按照网上方式给项目 web.xml 文件里添加如下 CorsFilter 过滤器

    <filter>         <filter-name>CorsFilter</filter-name>         <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>         <init-param>             <param-name>cors.allowed.origins</param-name>             <param-value>*</param-value>         </init-param>         <init-param>             <param-name>cors.allowed.methods</param-name>             <param-value>GET,POST,HEAD,OPTIONS,PUT</param-value>         </init-param>         <init-param>             <param-name>cors.allowed.headers</param-name>             <param-value>Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers</param-value>         </init-param>         <init-param>             <param-name>cors.exposed.headers</param-name>             <param-value>Access-Control-Allow-Origin,Access-Control-Allow-Methods</param-value>         </init-param>          <init-param>             <param-name>cors.preflight.maxage</param-name>             <param-value>10</param-value>         </init-param>     </filter>     <filter-mapping>         <filter-name>CorsFilter</filter-name>         <url-pattern>/*</url-pattern>     </filter-mapping> 

但是 Access-Control-Allow-Methods: GET,POST,HEAD,OPTIONS,PUT 这个头死活上不去(如图)，有没有大佬知道是什么原因呀？

大佬有話說 (0)