一、设置服务器端，让ajax能直接调用

服务器端设置 tomcat 设置为例： 在web.xml中添加如下过滤器

       
     
      CorsFilter
        
     
      org.apache.catalina.filters.CorsFilter
      
     
       
     
      CorsFilter
        
     
      /*
      
    

二、使用jsonp方式进行

 

三、使用自定义过滤器方式进行

 

新建cors filter文件，

package cn.ac.iscas.pebble.ufe.tools;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Component;@Componentpublic class SimpleCORSFilter implements Filter {    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {        HttpServletResponse response = (HttpServletResponse) res;        response.setHeader("Access-Control-Allow-Origin", "*");        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");        response.setHeader("Access-Control-Max-Age", "3600");        response.setHeader("Access-Control-Allow-Headers", "x-requested-with");        chain.doFilter(req, res);    }    public void init(FilterConfig filterConfig) {}    public void destroy() {}}

然后在web.xml里添加如下内容：

               
        
         cors
                
        
         cn.ac.iscas.pebble.ufe.tools.SimpleCORSFilter
            
               
               
        
         cors
                
        
         /*