找到的OpenLayers跨域访问WFS服务出现No'Access

在eclipse中部署了一个使用OpenLayers的Java web项目CrossDomainTest，容器为Tomcat 7.0.56.（http://localhost:8080/CrossDomainTest/index.html） 利用Geoserver 2.5.2使用内置容器jetty 6.18发布WFS服务.(http://localhost:8888/geoserver/wfs). 从localh

在eclipse中部署了一个使用OpenLayers的Java web项目CrossDomainTest，容器为Tomcat 7.0.56.（http://localhost:8080/CrossDomainTest/index.html）

利用Geoserver 2.5.2使用内置容器jetty 6.18发布WFS服务.(http://localhost:8888/geoserver/wfs).

从localhost:8080访问localhost:8888的WFS无法得到预期效果，通过chrome浏览器开发者工具发现错误：No 'Access-Control-Allow-Origin' header is present on the requested resource. 查阅发现是所谓的Javascript安全性导致的“跨域问题”，找了很多的解决方法，比如设置cgi代理，CORS（跨域资源共享）等我都尝试了但不知为何没有成功，限于时间关系没有仔细追究，最后找到[Geoserver-users] CORS for jetty 6.1.8 (Geoserver 2.x), solved这篇文章，按其设置解决了问题：

解决方案步骤为：

1.从这里下载ZIP文件，解压后放到\webapps\geoserver\WEB-INF\classes文件夹中。

2.向\webapps\geoserver\WEB-INF\文件夹中的web.xml文件中增加如下配置文件允许所有域的跨域资源共享
 
      cross-origin
      org.mortbay.servlets.CrossOriginFilter
  
 allowedOrigins
 *
  
      
       allowedMethods
       GET,POST
      
      
       allowedHeaders
       x-requested-with,content-type
      
    
	
        cross-origin
        /*
    

I was looking on Geoserver cross domain support (no-proxy) recently and I
managed to get it working by compiling custom filter for Jetty 6.1.8. The
filter is based on CrossOriginFilter which is supplied with newer versions
of jetty-servlets.jar. I have fixed some white-space bugs and tested it
with OpenLayers 2.12, IE, FF and Chrome.

You can follow the same rules as described here:
http://wiki.eclipse.org/Jetty/Feature/Cross_Origin_Filter but:

1.Do not include the jar. Instead, put content of this archive
http://shanbe.hezoun.com/cors.zip into the
\webapps\geoserver\WEB-INF\classes folder.
2. use org.mortbay.servlets.CrossOriginFilter
 insteand of
org.eclipse.jetty.servlets.CrossOriginFilter
3. do not use additional spaces in allowedHeaders defs (like this:
"x-request-with, content-type")

You can put follwing conf. inside the \webapps\geoserver\web.xml
to allow CORS requests from all domains:


      cross-origin
      org.mortbay.servlets.CrossOriginFilter
  
 allowedOrigins
 *
  
      
       allowedMethods
       GET,POST
      
      
       allowedHeaders
       x-requested-with,content-type
      
    
...
 
        cross-origin
        /*
    

..restart the geoserver and it should work.