在服务端新建一个配置类：

package com.sdau.camelia.core.config;

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

/** * @ClassName: CorsConfig * @Author: Leo * @Description: 解决跨域问题 * @Date: 12/1/2019 7:30 PM */
@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedMethods("GET", "POST", "PUT", "DELETE", "OPTIONS")
                .maxAge(3600);
    }
}