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求助 JSP 随便怎么样访问都报错500

我已经听到后面课程才发现,现在卡在这里进行不下去了来求助老师,访问一直都是报500错误,Users_login.jsp一直存在问题,我发现哪怕我另开一个工程就单独放一个JSP 也是一样的500报错。。。求助大神~~~

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
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(HashMap.java:366)
java.util.HashMap.getEntry(HashMap.java:466)
java.util.HashMap.get(HashMap.java:421)
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/8.0.17 logs.

Apache Tomcat/8.0.17


正在回答

1 回答

空指针异常,看看有什么参数是需要判空的,if null 一下

0 回复 有任何疑惑可以回复我~
#1

红发少年 提问者

是素材的代码多了一点东西,我删掉就能过了,这是最后一课的东西,到时候再研究怎么加
2015-09-13 回复 有任何疑惑可以回复我~

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求助 JSP 随便怎么样访问都报错500

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