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.

posted @ 2019-12-05 20:21  悦风旗下  阅读(1234)  评论(0编辑  收藏  举报