SpringBoot+Vue解决跨域

1.定义配置类WebConfig

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

@Configuration
public class WebConfig implements WebMvcConfigurer {

    /**
     * 跨域配置
     * @param registry
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        WebMvcConfigurer.super.addCorsMappings(registry);
        registry.addMapping("/**") // 访问所有东西都跨域
                .allowedOrigins("Http://localhost:8080","null") // 8080是前端Vue的端口号
                //.allowedHeaders("*")
                .allowedMethods("POST","GET","PUT","OPTIONS","DELETE") //
                .maxAge(3600) // 最大响应时间
                .allowCredentials(true); // 是否携带信息
    }
}

如果要允许所有源跨域

把 .allowedOrigins("Http://localhost:8080","null") 改成 .allowedOriginPatterns("*")