Java开发网 - 有关jsp配置的问题，急！急！急！急！

Topic: 有关jsp配置的问题，急！急！急！急！

1.有关jsp配置的问题，急！急！急！急！

Posted by: yeehya
Posted on: 2004-05-19 22:13

小的初学jsp。我用的tomcat4.0.1,这是在mapxtreme4.5 for java（一种用于制作基于web的GIS工具软件）中自带的，和我以前用的tomcat版本有点不同。出了点问题，我以http://localhost:8080可以打开tomcat的主页面。可以用html页面，调用applet，也能直接访问servlet。但是访问.jsp文件时，就会报错，而且错误时相同的，都是如下的：
TYPE: Exception report
MESSAGE: Internal Server Error
Description: The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request
=============================================

Exception:
javax.servlet.ServletException: Servlet.init() for servlet jsp threw exception
  at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:871)
  at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:615)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:371)
  at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:424)
  at java.lang.Thread.run(Thread.java:536)
=============================================
Root cause:
java.lang.ClassCastException: org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
  at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:103)
  at org.apache.jasper.parser.ParserUtils.parseXMLDocument(ParserUtils.java:183)
  at org.apache.jasper.compiler.TldLocationsCache.processWebDotXml(TldLocationsCache.java:165)
  at org.apache.jasper.compiler.TldLocationsCache.(TldLocationsCache.java:138)
  at org.apache.jasper.EmbededServletOptions.(EmbededServletOptions.java:324)
  at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:266)
  at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:852)
  at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:615)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
  at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
  at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
  at org.apache.ajp.tomcat4.Ajp13Processor.process(Ajp13Processor.java:371)
  at org.apache.ajp.tomcat4.Ajp13Processor.run(Ajp13Processor.java:424)
  at java.lang.Thread.run(Thread.java:536)
=============================================
希望高人指教呀！~

2.Re:有关jsp配置的问题，急！急！急！急！ [Re: yeehya]	Copy to clipboard
Posted by: whirl79 Posted on: 2004-05-19 23:04 你在jsp页面中一定调用了servlet，在servlet中的init()方法，可能写错了，你调试一下

3.Re:有关jsp配置的问题，急！急！急！急！ [Re: yeehya]

Copy to clipboard

Posted by: yeehya
Posted on: 2004-05-20 09:53

public void init()
throws ServletException
{
String strParam = getInitParameter("mapxtremeurl");
if(strParam != null && strParam.length() > 0)
mapxtremeurl = strParam;
strParam = getInitParameter("imgtype");
if(strParam != null && strParam.length() > 0)
imgtype = strParam;
strParam = getInitParameter("imgsizex");
if(strParam != null && strParam.length() > 0)
imgsizex = (new Integer(strParam)).intValue();
strParam = getInitParameter("imgsizey");
if(strParam != null && strParam.length() > 0)
imgsizey = (new Integer(strParam)).intValue();
strParam = getInitParameter("smallimgsizex");
if(strParam != null && strParam.length() > 0)
smallimgsizex = (new Integer(strParam)).intValue();
strParam = getInitParameter("smallimgsizey");
if(strParam != null && strParam.length() > 0)
smallimgsizey = (new Integer(strParam)).intValue();
strParam = getInitParameter("imgbgcolor");
if(strParam != null && strParam.length() > 0)
imgbgcolor = new Color((new Integer(strParam)).intValue());
strParam = getInitParameter("datasource");
if(strParam != null && strParam.length() > 0)
datasource = strParam;
if(datasource == null)
errset("请指定数据源类型");
else
if(datasource.equals("oracle"))
{
strParam = getInitParameter("database");
if(strParam != null && strParam.length() > 0)
database = strParam;
if(database == null)
errset("请指定数据库url");
strParam = getInitParameter("dbusername");
if(strParam != null && strParam.length() > 0)
dbusername = strParam;
strParam = getInitParameter("dbpassword");
if(strParam != null && strParam.length() > 0)
dbpassword = strParam;
strParam = getInitParameter("dbtable");
if(strParam != null && strParam.length() > 0)
dbtable = strParam;
strParam = getInitParameter("dbnamecol");
if(strParam != null && strParam.length() > 0)
dbnamecol = strParam;
strParam = getInitParameter("dbmapdefcol");
if(strParam != null && strParam.length() > 0)
dbmapdefcol = strParam;
} else
if(datasource.equals("file"))
{
strParam = getInitParameter("filetype");
if(strParam != null && strParam.length() > 0)
filetype = strParam;
if(filetype.equals("mdf"))
{
strParam = getInitParameter("mdfpath");
if(strParam != null && strParam.length() > 0)
mdfpath = strParam;
if(mdfpath == null)
errset("请指定mdf地图定义文件路径");
} else
{
strParam = getInitParameter("gstpath");
if(strParam != null && strParam.length() > 0)
gstpath = strParam;
if(gstpath == null)
errset("请指定gst地图定义文件路径");
}
}
strParam = getInitParameter("mapdef");
if(strParam != null && strParam.length() > 0)
mapdef = strParam;
if(mapdef == null)
errset("请指定地图定义名称");
try
{
MapJ tempmap = initMapJ();
resetpoint = tempmap.getCenter();
resetzoom = tempmap.getZoom();
}
catch(Exception e)
{
e.printStackTrace();
}
}
这是servlet中init()是不是有问题呀`？