package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; @SpringBootApplication public class DemoApplication { char a = '\u00A0'; public static void main(String[] args) { new SpringApplicationBuilder ( DemoApplication.class) .properties("spring.main.allow-bean-definition-overriding=true") .build() .run(args); } }