Tomcat Ajax跨域访问

今天部署自己的solo个人博客devcoder.cn,登录时一直有提示错误信息

Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access. The response had HTTP status code 403.

经查询是由于tomcat配置不支持ajax跨域访问，Google 搜索答案，修改tomcat 的目录下 /usr/local/tomcat/conf/web.xml/ 增加如下内容即可ok

tomcat后端允许跨域访问的配置

<filter-name>CorsFilter</filter-name>  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class></filter><filter-mapping>  <filter-name>CorsFilter</filter-name>  <url-pattern>/*</url-pattern></filter-mapping>