Why jsp throw exception , but error page can' t catch it .

Answer 1

I use japanese Unix.
          so must add follow
          <%@ page contentType="text/html;charset=SJIS" %>
          then error happen
          Jim Clark wrote:
          > I'm not sure what the problem is, but the following works for me in WL5.1
          > SP3 on NT:
          >
          > <%@ page errorPage="testerror.jsp" %>
          > <h1>hello</h1>
          > <%
          > String yes = "yes";
          > if ( yes.equals("yes")) throw new IllegalStateException("yes");
          > %>
          >
          > The page that shows is my testerror.jsp. Double check your page directive
          > specifying your error page.
          >
          > --
          > Jim Clark
          > Idea Integration
          > http://www.idea.com
          >
          > "yang" <[email protected]> wrote in message news:[email protected]...
          > > I use error page , but jsp have exception . error page not catch it.
          > >
          > > throw follow exception only
          > >
          > > ? 6 19 19:01:03 JST 2000:<E> <ServletContext-General> Servlet failed
          > > with Exception
          > >
          > > java.lang.IllegalStateException: Attempt to change ContentType after
          > > calling getWriter() (cannot cha
          > > nge charset from 'SJIS' to 'null')
          > > at java.lang.Throwable.fillInStackTrace(Native Method)
          > > at java.lang.Throwable.fillInStackTrace(Compiled Code)
          > > at java.lang.Throwable.<init>(Compiled Code)
          > > at java.lang.Exception.<init>(Compiled Code)
          > > at java.lang.RuntimeException.<init>(Compiled Code)
          > > at java.lang.IllegalStateException.<init>(Compiled Code)
          > > at
          > > weblogic.servlet.internal.ServletResponseImpl.setEncoding(Compiled Code)
          > >
          > > at
          > > weblogic.servlet.internal.ServletResponseImpl.setContentType(Compiled
          > > Code)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
          > > at
          > > weblogic.servlet.internal.RequestDispatcherImpl.forward(Compiled Code)
          > > at weblogic.servlet.jsp.PageContextImpl.forward(Compiled Code)
          > > at
          > > jsp_servlet._aeonmarket._loan._W_95_AEL032._jspService(Compiled Code)
          > > at weblogic.servlet.jsp.JspBase.service(Compiled Code)
          > > at
          > > weblogic.servlet.internal.ServletStubImpl.invokeServlet(Compiled Code)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled
          > > Code)
          > > at
          > > weblogic.servlet.internal.ServletContextImpl.invokeServlet(Compiled
          > > Code)
          > > at
          > > weblogic.servlet.internal.ServletContextManager.invokeServlet(Compiled
          > > Code)
          > > at weblogic.socket.MuxableSocketHTTP.invokeServlet(Compiled
          > > Code)
          > > at weblogic.socket.MuxableSocketHTTP.execute(Compiled Code)
          > > at weblogic.kernel.ExecuteThread.run(Compiled Code)
          > >