Exception in thread “http-bio-8080-exec-9” java.lang.InternalError: Can’t connect to X11 window server using ‘localhost:10.0’ as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$100(X11GraphicsEnvironment.java:52)
at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:155)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:171)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1135)
at java.awt.image.BufferedImage.getGraphics(BufferedImage.java:1125)
at caff.util.vcode.ImageVcodeUtil.getVcodeInner(ImageVcodeUtil.java:72)
at caff.util.vcode.ImageVcodeUtil.getVcode(ImageVcodeUtil.java:36)
at caff.web.servlet.vcodeimage.ImageVcodeServlet.doGet(ImageVcodeServlet.java:25)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
原因分析：因为用到图像处理，JAVA程序会去寻找Linux上的图形界面是否启动。
解决：不让java去寻找Linux图形界面即可，在java启动的时候加入：java -Djava.awt.headless=true
实现：在tomcat配置文件中/usr/local/tomcat/bin/catalina.sh中任意段添加：
JAVA_OPTS=-Djava.awt.headless=true
echo “Using CATALINA_BASE: $CATALINA_BASE”
echo “Using CATALINA_HOME: $CATALINA_HOME”
echo “Using CATALINA_TMPDIR: $CATALINA_TMPDIR”
echo “Using RUNJAVA: $_RUNJAVA”
echo “Using JAVA_OPTS: $JAVA_OPTS”
重启之后JAVA启动不再需要检测。
