After nacos as a distribution center dynamic refresh @RefreshScope add value to null a problem

Before springboot project constants like the following form:

@Component 
added when the central configuration // nacos RefreshScope @ 
public  class the Constants { 
    
    @Value ( "test1 $ {}" )
     public String test1; 
}

Then write test1 = 123 in the configuration file properties in

controller application

@Autowired private Constants constants;

@GetMapping("/test")

public String test(){

logger.info("constants ：{}",constants);------------------------------------------ 1

logger.info ( "Test Center nacos configuration updates in real time: {}" ., Constants test1 ); --------------- 2

return constants.test1;------------------------------------------------- 3

}

Before configuring nacos not used as a center are ok, but after using nacos distribution center, after configured in accordance with springcloud way to start on the problem arises

The problem is at 1 constants is not empty, but the values ​​are null 2,3

Solution:

The upper getter / setter Constants added, and then use the value constants.getTest1 () to get the value