1.查看jdk和编译设置

1.1选择要发布的项目右键属性
Project facet Java version 1.8 is not supported myeclipse
1.2修改为jdk1.7
Project facet Java version 1.8 is not supported myeclipse
1.3 修改为1.7
Project facet Java version 1.8 is not supported myeclipse
1.4修改为1.7
Project facet Java version 1.8 is not supported myeclipse
以上如果都不可以,直接修改要发不到的tomcat,设置tomcat的jdk版本为jdk1.8
Project facet Java version 1.8 is not supported myeclipse
Project facet Java version 1.8 is not supported myeclipse

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