tomcat 跨域的配置

* 允许所有跨域 

E:\apache-tomcat-7.0.81\conf\web.xml 

<filter>
  <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>

　　

* 跨域 <= 改http response header

Access-Control-Allow-Credentials: true
Access-Control-Allow-Origin: http://www.mediamix.cn:8088

　Access-Control-Allow-Origin 这个字段对应的值 设定为前端项目部署的url