response.setHeader("Refresh","0"+url)不能redirect另一个网页?

Question

a.jsp中:
String url="http://localhost:8080/test/b.jsp";//想从a.jsp转到b.jsp,可是只刷新a.jsp,而不跳转到b.jsp.
response.setHeader("Refresh","5"+url);怎么实现网页几秒后跳转的功能?

Answer 1

response.setHeader("Refresh","5;URL");

Answer 2

还是不行.以下三种情况都是刷新本页,但不跳转到response.setHeader("refresh","3;"+url);response.setHeader("refresh","3;b.jsp");String url="http://localhost:8080/test/b.jsp";
response.setHeader("refresh","3;"+url);