javax.servlet.jsp.jspexception无法解析为此类型

重: Servlet.service() for servlet [default] in context with path [/dtsix] threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:626)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:205)
at utils.CopyRightFilter.doFilter(CopyRightFilter.java:34)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:383)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:288)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
2012-5-8 11:04:13 org.apache.catalina.core.StandardWrapperValve invoke
代码是：
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
arg2.doFilter(arg0, arg1);
PrintWriter out=arg1.getWriter();
out.println("
版权所有：ABC有限责任公司");
if(date!=null){
out.println("
"+date+"");
}
out.close();
}
我按照网上的回答操作,但还是解决不了问题,这是怎么回事啊?

ServletContext context = servlet.getServletContext();什么意思?为什么要这样写,作用是什么

英语翻译
500 Servlet Exception
java.lang.NumberFormatException:For input string:".20077E4.20077E4"
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1224)
at java.lang.Double.parseDouble(Double.java:482)
at java.text.DigitList.getDouble(DigitList.java:141)
at java.text.DecimalFormat.parse(DecimalFormat.java:1276)
at java.text.SimpleDateFormat.subParse(SimpleDateFormat.java:1375)
at java.text.SimpleDateFormat.parse(SimpleDateFormat.java:1124)
at java.text.DateFormat.parse(DateFormat.java:333)
at org.mycommon.util.Util.strtodatetime(Util.java:515)
at org.mysso.client.imp.SocketSSOClient.PropertiesToUser(SocketSSOClient.java:398)
at org.mysso.client.imp.SocketSSOClient.find(SocketSSOClient.java:435)
at com.marryfive.common.helper.SSOHelper.hasSignOned(SSOHelper.java:131)
at com.marryfive.common.filter.SSOFilter.doFilter(SSOFilter.java:88)
at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229)
at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:419)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:389)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:507)
at com.caucho.util.ThreadPool.run(ThreadPool.java:433)
at java.lang.Thread.run(Thread.java:595)
--------------------------------------------------------------------------------
Resin-3.0.19 (built Mon,15 May 2006 04:50:47 PDT)

错误提示：严重:Servlet.service() for servlet [jsp] in context with path [/Test_3] threw exception [An exception occurred processing JSP page /login.jsp at line 15
12:
13:
14:
15:username:

16:password :

17:
18:
Stacktrace:] with root cause
javax.servlet.jsp.JspException:Cannot find bean:"org.apache.struts.taglib.html.BEAN" in any scope
x05at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
x05at org.apache.struts.taglib.html.BaseFieldTag.prepareValue(BaseFieldTag.java:121)
x05at org.apache.struts.taglib.html.BaseFieldTag.renderInputElement(BaseFieldTag.java:102)
x05at org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:81)
x05at org.apache.jsp.login_jsp._jspx_meth_html_005ftext_005f0(login_jsp.java:129)
x05at org.apache.jsp.login_jsp._jspService(login_jsp.java:91)
x05at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
x05at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
x05at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
x05at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
x05at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
x05at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
x05at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
x05at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
x05at
代码：
My JSP 'login.jsp' starting page
x05
username:

password: