该怎么办？执行到上述代码时报一下错误：

Question

2013-11-1 11:14:37 org.apache.catalina.core.StandardWrapperValve invoke严重: Servlet.service() for servlet jsp threw exceptionjava.awt.HeadlessExceptionat sun.awt.HeadlessToolkit.getScreenSize(HeadlessToolkit.java:261)at org.apache.jsp.Main.Main_jsp._jspService(Main_jsp.java:88)at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at hlc.pub.util.CharacterEncoding.doFilter(CharacterEncoding.java:30)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)at java.lang.Thread.run(Thread.java:619)errorUrl=null

Answer 1

把tomat/bin下的catalina.bat中的
set JAVA_OPTS=-Xms256m -Xmx512m -Djava.awt.headless=true
改为
set JAVA_OPTS=-Xms256m -Xmx512m -Djava.awt.headless=falsh
就OK了