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java 的版本异常 Bad version number in .class file

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java.lang.UnsupportedClassVersionError: Bad version number in .class file


这是java的编译的版本问题,把版本改成一致的就可以了,例如jdk 和jre都设为6.0。在myeclipse的配置信息里,就分别指它的编译级别(complier)和java运行环境(install jre).

如果是web工程,你会很意外的发现,重新启动tomcat之后,这个错误仍然存在。接着,你就在myeclipse里configure sever选择对应的tomcat ,然后选择jdk选项,把tomat使用的jdk也改过来,重新部署,重新启动tomcat,就没问题了。

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