一百三十分求解！新手的第一个问题，到{未知的jsp的bean调用错误}中领30分

weizhihui 2004-04-13 10:52:34

web服务器resin

源文件toservlet.jsp 放在doc目录下
<html>
<head>
<title>From JSP to Servlet</title>
<meta http-equiv="Content-Type" content="text/html;charset=gb2312">
</head>
<body bgcolor="#FFFFFF">
<jsp:forward page="/servlet/toJSP"/>
</body>
</html>

源文件toJSP.java 放在doc/WEB-INF/classes下
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class toJSP extends HttpServlet
{
public void doGet(HttpServletRequest request,
HttpServletResponse response)
{
try
{
request.setAttribute("comefrom","Servlet");
getServletConfig().getServletContext().getRequestDispatcher(
"/cw/stj.jsp").forward(request,response);
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
}

\源文件stj.jsp 放在doc/cw/下
<html>
<body bgcolor="white">
<h1>
This page is redir from:
<% out.print(request.getAttribute("comefrom").toString());%>
</h1>
</body>
</html>

运行出错向各位请教

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cucuchen 2004-04-15

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你的程序是完全没错的，我在tomcat4.1.24下运行通过

jianyu807 2004-04-14

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java.lang.IllegalArgumentException

当将非法的参数传递给一方法时，该异常被抛出！！

weizhihui 2004-04-14

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不行啊~！我这里还是出错~！是否需要在某些文件里设置什么东西

cucuchen 2004-04-13

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兄弟，没有什么问题啊，我运行了一下，没错啊！！！
如要讨论
MY QQ：43763062

weizhihui 2004-04-13

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运行错误是500 Servlet Exception
java.lang.IllegalArgumentException: Request cannot be null
at javax.servlet.ServletRequestWrapper.<init>(ServletRequestWrapper.java:95)
at javax.servlet.http.HttpServletRequestWrapper.<init>(HttpServletRequestWrapper.java:87)
at com.caucho.server.connection.RequestAdapter.<init>(RequestAdapter.java:91)
at com.caucho.server.webapp.DispatchRequest.<init>(DispatchRequest.java:67)
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:161)
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:121)
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:98)
at com.caucho.jsp.QPageContext.forward(QPageContext.java:679)
at _toservlet__jsp._jspService(/toservlet.jsp:7)
at com.caucho.jsp.JavaPage.service(JavaPage.java:75)
at com.caucho.jsp.Page.pageservice(Page.java:549)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:184)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:149)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:257)
at com.caucho.server.port.WorkerThread.run(WorkerThread.java:123)
at java.lang.Thread.run(Thread.java:536)

weizhihui 2004-04-13