exception
org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:617) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:476) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:366) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:209) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:267) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1221) org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1005) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:952) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:620) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) com.cosl.common.util.EncodingFilter.doFilter(EncodingFilter.java:51) com.cosl.util.filter.SystemFilter.doFilter(SystemFilter.java:62)
root cause
java.lang.NullPointerException org.apache.taglibs.standard.tlv.JstlBaseTLV.validate(JstlBaseTLV.java:178) org.apache.taglibs.standard.tlv.JstlCoreTLV.validate(JstlCoreTLV.java:134) org.apache.jasper.compiler.TagLibraryInfoImpl.validate(TagLibraryInfoImpl.java:949) org.apache.jasper.compiler.Validator.validateXmlView(Validator.java:1916) org.apache.jasper.compiler.Validator.validate(Validator.java:1884) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:215) org.apache.jasper.compiler.Compiler.compile(Compiler.java:431) org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:608) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:476) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:366) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:209) org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:267) org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1221) org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1005) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:952) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) javax.servlet.http.HttpServlet.service(HttpServlet.java:620) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) javax.servlet.http.HttpServlet.service(HttpServlet.java:727) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) com.cosl.common.util.EncodingFilter.doFilter(EncodingFilter.java:51) com.cosl.util.filter.SystemFilter.doFilter(SystemFilter.java:62)
遇到这个错误,解决不了,该怎么办