在@Configuration註解下的類中新增如下配置

@Bean
public WebMvcConfigurer corsConfigurer() {
	return new WebMvcConfigurerAdapter() {
		@Override
		public void addCorsMappings(CorsRegistry registry) {
			registry.addMapping("/some-controller-you-want-to-CORS").allowedOrigins("http://your.front.end.domain.name:your-port");
     	}
	};
}
 

例如：

@SpringBootApplication
@Configuration
public class CrowdsourcingExampleBackEndApplication {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(CrowdsourcingExampleBackEndApplication.class);
        app.setWebApplicationType(WebApplicationType.SERVLET);
        app.run(args);
    }

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**").allowedOrigins("http://localhost:8080");
            }
        };
    }
}