Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'userController' method
到这里, Ambiguous(有歧义的) mapping(映射). Cannot map 'user ...
原文：java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'waterQuality
如果一个项目中有两个 RequestMapping xxx 完全相同就会报 java.lang.IllegalStateException 改进办法：修改 RequestMapping ...
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