HTTP Status 500 - org.apache.jasper.JasperException: 问题怎么解决 有偿

Question

HTTP Status 500 - org.apache.jasper.JasperException: java.lang.NullPointerException
type Exception reportmessage org.apache.jasper.JasperException: java.lang.NullPointerExceptiondescription The server encountered an internal error that prevented it from fulfilling this request.exceptionorg.apache.jasper.JasperException: org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
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:723)
root causeorg.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:430)
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:723)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
org.apache.jsp.index_jsp._jspService(index_jsp.java:129)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
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:723)
root causejava.lang.NullPointerException
com.frameworkset.common.poolman.util.SQLManager.getDBAdapter(SQLManager.java:337)
org.frameworkset.persitent.util.SQLUtil.getSQL(SQLUtil.java:174)
com.frameworkset.common.poolman.ConfigSQLExecutor.getSql(ConfigSQLExecutor.java:56)
com.frameworkset.common.poolman.ConfigSQLExecutor.queryListBeanWithDBName(ConfigSQLExecutor.java:528)
com.frameworkset.common.poolman.ConfigSQLExecutor.queryListBean(ConfigSQLExecutor.java:398)
com.runsi.system.adverts.dao.impl.AdvertDaoImpl.showfrontadvt(AdvertDaoImpl.java:82)
com.runsi.system.adverts.service.impl.AdvertServiceImpl.showfrontadvt(AdvertServiceImpl.java:80)
org.apache.jsp.header_jsp._jspService(header_jsp.java:142)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
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:723)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
org.apache.jsp.index_jsp._jspService(index_jsp.java:129)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
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:723)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.41 logs.式了很多种方法还是解决不了

Answer 1

没有源码只能吧代码放tomcat里面跑  这种错误

Answer 2

并且，最好贴出你报错的那行代码：也就是  AdvertDaoImpl.java:82------>这个应该是你写的源代码吧。

Answer 3

org.apache.jasper.JasperException：org.apache.jasper.JasperException：java.lang.NullPointerException 主要问题是这个吧，NullPointerException

Answer 4

没有代码只能推测了，应该是你后台查出的数据是null，然后前台页面直接显示的时候没有考虑到null导致报错的

Answer 5

NullPointer应该是挺好处理的一种exception了，实在不行就一步步System看数据有没有输入进去，数据库数据有没有拿到。