利用form的target属性屏蔽url跳转

target:

规定在何处打开 action URL。

关键点:

让target指向隐藏的iframe

form.jsp

<%@ page language="java" cOntentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>










id:



id值:

handler.jsp

<%@ page language="java" cOntentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
String method=request.getParameter("method");
if("add".equals(method)){
	String id =request.getParameter("id");
	out.println("");
}
%>