校验码无法显示的问题

在登录页面显示校验码时，后台提示：

<2010-5-20 ??02?14·?5ī CST> <Error> <HTTP> <BEA-101017> <[ServletContext(id=32812390,name=ebo_query_9501,context-path=/ebo_query)] Root cause of ServletException.
java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
        at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
        at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:134)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
        at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1041)
        at java.awt.image.BufferedImage.getGraphics(BufferedImage.java:1031)
        at jsp_servlet._query.__image._jspService(__image.java:151)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
        at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1077)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:526)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:348)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:7047)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3902)
        at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2773)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
>
<2010-5-20 ??02?14·?4ī CST> <Error> <HTTP> <BEA-101017> <[ServletContext(id=32812390,name=****_9501,context-path=/*****)] Root cause of ServletException.
java.lang.NoClassDefFoundError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
        at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1041)
        at java.awt.image.BufferedImage.getGraphics(BufferedImage.java:1031)
        at jsp_servlet._query.__image._jspService(__image.java:151)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
        at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1077)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
        at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:348)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:7047)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3902)
        at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2773)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)
>

 

解决方案：

需要在weblogic启动脚本中JAVA_OPTS加入

JAVA_OPTS=-Djava.awt.headless=true     （Windows）

JAVA_OPTS -Djava.awt.headless=true        （unix）

 

具体原因：

   需要进一步深入