在后端添加配置文件
package com.yixiao.blog.config;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* 对请求跨域进行配置
*/
@Configuration
public class crosConfig implements WebMvcConfigurer {
@Override
public void addCorsMappings(CorsRegistry registry){
registry.addMapping("/**").allowedOrigins("*")
.allowedMethods("GET","HEAD","POST","PUT","DELETE","OPTIONS")
.allowCredentials(true).maxAge(3600).allowedHeaders("*");
}