1 HTTP Status 500 - java.lang.NullPointerException 2  3 type Exception report 4  5 message java.lang.NullPointerException 6  7 description The server encountered an internal error that prevented it from fulfilling this request. 8  9 exception10 11 org.apache.jasper.JasperException: java.lang.NullPointerException12     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:585)13     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:396)14     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)15     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)16     javax.servlet.http.HttpServlet.service(HttpServlet.java:728)17     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)18     org.nutz.mvc.NutFilter.nextChain(NutFilter.java:226)19     org.nutz.mvc.NutFilter.doFilter(NutFilter.java:201)20 root cause21 22 java.lang.NullPointerException23     org.apache.jsp.index_jsp._jspInit(index_jsp.java:31)24     org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:49)25     org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:180)26     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)27     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)28     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)29     javax.servlet.http.HttpServlet.service(HttpServlet.java:728)30     org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)31     org.nutz.mvc.NutFilter.nextChain(NutFilter.java:226)32     org.nutz.mvc.NutFilter.doFilter(NutFilter.java:201)33 note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.

原因是jar冲突

删掉就OK了。

<dependency>

　　<groupId>javax.servlet.jsp</groupId>

　　<artifactId>jsp-api</artifactId>

　　<version>2.2.1-b03</version>

</dependency>