Java后台处理ajax跨域请求处理

在配置中添加一个请求过滤器就能够了。

public 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",

                "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires,                                  Content-Type, X-E4M-With");

          chain.doFilter(req, res);

    }

   

    public void init(FilterConfig filterConfig) {}   

    public void destroy() {}

  }