One or more constraints have not been satisfied.

1.One or more constraints have not been satisfied.
解决方案:右击项目名称–>找到javaEE tools–>选择Generate、、
2.进入web.xml–>将web-app_3_0.xsd" version="3.0"改为相应版本
[对照着Dynamic的版本修改]One or more constraints have not been satisfied.
3.进入项目的.settings文件夹中打开facet.core/component/修改版本号
One or more constraints have not been satisfied.
One or more constraints have not been satisfied.

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