Spring MVC跨域问题及解决

@CrossOrigin({"http://localhost:8081", "http://localhost:8082"})
@GetMapping("/request")
public Student rest1(HttpServletResponse response) {
  Student student = new Student();
  student.setName("GET晓龙");
  student.setAge(23);
  student.setBirthday(new Date());
  return student;
}

public class CrossOriginFilter implements Filter {
  
  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    // 转化响应
    HttpServletResponse response = (HttpServletResponse) servletResponse;
    // 设置响应头，设置允许访问为全部
    response.setHeader("Access-Control-Allow-Origin", "*");
    // 放行
    filterChain.doFilter(servletRequest, response);
  }
}

<!--配置mvc的跨域访问-->
<mvc:cors>
  <!--
    映射中对应的就是我们的请求url，配置哪一条允许跨域访问
    allowed-origins  =>允许访问的请求
    allowed-methods  =>允许访问的方式
    max-age          =>预检请求缓存时间
    -->
  <mvc:mapping path="/rest/**" allowed-origins="*" allowed-methods="POST" max-age="1888"/>
</mvc:cors>

@Override
public void addCorsMappings(CorsRegistry registry) {
  /*
     * 在注册处添加Mapping，参数值就是对应配置文件里面path
     * 然后就可以一直去点，对应的配置xml里面的属性
     */
  registry.addMapping("/rest/**")
          .allowedOrigins("*")
          .allowedMethods("POST")
          .maxAge(1811);
}