1 public class SimpleCORSFilter implements Filter{   2    3     @Override   4     public void destroy() {   5            6     }   7    8     @Override   9     public void doFilter(ServletRequest req, ServletResponse res,  10             FilterChain chain) throws IOException, ServletException {  11             HttpServletResponse response = (HttpServletResponse) res;  12             response.setHeader("Access-Control-Allow-Origin", "*");  13             response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");  14             response.setHeader("Access-Control-Max-Age", "3600");  15             response.setHeader("Access-Control-Allow-Headers", "x-requested-with");  16             chain.doFilter(req, res);  17           18     }  19   20     @Override  21     public void init(FilterConfig arg0) throws ServletException {  22           23     }  24   25 }

web.xml配置

1 
     
        2       
      
       cors
        3       
      
       com.ssm.web.filter.SimpleCORSFilter
        4     
       5     
     
        6       
      
       cors
        7       
      
       /*
        8