tomcat启动 LINUX验证码报错，加入参数 -Djava.awt.headless=true

https://blog.csdn.net/daocaorenjiake/article/details/17610967?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.nonecase&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.nonecase

来源：oschina

链接：https://my.oschina.net/u/4361759/blog/4307507