Java开发网 - 请教一个关于JSP调用BEAN出错的问题！

Topic: 请教一个关于JSP调用BEAN出错的问题！

1.请教一个关于JSP调用BEAN出错的问题！

Posted by: tsizhao
Posted on: 2006-04-06 17:07

问题是这样的。我用MyEclipse+Tomcat建一个J2EE工程，一个JAVABEAN，再有几个JSP页面，在一个JSP页面里调用BEAN时，总是出现如下错误：（Bean在单独测试是正确的。）
type Exception report

message

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

exception

org.apache.jasper.JasperException: /log/web/log_cm.jsp(27,4) The value for the useBean class attribute com.tsizhao.LogBean is invalid.
  org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
  org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
  org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
  org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1227)
  org.apache.jasper.compiler.Node$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:3272)
  org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:244)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
  org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
  org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
  org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
  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:802)

我的JSP页面调程序：
<body>
<jsp:useBean id="handle" class="com.tsizhao.LogBean" scope="request">
<jsp:setProperty name="handle" property="*"/>
</jsp:useBean>
<%
  if (handle.validate()){
%>
<jsp:forward page="success.jsp"></jsp:forward>
<%}
else{
%>
<jsp:forward page="relog.jsp"></jsp:forward>
<%}%>
</body>
被这个问题烦了好久了，，都解决不了。。请知道的指点一下，是不是Eclipse或是Tomcat需要配置什么的呢？

2.Re:请教一个关于JSP调用BEAN出错的问题！ [Re: tsizhao]	Copy to clipboard
Posted by: andylhs Posted on: 2006-04-17 15:20 BEAN要实例化