求解 - JEECMS官方论坛|开源java cms,jsp cms,jsp bbs

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1# 发表于:2014-03-22 22:06:48 IP:222.234.*.*

严重: Servlet.service() for servlet Jcaptcha threw exception
java.lang.NoClassDefFoundError: Could not initialize class javax.imageio.ImageTypeSpecifier
at javax.imageio.ImageIO.write(ImageIO.java:1467)
at javax.imageio.ImageIO.write(ImageIO.java:1565)
at com.jeecms.common.captcha.JcaptchaServlet.doGet(JcaptchaServlet.java:56)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:212)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Thread.java:619)

求解哪里的问题