- 论坛徽章:
- 0
|
我是JSP初学者,在从书上抄一个例子后,执行时出错,是怎么回事?
有三个文件
check.html
<html>;
<head>;
<title>;JavaBean实例</title>;
</head>;
<BODY bgcolor="white">;
<FORM MOTHED=POST ACTION=checkresult.jsp>;
<br>;
<h3>;
<font color="green">;
请选择你喜欢的编程语言:</h3>;<br>;
<input TYPE=checkbox name=languge VALUE=C++>; C++
;
<input TYPE=checkbox name=languge VALUE=VB>; VB
;
<input TYPE=checkbox name=languge VALUE=Java>; Java
;
<input TYPE=checkbox name=languge VALUE=JSP>; JSP
;
<input TYPE=checkbox name=languge VALUE=ASP>; ASP
;
<input TYPE=checkbox name=languge VALUE=PHP>; PHP
;
<input TYPE=checkbox name=languge VALUE=DelphiC++>; Delphi
;
<br>; <input TYPE=submit name=submit VALUE="确定">;
<INPUT TYPE=reset name=reset VALUE="重来">;
</font>;
</FORM>;
</BODY>;
</html>;
checkresult.jsp
</head>;
<body bgcolor="white">;
<%! String[] language; %>;
<jsp:useBean id="foo" scope="page" class="checkbox.check" />;
<jsp:setProperty name="foo" property="language" param="language" />;
<font color="green">;您所喜欢的编程序语言是:
</font>;<br>;
<font color="red">;
<%
language = foo.getlanguage();
%>;
<ul>;
<%
if (!language[0].equals("1" )
{
for (int i=0;i<language.length;i++)
{
%>;
<li>;
<%
out.println(language);
}
}else out.println("none seleceted!";
%>;
</ul>;
</font>;
</body>;
</html>;
check.java
package checkbox;
public class check
{
String b[]= new String[] {"1","2","3","4"};
public String[] getlanguage()
{
return b;
}
public void setlanguage(String[] b)
{
this.b=b;
}
}
我在IE上执行
http://localhost:8081/check.html
后,按SUBMIT调用checkresult.jsp时出现下面的错误,是怎么回事?
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 6 in the jsp file: /checkresult.jsp
Generated servlet error:
[javac] Compiling 1 source file
C:\Tomcat 4.1\work\Standalone\localhost\_\checkresult_jsp.java:49: 不能解析符号
符号：类 check
位置：包 in checkbox
checkbox.check foo = null;
^
An error occurred at line: 6 in the jsp file: /checkresult.jsp
Generated servlet error:
C:\Tomcat 4.1\work\Standalone\localhost\_\checkresult_jsp.java:51: 不能解析符号
符号：类 check
位置：包 in checkbox
foo = (checkbox.check) pageContext.getAttribute("foo", PageContext.PAGE_SCOPE);
^
An error occurred at line: 6 in the jsp file: /checkresult.jsp
Generated servlet error:
C:\Tomcat 4.1\work\Standalone\localhost\_\checkresult_jsp.java:54: 不能解析符号
符号：类 check
位置：包 in checkbox
foo = (checkbox.check) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "checkbox.check";
^
3 个错误
at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:130)
at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:293)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:340)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:352)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:474)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:184)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
at java.lang.Thread.run(Thread.java:484)
 |
|
免费注册
发表于 2003-02-12 13:35
发表于 2003-02-13 19:13