Question

求解： java web项目 http：500错误

HTTP Status 500 -
typeException report
message
descriptionThe server encountered an internal error () that
prevented it from fulfilling this request.
exceptionorg.apache.jasper.JasperException: java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:161)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.cheea.filter.AuthFilter.doFilter(AuthFilter.java:38)
com.anychart.servlet.ResourceFilter.doFilter(ResourceFilter.java:53)
com.cheea.filter.EncodingFilter.doFilter(EncodingFilter.java:29)
root causejava.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:151)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.cheea.filter.AuthFilter.doFilter(AuthFilter.java:38)
com.anychart.servlet.ResourceFilter.doFilter(ResourceFilter.java:53)
com.cheea.filter.EncodingFilter.doFilter(EncodingFilter.java:29)
noteThe full stack trace of the root cause is available in the
Apache Tomcat/6.0.35 logs.

Answer 1

重启tomcat，500以上都是后台java代码错误，重写了后台代码一定记得要重启服务，不然不能编译成可执行的字节码文件
ClassCastException表示类转换错误，你看看有没有地方类型强转错误

Answer 2

java.lang.ClassCastException是强制转换异常
org.apache.catalina.util.DefaultAnnotationProcessor不能转换 org.apache.AnnotationProcessor

Answer 3

java.lang.ClassCastException: 此错误为类型转换错误.是不匹配异常,解决方法,强转型,或者你在tomcat的comtext。xml下添加<Loader delegate="true" /> ，望采纳

Answer 4

500说明是服务器断错误，这说明你的代码有问题，而不是路径问题！很显然错误在JspServletWrapper.java中仔细找找