Spring Boot2.4.x版本解决跨域问题

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import java.util.Collections;

/**
 * 跨域配置类
 * 赵毅梵
 * 2021/9/26
 */
@Configuration
public class CorsConfig {
  @Bean
  public CorsFilter corsFilter() {
    CorsConfiguration corsConfiguration = new CorsConfiguration();
    //1,允许任何来源
    corsConfiguration.setAllowedOriginPatterns(Collections.singletonList("*"));
    //2,允许任何请求头
    corsConfiguration.addAllowedHeader(CorsConfiguration.ALL);
    //3,允许任何方法
    corsConfiguration.addAllowedMethod(CorsConfiguration.ALL);
    //4,允许凭证
    corsConfiguration.setAllowCredentials(true);
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", corsConfiguration);
    return new CorsFilter(source);
  }
}