获取url传来的参数
//根据传递过来的参数name获取对应的值 function getParameter(name) { var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i"); var r = location.search.substr(1).match(reg); if (r!=null) return (r[2]); return null; }
转:https://www.cnblogs.com/appcx/p/6962130.html
js获取url(request)中的参数
index.htm?参数1=数值1&参数2=数值2&参数3=数据3&参数4=数值4&......
静态html文件js读取url参数,根据获取html的参数值控制html页面输出。
一、字符串分割分析法。
这里是一个获取URL带REQUESTRING参数的JAVASCRIPT客户端解决方案。
相当于asp的request.querystring,PHP的$_GET,jsp的request.getParameter
//var USERCODE="<%=request.getParameter("USERCODE")%>";
//以上是用request.getParameter在浏览器端获取参数值, 也可以是用该方法在服务器端获取参数方法
函数:
<Script language="javascript"> function GetRequest() { var url = location.search; //获取url中含"?"符后的字串 var theRequest = new Object(); if (url.indexOf("?") != -1) { var str = url.substr(1); strs = str.split("&"); for(var i = 0; i < strs.length; i ++) { theRequest[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]); } } return theRequest; } </Script>
然后我们通过调用此函数获取对应参数值:
<Script language="javascript"> var Request = new Object(); Request = GetRequest(); var 参数1,参数2,参数3,参数N; 参数1 = Request['参数1']; 参数2 = Request['参数2']; 参数3 = Request['参数3']; 参数N = Request['参数N']; </Script>
以此获取url串中所带的同名参数
二、正则分析法。
function GetQueryString(name) { var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i"); var r = window.location.search.substr(1).match(reg); if (r!=null) return unescape(r[2]); return null; } alert(GetQueryString("参数名1")); alert(GetQueryString("参数名2")); alert(GetQueryString("参数名3"));
三、java举例如下:
1、 <%@ page language="java" import="java.util.*,com.servlet.bean" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <body> <script type="text/javascript"> <% ArrayList list = (ArrayList)request.getAttribute("list"); for(int i=0;i<list.size();i++){ bean Bean = (bean)list.get(i); %> var name = '<%=Bean.getName()%>' //这里是从request获取参数,赋值给name这个变量 <% } %> </script> </body> </html> 2、在servlet服务端的代码如下: package com.servlet; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class servlet extends HttpServlet { public servlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { bean Bean = new bean(); Bean.setName("liubin"); Bean.setPwd("123"); bean Bean2 = new bean(); Bean2.setName("aaa"); Bean2.setPwd("456"); bean Bean3 = new bean(); Bean3.setName("bbb"); Bean3.setPwd("789"); ArrayList list = new ArrayList(); list.add(Bean); list.add(Bean2); list.add(Bean3); request.setAttribute("list", list); request.getRequestDispatcher("../index.jsp").forward(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request ,response); } public void init() throws ServletException { // Put your code here } }
四、
javascript可以通过window.navigator来进行判断。不同的浏览器navigator对象里的名称是不同的:
window.navigator.userAgent 记录浏览器信息以及操作系统信息。
1.取变量值
var a = '<%=request.getAttribute("aaa");%>' ;
2.也可以将这个值放在页面上.再取出来.
<input type="hidden" value="<%=request.getAttribute("aaa");%>" id="aaa"/>
var a = document.getElementById('aaa').value ;
(注):对于对象,我推荐使用第二种方法.这样可以在页面中不IMPORT JAVA类..更符合现在编程
eg:
<input type="hidden" value="${student.name}" id="stuName"/>
var stuName = $('stuName').value ; // prototype.js新功能,简写.