纠错
麻烦帮我看看这是什么错，谢谢了type Exception report
message java.lang.NullPointerException
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
com.bjsxt.shopping.util.filter.IPFilter.doFilter(IPFilter.java:31)
root cause
java.lang.NullPointerException
com.bjsxt.shopping.category.CategoryService.getCategories(CategoryService.java:102)
org.apache.jsp.Index_jsp._jspService(Index_jsp.java:106)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
com.bjsxt.shopping.util.filter.IPFilter.doFilter(IPFilter.java:31)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.32 logs.
--------------------编程问答-------------------- CategoryService.java 102行有个对象为null --------------------编程问答-------------------- java.lang.NullPointerException
com.bjsxt.shopping.category.CategoryService.getCategories(CategoryService.java:102)
很明显 空指针啊。 --------------------编程问答-------------------- 请问一下应该怎么改呢？？？ --------------------编程问答-------------------- debug一下，就知道哪个为空了 --------------------编程问答-------------------- 谢谢各位了 --------------------编程问答-------------------- Index_jsp.java:106 ::::::关键在这里
到TomCat的WebApp中搜索Index_jsp.java文件 用编辑器打开它 错误在第106行 --------------------编程问答-------------------- 麻烦帮我看看这是什么错，谢谢了
type Exception report
message java.lang.NullPointerException
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
com.bjsxt.shopping.util.filter.IPFilter.doFilter(IPFilter.java:31)
root cause
java.lang.NullPointerException
com.bjsxt.shopping.category.CategoryService.getCategories(CategoryService.java:102)
org.apache.jsp.Index_jsp._jspService(Index_jsp.java:106)
主页读目录结构时出错，是不是没数据？ --------------------编程问答-------------------- 楼主，你怎么改的，我的也是同样的问题。。想让一个完整的项目跑起来不容易啊，各种Exception
补充：Java , Web 开发
