public class testFilter implements Filter { 
public void doFilter(ServletRequest request, ServletResponse resp, FilterChain chain) throws IOException, ServletException {HttpServletResponse response = (HttpServletResponse) resp; response.setHeader("Access-Control-Allow-Origin", "*"); //解決跨域訪問報錯 
response.setHeader("Access-Control-Allow-Methods"
 
, "POST, PUT, GET, OPTIONS, DELETE"); 
response.setHeader("Access-Control-Max-Age", "3600"); //設定過期時間 
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, client_id, uuid, Authorization"); 
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"
 
); // 支援HTTP 1.1. 
response.setHeader("Pragma", "no-cache"); // 支援HTTP 1.0. response.setHeader("Expires", "0"); 
chain.doFilter(req, res); 
} 
public void init(FilterConfig filterConfig) {} public void destroy() {}}