js获取URL里的参数

/** 
 * 获取指定的URL参数值 
 * URL:http://www.xxx.com/index?name=123
 * 参数：param URL参数 
 * 调用方法:getParam("name") 
 * 返回值:123
 * alert(getParam(‘date‘));
 */ 
function getParam(name) {  
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");  
　　//search,查询？后面的参数，并匹配正则
    var r = location.search.substr(1).match(reg);  
　　if (r != null) return decodeURI(decodeURI(r[2])); 
}

/** 
 * js获取url参数值
 * 思路，通过location的search获取url中问号后面的值，字符串过滤掉问号，再通过split方法分割参数集合、循环赋值、匹配对应的参数，最后返回值
 * URL:http://www.xxx.com/index?name=123
 * 参数：param URL参数 
 * 调用方法:getUrlParams("name") 
 * 返回值:123
 * alert(getUrlParams(‘date‘));
 */ 
function getUrlParams(name) { // 不传name返回所有值，否则返回对应值
    var url = window.location.search;
    if (url.indexOf(‘?‘) == 1) { return false; }
    url = url.substr(1);
    url = url.split(‘&‘);
    var name = name || ‘‘;
    var nameres;
    // 获取全部参数及其值
    for(var i=0;i<url.length;i++) {
        var info = url[i].split(‘=‘);
        var obj = {};
        obj[info[0]] = decodeURI(info[1]);
        url[i] = obj;
    }
    // 如果传入一个参数名称，就匹配其值
    if (name) {
        for(var i=0;i<url.length;i++) {
            for (const key in url[i]) {
                if (key == name) {
                    nameres = url[i][key];
                }
            }
        }
    } else {
        nameres = url;
    }
    // 返回结果
    return nameres;
}

const url = ‘http://www.abc.com/test.php?id=1&from=index‘;
var res = getUrlParams();
var res1 = getUrlParams(‘id‘);
console.log(res); //  [{id: "1"}, {from: "index"}]
console.log(res1); // 1

/**
 * [获取URL中的参数名及参数值的集合]
 * 示例URL:http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明
 * @param {[string]} urlStr [当该参数不为空的时候，则解析该url中的参数集合]
 * @return {[string]}       [参数集合]
 */
function GetRequest(urlStr) {
    if (typeof urlStr == "undefined") {
        var url = decodeURI(location.search); //获取url中"?"符后的字符串
    } else {
        var url = "?" + urlStr.split("?")[1];
    }
    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]] = decodeURI(strs[i].split("=")[1]);
        }
    }
    return theRequest;
}

 var parms_1 = GetRequest();
2 console.log(parms_1); // {"uid":"admin","rid":"1","fid":"2","name":"小明"}
3 console.log(parms_1[‘name‘]); // ‘小明‘
4 var parms_2 = GetRequest(‘http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明‘);
5 console.log(parms_2); // {"uid":"admin","rid":"1","fid":"2","name":"小明"}
6 console.log(parms_2[‘name‘]); // ‘小明‘

/**
 * [通过参数名获取url中的参数值]
 * 示例URL:http://htmlJsTest/getrequest.html?uid=admin&rid=1&fid=2&name=小明
 * @param  {[string]} queryName [参数名]
 * @return {[string]}           [参数值]
 */
function GetQueryValue(queryName) {
    var query = decodeURI(window.location.search.substring(1));
    var vars = query.split("&");
    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split("=");
        if (pair[0] == queryName) { return pair[1]; }
    }
    return null;
}

1 var queryVal=GetQueryValue(‘name‘);
2 console.log(queryVal);// 小明