@CrossOrigin(origins = {"*"})
 @PostMapping("/hello")

 @ResponseBody

 public ResultVO hello() {

     return new ResultVO(1,"成功");

 }

@CrossOrigin

@Controller

public class HelloController {

}

 package com.yltx.api.config;

 import org.springframework.context.annotation.Bean;

 import org.springframework.context.annotation.Configuration;

 import org.springframework.web.cors.CorsConfiguration;

 import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

 import org.springframework.web.filter.CorsFilter;

 /**

  * @Author: Hujh

  * @Date: 2019/5/9 15:49

  * @Description: Cors跨域配置

  */

 @Configuration

 public class CorsConfig {

     @Bean

     public CorsFilter corsFilter() {

         final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();

         final CorsConfiguration corsConfiguration = new CorsConfiguration();

         corsConfiguration.setAllowCredentials(true);

         corsConfiguration.addAllowedOrigin("*");

         corsConfiguration.addAllowedHeader("*");

         corsConfiguration.addAllowedMethod("*");

         urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);

         return new CorsFilter(urlBasedCorsConfigurationSource);

     }

 }

 import org.springframework.context.annotation.Configuration;

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

 import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

 /**

  * @Author: Hujh

  * @Date: 2019/5/9 16:18

  * @Description:

  */

 @Configuration

 public class WebMvcConfig extends WebMvcConfigurationSupport {

     @Override

     public void addCorsMappings(CorsRegistry registry) {

         registry.addMapping("/**")

                 .allowedOrigins("*")

                 .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")

                 .maxAge(3600)

                 .allowCredentials(true);

     }

 }