java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
请求验证码时后台报错：java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironmentjava
该问题的解决方法：
在Tomcat/bin/catalina.sh 中的JAVA_OPTS选项后增长-Djava.awt.headless=true服务器
对于一个Java服务器来讲常常要处理一些图形元素，例如地图的建立或者图形和图表等。这些API基本上老是须要运行一个X-server以便能使用AWT（Abstract Window Toolkit，抽象窗口工具集）。less
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