是否有一种通过jQuery(或不使用)检索查询字符串值的无插件方法?
如果是,怎么办?如果没有,是否有插件可以这样做?
是否有一种通过jQuery(或不使用)检索查询字符串值的无插件方法?
如果是,怎么办?如果没有,是否有插件可以这样做?
当前回答
对于那些想要简短方法(有限制)的人:
location.search.split('myParameter=')[1]
其他回答
这是我自己的看法。第一个函数将URL字符串解码为名称/值对的对象:
url_args_decode = function (url) {
var args_enc, el, i, nameval, ret;
ret = {};
// use the DOM to parse the URL via an 'a' element
el = document.createElement("a");
el.href = url;
// strip off initial ? on search and split
args_enc = el.search.substring(1).split('&');
for (i = 0; i < args_enc.length; i++) {
// convert + into space, split on =, and then decode
args_enc[i].replace(/\+/g, ' ');
nameval = args_enc[i].split('=', 2);
ret[decodeURIComponent(nameval[0])]=decodeURIComponent(nameval[1]);
}
return ret;
};
另外,如果您更改了一些参数,可以使用第二个函数将参数数组放回URL字符串中:
url_args_replace = function (url, args) {
var args_enc, el, name;
// use the DOM to parse the URL via an 'a' element
el = document.createElement("a");
el.href = url;
args_enc = [];
// encode args to go into url
for (name in args) {
if (args.hasOwnProperty(name)) {
name = encodeURIComponent(name);
args[name] = encodeURIComponent(args[name]);
args_enc.push(name + '=' + args[name]);
}
}
if (args_enc.length > 0) {
el.search = '?' + args_enc.join('&');
} else {
el.search = '';
}
return el.href;
};
这是我在GitHub上的查询字符串解析代码版本。
它的前缀是jquery.*,但解析函数本身不使用jquery。它非常快,但仍然可以进行一些简单的性能优化。
它还支持URL中的列表和哈希表编码,例如:
arr[]=10&arr[]=20&arr[]=100
or
hash[key1]=hello&hash[key2]=moto&a=How%20are%20you
jQuery.toQueryParams = function(str, separator) {
separator = separator || '&'
var obj = {}
if (str.length == 0)
return obj
var c = str.substr(0,1)
var s = c=='?' || c=='#' ? str.substr(1) : str;
var a = s.split(separator)
for (var i=0; i<a.length; i++) {
var p = a[i].indexOf('=')
if (p < 0) {
obj[a[i]] = ''
continue
}
var k = decodeURIComponent(a[i].substr(0,p)),
v = decodeURIComponent(a[i].substr(p+1))
var bps = k.indexOf('[')
if (bps < 0) {
obj[k] = v
continue;
}
var bpe = k.substr(bps+1).indexOf(']')
if (bpe < 0) {
obj[k] = v
continue;
}
var bpv = k.substr(bps+1, bps+bpe-1)
var k = k.substr(0,bps)
if (bpv.length <= 0) {
if (typeof(obj[k]) != 'object') obj[k] = []
obj[k].push(v)
} else {
if (typeof(obj[k]) != 'object') obj[k] = {}
obj[k][bpv] = v
}
}
return obj;
}
这些都是很好的答案,但我需要一些更强大的东西,我想你们可能都想拥有我创造的东西。
这是一种简单的库方法,可以对URL参数进行剖析和操作。静态方法有以下子方法,可以在主题URL上调用:
获取主机获取路径获取哈希setHash获取参数获取查询setParam(设置参数)获取参数hasParamremoveParam(删除参数)
例子:
URLParser(url).getParam('myparam1')
var url = "http://www.example.com/folder/mypage.html?myparam1=1&myparam2=2#something";
function URLParser(u){
var path="",query="",hash="",params;
if(u.indexOf("#") > 0){
hash = u.substr(u.indexOf("#") + 1);
u = u.substr(0 , u.indexOf("#"));
}
if(u.indexOf("?") > 0){
path = u.substr(0 , u.indexOf("?"));
query = u.substr(u.indexOf("?") + 1);
params= query.split('&');
}else
path = u;
return {
getHost: function(){
var hostexp = /\/\/([\w.-]*)/;
var match = hostexp.exec(path);
if (match != null && match.length > 1)
return match[1];
return "";
},
getPath: function(){
var pathexp = /\/\/[\w.-]*(?:\/([^?]*))/;
var match = pathexp.exec(path);
if (match != null && match.length > 1)
return match[1];
return "";
},
getHash: function(){
return hash;
},
getParams: function(){
return params
},
getQuery: function(){
return query;
},
setHash: function(value){
if(query.length > 0)
query = "?" + query;
if(value.length > 0)
query = query + "#" + value;
return path + query;
},
setParam: function(name, value){
if(!params){
params= new Array();
}
params.push(name + '=' + value);
for (var i = 0; i < params.length; i++) {
if(query.length > 0)
query += "&";
query += params[i];
}
if(query.length > 0)
query = "?" + query;
if(hash.length > 0)
query = query + "#" + hash;
return path + query;
},
getParam: function(name){
if(params){
for (var i = 0; i < params.length; i++) {
var pair = params[i].split('=');
if (decodeURIComponent(pair[0]) == name)
return decodeURIComponent(pair[1]);
}
}
console.log('Query variable %s not found', name);
},
hasParam: function(name){
if(params){
for (var i = 0; i < params.length; i++) {
var pair = params[i].split('=');
if (decodeURIComponent(pair[0]) == name)
return true;
}
}
console.log('Query variable %s not found', name);
},
removeParam: function(name){
query = "";
if(params){
var newparams = new Array();
for (var i = 0;i < params.length;i++) {
var pair = params[i].split('=');
if (decodeURIComponent(pair[0]) != name)
newparams .push(params[i]);
}
params = newparams;
for (var i = 0; i < params.length; i++) {
if(query.length > 0)
query += "&";
query += params[i];
}
}
if(query.length > 0)
query = "?" + query;
if(hash.length > 0)
query = query + "#" + hash;
return path + query;
},
}
}
document.write("Host: " + URLParser(url).getHost() + '<br>');
document.write("Path: " + URLParser(url).getPath() + '<br>');
document.write("Query: " + URLParser(url).getQuery() + '<br>');
document.write("Hash: " + URLParser(url).getHash() + '<br>');
document.write("Params Array: " + URLParser(url).getParams() + '<br>');
document.write("Param: " + URLParser(url).getParam('myparam1') + '<br>');
document.write("Has Param: " + URLParser(url).hasParam('myparam1') + '<br>');
document.write(url + '<br>');
// Remove the first parameter
url = URLParser(url).removeParam('myparam1');
document.write(url + ' - Remove the first parameter<br>');
// Add a third parameter
url = URLParser(url).setParam('myparam3',3);
document.write(url + ' - Add a third parameter<br>');
// Remove the second parameter
url = URLParser(url).removeParam('myparam2');
document.write(url + ' - Remove the second parameter<br>');
// Add a hash
url = URLParser(url).setHash('newhash');
document.write(url + ' - Set Hash<br>');
// Remove the last parameter
url = URLParser(url).removeParam('myparam3');
document.write(url + ' - Remove the last parameter<br>');
// Remove a parameter that doesn't exist
url = URLParser(url).removeParam('myparam3');
document.write(url + ' - Remove a parameter that doesn\"t exist<br>');
这将从URL字符串中解析变量AND数组。它既不使用正则表达式,也不使用任何外部库。
function url2json(url) {
var obj={};
function arr_vals(arr){
if (arr.indexOf(',') > 1){
var vals = arr.slice(1, -1).split(',');
var arr = [];
for (var i = 0; i < vals.length; i++)
arr[i]=vals[i];
return arr;
}
else
return arr.slice(1, -1);
}
function eval_var(avar){
if (!avar[1])
obj[avar[0]] = '';
else
if (avar[1].indexOf('[') == 0)
obj[avar[0]] = arr_vals(avar[1]);
else
obj[avar[0]] = avar[1];
}
if (url.indexOf('?') > -1){
var params = url.split('?')[1];
if(params.indexOf('&') > 2){
var vars = params.split('&');
for (var i in vars)
eval_var(vars[i].split('='));
}
else
eval_var(params.split('='));
}
return obj;
}
例子:
var url = "http://www.x.com?luckyNums=[31,21,6]&name=John&favFoods=[pizza]&noVal"
console.log(url2json(url));
输出:
[object]
noVal: ""
favFoods: "pizza"
name: "John"
luckyNums:
0: "31"
1: "21"
2: "6"
如果您不想使用JavaScript库,可以使用JavaScript字符串函数来解析window.location。将此代码保存在外部.js文件中,您可以在不同的项目中反复使用它。
// Example - window.location = "index.htm?name=bob";
var value = getParameterValue("name");
alert("name = " + value);
function getParameterValue(param)
{
var url = window.location;
var parts = url.split('?');
var params = parts[1].split('&');
var val = "";
for ( var i=0; i<params.length; i++)
{
var paramNameVal = params[i].split('=');
if ( paramNameVal[0] == param )
{
val = paramNameVal[1];
}
}
return val;
}