Java跨域问题处理

一 基于WebMvcConfigurerAdapter配置加入Cors的跨域

import org.springframework.context.annotation.Configuration; 
import org.springframework.web.servlet.config.annotation.CorsRegistry; 
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; 


@Configuration 
public class CorsConfig extends WebMvcConfigurerAdapter{ 

  
    @Override
    public void addCorsMappings(CorsRegistry registry)
    {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedHeaders("*")
                .allowedMethods("*")
                .maxAge(3600);
    }
}

二 SpringBoot 配置 CorsFilter
注意： 前端 withCredentials 要为false

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 {
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        // 允许任何域名
        corsConfiguration.addAllowedOrigin("*");
        // 允许任何头
        corsConfiguration.addAllowedHeader("*");
        // 允许任何方法
        corsConfiguration.addAllowedMethod("*");
        return corsConfiguration;
    }

    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        // 注册
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }
}