Hello, in the weather.html page(example for profeesional JSP), I keyed in 
the zipcode "11111" and choose "all fields" for the query field, the hit 
submit. However, an error page is shown, saying:


A Servlet Exception Has Occurred
org.apache.jasper.JasperException: Unable to compile class for 
JSPC:\Program Files\Apache Group\jakarta-
tomcat\.\work\localhost\projsp\ch19\errorpage_jsp.java:80: Class 
org.apache.jsp.PrintWriter not found.
                 exception.printStackTrace(new PrintWriter(out)); 
                                               ^
1 error

	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
	at org.apache.jasper.servlet.JspServlet.loadJSP
(JspServlet.java:501)
	at 
org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary
(JspServlet.java:175)
	at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service
(JspServlet.java:187)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:357)
	at org.apache.jasper.servlet.JspServlet.service
(JspServlet.java:431)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.catalina.core.ApplicationDispatcher.invoke
(ApplicationDispatcher.java:534)
	at org.apache.catalina.core.ApplicationDispatcher.doForward
(ApplicationDispatcher.java:325)
	at org.apache.catalina.core.ApplicationDispatcher.forward
(ApplicationDispatcher.java:262)
	at org.apache.jasper.runtime.PageContextImpl.forward
(PageContextImpl.java:398)
	at org.apache.jasper.runtime.PageContextImpl.handlePageException
(PageContextImpl.java:431)
	at org.apache.jsp.weather_jsp._jspService(weather_jsp.java:181)
	at org.apache.jasper.runtime.HttpJspBase.service
(HttpJspBase.java:107)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service
(JspServlet.java:200)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:357)
	at org.apache.jasper.servlet.JspServlet.service
(JspServlet.java:431)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:246)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:191)
	at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:255)
	at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
	at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:879)
	at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:225)
	at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
	at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:879)
	at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2175)
	at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:164)
	at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
	at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:446)
	at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
	at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:879)
	at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:162)
	at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
	at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
	at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:879)
	at org.apache.catalina.connector.http.HttpProcessor.process
(HttpProcessor.java:827)
	at org.apache.catalina.connector.http.HttpProcessor.run
(HttpProcessor.java:904)
	at java.lang.Thread.run(Thread.java:484)

Can somebody tell me what is wrong with my configuration or in any other 
area? Your help is much appreciated. Thank you in advanced.