Ambiguous mapping. Cannot map 'appController' method

Ambiguous mapping. Cannot map

Ambiguous mapping. Cannot map ‘Controller‘ methodhere is already ‘Controller

Ambiguous mapping found

Groovy - Groovy ambiguous method overload

Invocation of init method failed； nested exception is java.lang.IllegalStateException: Ambiguous···

解决idea中Cannot resolve method ‘setAttribute

Error:java: Can‘t generate mapping method with primitive return type.

运行java报错Cannot find a class with the main method.

cannot be cast to java.util.Map 报错