07.CORS实现 解决前端跨域请求

1.新建配置类WebMvcConfigurer

package com.lvxk.demo.config;

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

/**
 * WebMvcConfigurer CORS实现
 * Description: <br/>
 * date: 2020/5/5 11:47<br/>
 *
 * @author lvxk<br />
 * @since JDK 1.8
 */
@Configuration
public class WebMvcConfigurer implements org.springframework.web.servlet.config.annotation.WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")//允许跨域访问的路径
        .allowedOrigins("*")//允许跨域访问的源
        .allowedMethods("POST","GET","PUT","OPTIONS","DELETE")//允许的请求方法
        .maxAge(168000)//允许头部设置
        .allowCredentials(true);//默认发送cookie
    }
}