跨域问题

1.跨域

XMLHttpRequest cannot load http://zhanglihong:8090/iserver/services/data-world/rest/data/featureResults.json?returnContent=true&fromIndex=0&toIndex=19. 
The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed. Origin 'null' is therefore not allowed access.