NULL ， 0 ，empty

@PathVariable

Method not found: '!!0[] System.Array.Empty()'.

MyBatis报错 Parameter '0' not found. Available parameters are [arg1, arg0, param1, param2]

ValueError: empty range for randrange() (1,1, 0)

openfeign报错RequestParam.value() was empty on parameter 0

@param

@RequestParam 和 @PathVariable

Parameter ‘xxx‘ not found.Available parameters are[arg1,agr0,param1,param2]

@PathVariable和@RequestParam