type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception java.lang.NullPointerException
java.lang.String.indexOf(String.java:1564)
java.lang.String.indexOf(String.java:1546)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:158)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:100)
org.apache.struts.taglib.logic.ConditionalTagBase.doStartTag(ConditionalTagBase.java:174)
admin.host.hosts_jsp._jspService(hosts_jsp.java:178)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.webapp.admin.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
java.lang.String.indexOf(String.java:1564)
java.lang.String.indexOf(String.java:1546)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:158)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:100)
org.apache.struts.taglib.logic.ConditionalTagBase.doStartTag(ConditionalTagBase.java:174)
admin.host.hosts_jsp._jspService(hosts_jsp.java:178)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.webapp.admin.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs.
java.lang.NullPointerException
java.lang.String.indexOf(String.java:1564)
java.lang.String.indexOf(String.java:1546)
先检查这个错误再说。
大约是某个类还没有够造出它的对象,而你又用了它的引用
type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception java.lang.NullPointerException
java.lang.String.indexOf(String.java:1564)
java.lang.String.indexOf(String.java:1546)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:158)
org.apache.struts.taglib.logic.MatchTag.condition(MatchTag.java:100)
org.apache.struts.taglib.logic.ConditionalTagBase.doStartTag(ConditionalTagBase.java:174)
admin.host.hosts_jsp._jspService(hosts_jsp.java:178)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.webapp.admin.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.20 logs. 我看别人里面的是有一个默认的“localhost”怎么我的里面没有,我重装了多次,就是没有,同学也不晓得怎么解决,希望大侠给我指点。
把你的jsp文件和struts的配置文件贴出来
空指针异常。参数没有传递过去,设置断点查看下,在哪里出了问题
1 你的TOMCAT没配置好
2 你没开服务器或者工程未加到服务器种
3 你的代码有错,看下错误界面,上面有代码错误提示发生在第几行。