java后端解决跨域问题

新建一个filter

 

public class SimpleCORSFilter implements Filter{  

    @Override  
    public void destroy() {      
    } 
 
    @Override  
    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);  
          
    }  
 
    @Override  
    public void init(FilterConfig arg0) throws ServletException {  
    }  
  
} 

 

另外web.xml中增加如下配置

  
    cors  
    com.ssm.web.filter.SimpleCORSFilter  
  
  
    cors  
    /*