Cannot switch on a value of type String for source level below 1.7. Only convertible int values or e
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Cannot switch on a value of type String for source level below 1.7. Onlyconvertible int values or enum variablesare permitted
一般是因为你导入的项目版本较低导致的；
解决办法：
右键你的项目--->Properties--->Progect Facets--->Java--->将其版本改为1.7及以上即可；
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