Feign PathVariable annotation was empty on param 0.

使用Feign的时候,如果参数中带有

@PathVariable形式的参数,则要用value=""标明对应的参数,否则会抛出IllegalStateException异常

如

@PutMapping("/disuseable/{sn}")

ApiResponse disUseAble(@PathVariable String sn);   // wrong

-->

@PutMapping("/disuseable/{sn}")

ApiResponse disUseAble(@PathVariable(value="sn") String sn);  // right