SpringBoot解决cors跨域问题

1.使用@CrossOrigin注解实现
 (1).对单个接口配置CORS

 @CrossOrigin(origins = {"*"})
 @PostMapping("/hello")
 @ResponseBody
 public ResultVO hello() {
     return new ResultVO(1,"成功");
 }

(2).对某个Controller下的所有接口配置CORS

@CrossOrigin
@Controller
public class HelloController {

}

2.配置全局的CORS

（1）添加配置类

 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);
     }
 }

（2）添加配置类

 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);
     }
 }

注：添加配置类方法取一即可.