veu+cesium跨域问题

1.在WEB-INF文件夹下添加lib文件夹，导入两个jar包jetty-servlets-9.4.12.v20180830.jar和jetty-util-9.4.12.v20180830.jar

2.web.xml配置跨域访问

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
   <!-- Uncomment following filter to enable CORS-->
   <filter>
        <filter-name>cross-origin</filter-name>
        <filter-class>org.eclipse.jetty.servlets.CrossOriginFilter</filter-class>
       <init-param>
           <param-name>chainPreflight</param-name>
           <param-value>false</param-value>
       </init-param>
       <init-param>
           <param-name>allowedOrigins</param-name>
           <param-value>*</param-value>
       </init-param>
       <init-param>
           <param-n