TldResourcePath.java:164)
java.util.HashMap.hash(Unknown Source)
java.util.HashMap.get(Unknown Source)
org.apache.jasper.compiler.TldCache.getTaglibXml(TldCache.java:95)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:174)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:411)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:469)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1430)
org.apache.jasper.compiler.Parser.parse(Parser.java:139)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:227)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:570)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:356)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.20 logs.

[qq_28877415]

兄弟！我也报这个错！你解决了么？

[海兰]

检查下，看看是不是缺少相应的jar包

[winer201112]

我也是菜鸟，也遇到了这个问题，你问的问题不详细，不过应该是关于自定义标签的。我看了一下老外的论坛，貌似说是tomcat8对相对路径路径的不是很好。你可以在web.xml文件中设置好tld的路径，然后JSP中直接<%@ taglib prefix="xia" uri="myTagLib" %>这样写。。<%@ taglib uri="/includes/tt.tld" prefix="tt" %> Turned out that Tomcat 8 Jasper fails on imports with relative path. I changed it to <%@ taglib uri="myTagLib" prefix="tt" %> and defined taglib in my web.xml as <jsp-config> <taglib> <taglib-uri>myTagLib</taglib-uri> <taglib-location>/includes/tt.tld</taglib-location> </taglib> </jsp-config>

[winer201112]

亲测可以，希望能帮到你。。。

[Massahyrler]

这个问题你解决了吗 ？ 我想了好久 上面说得方法也不行