package com.unisinsight.uss.bcs.common.config;

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;

/**
 * 全局配置CorsConfig 处理跨域
 *
 * @Author xiangchao
 * @create 2020/8/24 15:24
 */
@Configuration
public class CorsConfig {
    @Bean
    public CorsFilter corsFilter() {
        // 添加CORS配置信息
        CorsConfiguration config = new CorsConfiguration();
        // 放行哪些原始域
        config.addAllowedOrigin("*");
        // 是否发送Cookie信息
        config.setAllowCredentials(true);
        // 放行哪些原始域(请求方式)
        config.addAllowedMethod("*");
        // 放行哪些原始域(头部信息)
        config.addAllowedHeader("*");

        // 添加映射路径
        UrlBasedCorsConfigurationSource configSource = new UrlBasedCorsConfigurationSource();
        configSource.registerCorsConfiguration("/**", config);

        // 返回新的CorsFilter.
        return new CorsFilter(configSource);
    }
}

或者：

@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedMethods("GET", "POST", "DELETE", "PUT","PATCH")
                .maxAge(3600);
    }
}

2只想单个类或者方法启动跨域用

@CrossOrigin就可以了