这个错误的可能原因是什么?

ruir 2004-09-03 09:50:52

代码中加入这两行就抱错:
<jsp:useBean id="ifreportbean" scope="session" class="report.wapCreateReport" />
<jsp:setProperty name="ifreportbean" property="*" />
不加就没问题.

HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: ch/ess/excel/ExcelFile
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:244)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

root cause

java.lang.NoClassDefFoundError: ch/ess/excel/ExcelFile
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:1610)
java.lang.Class.getConstructor0(Class.java:1922)
java.lang.Class.newInstance0(Class.java:278)
java.lang.Class.newInstance(Class.java:261)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1212)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1116)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Generator.generate(Generator.java:3261)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:461)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:442)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:430)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:274)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.25 logs.

--------------------------------------------------------------------------------

Apache Tomcat/5.0.25

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ruir 2004-09-09

高手帮忙啊!

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bloodwar 2004-09-06

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ruir 2004-09-06

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ruir 2004-09-06

谢谢啦!

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xfcy2003 2004-09-03

同意yswift的意见.因为你在
<jsp:useBean id="ifreportbean" scope="session" class="report.wapCreateReport" />
<jsp:setProperty name="ifreportbean" property="*" />
中调用一个构造函数,这个构造函数会调用默认构造函数，所以会出这个问题。

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yswift 2004-09-03

java.lang.Class.privateGetDeclaredConstructors(Class.java:1610)
有默认构造函数吗?

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ruir 2004-09-03

这两个.java文件在Jbuilder里面编译通过了没有抱错。怎么会找不到呢？

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learnner 2004-09-03

WEB-INF\classes\ch\ess\excel\ExcelFile.class有！
WEB-INF\classes\report\wapCreateReport.class有！

后者找不到前者，看看包封装

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yangzuyu12 2004-09-03

classpath 问题

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ruir 2004-09-03

servlet.jar应该没问题的。我可以运行struts.

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vision2000 2004-09-03

CLASSPATH 里加载 servlet.jar？

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Shires 2004-09-03

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ruir 2004-09-03

WEB-INF\classes\ch\ess\excel\ExcelFile.class有！
WEB-INF\classes\report\wapCreateReport.class有！

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ruir 2004-09-03

WEB-INF\src\ch\ess\excel\ExcelFile.java
有!

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yashucn 2004-09-03

NoClassDefFoundError 肯定没有找到你用的这个bean

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ruir 2004-09-03

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ruir 2004-09-03

全局变量就这些：
protected static String category_head="<th bgcolor=\"#CCCCFF\">";
protected static String category_end="</th>";
protected static String cell_head="<td align=\"left\" bgcolor=\"#FFFFFF\"><font color=\"#000000\">";
protected static String cell_end="</font></td>";
private WapUtils wapUtils=new WapUtils();
protected String xsl_path="http://"+wapUtils.getHostIp()+":8080/html/wap/wap_report.xsl";
其余是几十个方法

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