验证码突然无法显示,并报如下错误。
Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:195) at java.awt.GraphicsEnvironment.createGE(GraphicsEnvironment.java:102) at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:81) at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1182) at cn.com.chinautrust.idm.component.ValidateCode.createCode(ValidateCode.java:114) at cn.com.chinautrust.idm.component.ValidateCode.<init>(ValidateCode.java:99) at cn.com.chinautrust.idm.component.ValidateCodeUtils.getImg(ValidateCodeUtils.java:71) at cn.com.chinautrust.idm.controller.login.VerificationCode.getValidateImgCode(VerificationCode.java:33) at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) ... 43 more
在catalina.sh里加上一句“-Djava.awt.headless=true ”,问题解决。
经查,出现这种情况一般就是启动tomcat的用户无法访问Xserver,包括Xserver没有启动或者没有权限访问.
修改${TOMCAT_HOME}/bin/catalina.sh或${TOMCAT_HOME}/bin/catalina.bat文件:
在所有类似以下代码:
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH"
-Djava.security.manager
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy
-Dcatalina.base="$CATALINA_BASE"
-Dcatalina.home="$CATALINA_HOME"
-Djava.io.tmpdir="$CATALINA_TMPDIR"
在尾部加上一句:
-Djava.awt.headless=true
修改后内容如下:
exec "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH"
-Dcatalina.base="$CATALINA_BASE"
-Dcatalina.home="$CATALINA_HOME"
-Djava.io.tmpdir="$CATALINA_TMPDIR"
-Djava.awt.headless=true
以tomcat6.0为例,总共有八处这样的地方,修改好后即可。