Unsupported major.minor version 52.0 (unable to load class XXX
2018-04-01 11:37
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上次项目上线需要改后端代码，改完编译为.class后放到环境上出现
把本地环境版本降为和环境一致，重新编译，放到测试环境，重启tomcat。问题解决。
另外重启tomcat命令复习一下：
查看tomcat进程ID： ps -ef | grep tomcat，杀死进程：kill -9 XXX. 重启：到bin目录下 ./startup.sh
ps查看进程，-e显示所有进程，-f显示进程ID等， |管道命令，指ps和grep同时执行。grep查找。
kill -9 强制终止进程
Unsupported major.minor version 52.0 (unable to load class XXX
后来发现测试环境上jdk版本为1.7，而本地开发环境jdk版本为1.8。本地版本过高引起的问题把本地环境版本降为和环境一致，重新编译，放到测试环境，重启tomcat。问题解决。
另外重启tomcat命令复习一下：
查看tomcat进程ID： ps -ef | grep tomcat，杀死进程：kill -9 XXX. 重启：到bin目录下 ./startup.sh
ps查看进程，-e显示所有进程，-f显示进程ID等， |管道命令，指ps和grep同时执行。grep查找。
kill -9 强制终止进程
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