Java编译 与 运行环境 版本不一样，tomcat报错不许确

tomcat 中的日志

appears to have started a thread named  [com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2] but has failed to stop it. This is very likely to create a memory leak.

maven jetty plugin 报错 

java.lang.UnsupportedClassVersionError: 类名 : Unsupported major.minor ve

出错的缘由是 测试环境是 JDK6的 加载的远程  jar 包 是 本地 JDK7编译的

tomcat 报错 是不对的

测试java7 环境 跑 java6 编译的class 是兼容的