Springboot如何解决前端请求跨域的问题

目录

• Springboot解决前端请求跨域
• 原因
• 解决
• 总结

SpringboovFXrNEROpt解决前端请求跨域

Access to fetch at from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

If an opaque response serves your n编程客栈eeds, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

原因

当前端请求的端口和后端接受请求的端口不一致

解决

创建一个配置文件CorConfig.Java，允许任何的请求头、请求方法访问。

此处是放开后端，允许前端访问，只需要设置访问源地址即可

package com.zhang.demo.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsCophpnfiguration;
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。这里默认1天
        private static final long MAX_AGE = 24 * 60 * 60;
 
 http://www.devze.com       @Bean
        public CorsFilter corsFilter() {
            UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
            CorsConfiguration corsConfiguration = new CorsConfiguratiopythonn();
            corsConfiguration.addAllowedOrigin("http://localhost:8080"); // 1 设置访问源地址(允许这个网站访问后台)
            corsConfiguration.addAllowedHeader("*"); // 2 设置访问源请求头
            corsConfiguration.addAllowedMethod("*"); // 3 设置访问源请求方法
            corsConfiguration.setMaxAge(MAX_AGE);
            source.registerCorsConfiguration("/**", corsConfiguration); // 4 对接口配置跨域设置
            return new CorsFilter(source);
        }
    }
 

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程客栈(www.devze.com)。