前后端分离跨域问题的解决方案

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;

@Configuration
public class CorsConfig {

    // 当前跨域请求最大有效时长。我设置的是一天的时间
    private static final long MAX_AGE = 24 * 60 * 60;

    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); //  设置访问源地址
        corsConfiguration.addAllowedHeader("*"); //  设置访问源请求头
        corsConfiguration.addAllowedMethod("*"); //  设置访问源请求方法
        corsConfiguration.setMaxAge(MAX_AGE);
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); //  对接口配置跨域设置
        return new CorsFilter(source);
    }
}