访问请求参数request.getParameter()
访问请求参数request.getParameter()
制作人:全心全意
getParameter()
例:
传递参数页:
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ page import="java.util.Date"%> <%@ page import="java.text.SimpleDateFormat" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>request对象-->访问请求参数1</title> </head> <body> <a href="index1.jsp?id=1&user=">处理页</a> </body> </html>
获取参数页:
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <% String id = request.getParameter("id"); String user = request.getParameter("user"); String pwd = request.getParameter("pwd"); %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>request对象-->访问请求参数2</title> </head> <body> <%-- index.jsp页面中传递了id参数,并且进行了赋值,id值为1 --%> id参数的值为:<%=id %><br/> <%-- index.jsp页面中传递了user参数,却没有赋值,user值为“空白” --%> user参数的值为:<%=user %><br/> <%-- index.jsp页面中没有传递pwd参数,pwd值为null --%> pwd参数的值为:<%=pwd %><br> </body> </html>