Javascript 对象的查询字符串编码

像这样？

序列化 = 函数（obj）{ var str = []; for (var p in obj) if (obj.hasOwnProperty(p)) { str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p])); } 返回 str.join("&"); } console.log(serialize({ foo: "hi there", bar: "100%" })); // foo=hi%20there&bar=100%25

编辑：这个也转换递归对象（使用 php“数组”表示法查询字符串）

序列化 = 函数（obj，前缀）{ var str = [], p; for (p in obj) { if (obj.hasOwnProperty(p)) { var k = prefix ?前缀 + "[" + p + "]" : p, v = obj[p]; str.push((v !== null && typeof v === "object") ? serialize(v, k) : encodeURIComponent(k) + "=" + encodeURIComponent(v)); } } 返回 str.join("&"); } console.log(serialize({ foo: "hi there", bar: { blah: 123, quux: [1, 2, 3] } })); // foo=hi%20there&bar%5Bblah%5D=123&bar%5Bquux%5D%5B0%5D=1&bar%5Bquux%5D%5B1%5D=2&bar%5Bquux%5D%5B2%5D=3

---

只需使用URLSearchParams这个works in all current browsers

new URLSearchParams(object).toString()

---

jQuery 有一个函数，jQuery.param()，如果你已经在使用它，你可以使用它：http://api.jquery.com/jquery.param/

例子：

var params = { width:1680, height:1050 };
var str = jQuery.param( params );

str 现在包含 width=1680&height=1050

---

我建议使用 URLSearchParams 接口：

const searchParams = new URLSearchParams(); const params = {foo: "你好", bar: "100%" }; Object.keys(params).forEach(key => searchParams.append(key, params[key])); console.log(searchParams.toString())

或者通过将搜索对象传递给构造函数，如下所示：

const params = {foo: "你好", bar: "100%" }; const queryString = new URLSearchParams(params).toString(); console.log(queryString);

---

Object.keys(obj).reduce(function(a,k){a.push(k+'='+encodeURIComponent(obj[k]));return a},[]).join('&')

编辑：我喜欢这个单线，但我敢打赌，如果它在语义上与接受的答案相匹配，那将是一个更受欢迎的答案：

function serialize( obj ) {
    let str = '?' + Object.keys(obj).reduce(function(a, k){
        a.push(k + '=' + encodeURIComponent(obj[k]));
        return a;
    }, []).join('&');
    return str;
}

---

这是 ES6 中的单行代码：

Object.keys(obj).map(k => `${encodeURIComponent(k)}=${encodeURIComponent(obj[k])}`).join('&');

---

使用 Node.js v6.6.3

const querystring = require('querystring')

const obj = {
  foo: 'bar',
  baz: 'tor'
}

let result = querystring.stringify(obj)
// foo=bar&baz=tor

参考：https://nodejs.org/api/querystring.html

---

Rails / PHP 样式查询生成器

此方法将 Javascript 对象转换为 URI Query String。还处理嵌套数组和对象（在 Rails / PHP 语法中）：

function serializeQuery(params, prefix) {
  const query = Object.keys(params).map((key) => {
    const value  = params[key];

    if (params.constructor === Array)
      key = `${prefix}[]`;
    else if (params.constructor === Object)
      key = (prefix ? `${prefix}[${key}]` : key);

    if (typeof value === 'object')
      return serializeQuery(value, key);
    else
      return `${key}=${encodeURIComponent(value)}`;
  });

  return [].concat.apply([], query).join('&');
}

示例用法：

let params = {
  a: 100,
  b: 'has spaces',
  c: [1, 2, 3],
  d: { x: 9, y: 8}
}

serializeQuery(params)
// returns 'a=100&b=has%20spaces&c[]=1&c[]=2&c[]=3&d[x]=9&d[y]=8

---

对 user187291 接受的解决方案的一个小修改：

serialize = function(obj) {
   var str = [];
   for(var p in obj){
       if (obj.hasOwnProperty(p)) {
           str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
       }
   }
   return str.join("&");
}

检查对象上的 hasOwnProperty 使 JSLint/JSHint 很高兴，并且如果对象不是简单的字典，它可以防止意外地序列化对象的方法或其他东西。请参阅本页中有关语句的段落：http://javascript.crockford.com/code.html

---

好吧，每个人似乎都把他的单线放在这里，所以这是我的：

const encoded = Object.entries(obj).map(([k, v]) => `${k}=${encodeURIComponent(v)}`).join("&");

---

您需要发送任意对象吗？如果是这样，GET 是个坏主意，因为用户代理和 Web 服务器将接受的 URL 长度是有限的。我的建议是建立一个名称-值对数组来发送，然后建立一个查询字符串：

function QueryStringBuilder() {
    var nameValues = [];

    this.add = function(name, value) {
        nameValues.push( {name: name, value: value} );
    };

    this.toQueryString = function() {
        var segments = [], nameValue;
        for (var i = 0, len = nameValues.length; i < len; i++) {
            nameValue = nameValues[i];
            segments[i] = encodeURIComponent(nameValue.name) + "=" + encodeURIComponent(nameValue.value);
        }
        return segments.join("&");
    };
}

var qsb = new QueryStringBuilder();
qsb.add("veg", "cabbage");
qsb.add("vegCount", "5");

alert( qsb.toQueryString() );

---

这是接受答案的咖啡脚本版本。这可能会为某人节省时间。

serialize = (obj, prefix) ->
  str = []
  for p, v of obj
    k = if prefix then prefix + "[" + p + "]" else p
    if typeof v == "object"
      str.push(serialize(v, k))
    else
      str.push(encodeURIComponent(k) + "=" + encodeURIComponent(v))

  str.join("&")

---

这个跳过空/未定义的值

export function urlEncodeQueryParams(data) {
    const params = Object.keys(data).map(key => data[key] ? `${encodeURIComponent(key)}=${encodeURIComponent(data[key])}` : '');
    return params.filter(value => !!value).join('&');
}

---

稍微好看一点

objectToQueryString(obj, prefix) {
    return Object.keys(obj).map(objKey => {
        if (obj.hasOwnProperty(objKey)) {
            const key = prefix ? `${prefix}[${objKey}]` : objKey;
            const value = obj[objKey];

            return typeof value === "object" ?
                this.objectToQueryString(value, key) :
                `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
        }

        return null;
    }).join("&");
}

---

这是一个简洁的 & Object.entries 的递归版本。它处理任意嵌套的数组，但不处理嵌套对象。它还删除空元素：

const format = (k,v) => v !== null ? `${k}=${encodeURIComponent(v)}` : ''

const to_qs = (obj) => {
    return [].concat(...Object.entries(obj)
                       .map(([k,v]) => Array.isArray(v) 
                          ? v.map(arr => to_qs({[k]:arr})) 
                          : format(k,v)))
           .filter(x => x)
           .join('&');
}

例如：

let json = { 
    a: [1, 2, 3],
    b: [],              // omit b
    c: 1,
    d: "test&encoding", // uriencode
    e: [[4,5],[6,7]],   // flatten this
    f: null,            // omit nulls
    g: 0
};

let qs = to_qs(json)

=> "a=1&a=2&a=3&c=1&d=test%26encoding&e=4&e=5&e=6&e=7&g=0"

---

在 ES7 中，您可以在一行中编写：

const serialize = (obj) => (Object.entries(obj).map(i => [i[0], encodeURIComponent(i[1])].join('=')).join('&'))

---

const toQueryString = obj => "?".concat(Object.keys(obj).map(e => `${encodeURIComponent(e)}=${encodeURIComponent(obj[e])}`).join("&"));

const data = {
  offset: 5,
  limit: 10
};

toQueryString(data); // => ?offset=5&limit=10

或使用预定义的功能

const data = {
  offset: 5,
  limit: 10
};

new URLSearchParams(data).toString(); // => ?offset=5&limit=10

笔记

如果您不想设置查询参数，如果值为空，则上述两种方法都会将值设置为空，如果不存在则使用

const toQueryString = obj => "?".concat(Object.keys(obj).map(e => obj[e] ? `${encodeURIComponent(e)}=${encodeURIComponent(obj[e])}` : null).filter(e => !!e).join("&"));


const data = {
  offset: null,
  limit: 10
};

toQueryString(data); // => "?limit=10" else with above methods "?offset=null&limit=10"

您可以自由使用任何方法

---

单行将对象转换为查询字符串，以防有人再次需要它

let Objs = { a: 'obejct-a', b: 'object-b' }

Object.keys(objs).map(key => key + '=' + objs[key]).join('&')

// result will be a=object-a&b=object-b

---

我有一个更简单的解决方案，它不使用任何第三方库，并且已经易于在任何具有“Object.keys”的浏览器中使用（也就是所有现代浏览器 + edge + ie）：

在 ES5 中

function(a){
    if( typeof(a) !== 'object' ) 
        return '';
    return `?${Object.keys(a).map(k=>`${k}=${a[k]}`).join('&')}`;
}

在 ES3 中

function(a){
    if( typeof(a) !== 'object' ) 
        return '';
    return '?' + Object.keys(a).map(function(k){ return k + '=' + a[k] }).join('&');
}

---

一个 JAVASCRIPT 对象的查询字符串编码的 ES6 解决方案

const params = {
  a: 1,
  b: 'query stringify',
  c: null,
  d: undefined,
  f: '',
  g: { foo: 1, bar: 2 },
  h: ['Winterfell', 'Westeros', 'Braavos'],
  i: { first: { second: { third: 3 }}}
}

static toQueryString(params = {}, prefix) {
  const query = Object.keys(params).map((k) => {
    let key = k;
    const value = params[key];

    if (!value && (value === null || value === undefined || isNaN(value))) {
      value = '';
    }

    switch (params.constructor) {
      case Array:
        key = `${prefix}[]`;
        break;
      case Object:
        key = (prefix ? `${prefix}[${key}]` : key);
        break;
    }

    if (typeof value === 'object') {
      return this.toQueryString(value, key); // for nested objects
    }

    return `${key}=${encodeURIComponent(value)}`;
  });

  return query.join('&');
}

toQueryString(参数)

"a=1&b=query%20stringify&c=&d=&f=&g[foo]=1&g[bar]=2&h[]=Winterfell&h[]=Westeros&h[]=Braavos&i[first][second][third]=3"

---

如果您想递归地转换嵌套对象，并且该对象可能包含也可能不包含数组（并且数组可能包含对象或数组等），那么解决方案会变得更复杂一些。这是我的尝试。

我还添加了一些选项来选择是否要记录每个对象成员在其位于主对象中的深度，以及选择是否要为来自转换数组的成员添加标签。

理想情况下，您应该测试 thing 参数是否真的接收到对象或数组。

function thingToString(thing,maxDepth,recordLevel,markArrays){
    //thing: object or array to be recursively serialized
    //maxDepth (int or false):
    // (int) how deep to go with converting objects/arrays within objs/arrays
    // (false) no limit to recursive objects/arrays within objects/arrays
    //recordLevel (boolean):
    //  true - insert "(level 1)" before transcript of members at level one (etc)
    //  false - just 
    //markArrays (boolean):
    //  insert text to indicate any members that came from arrays
    var result = "";
    if (maxDepth !== false && typeof maxDepth != 'number') {maxDepth = 3;}
    var runningDepth = 0;//Keeps track how deep we're into recursion

    //First prepare the function, so that it can call itself recursively
    function serializeAnything(thing){
        //Set path-finder values
        runningDepth += 1;
        if(recordLevel){result += "(level " + runningDepth + ")";}

        //First convert any arrays to object so they can be processed
        if (thing instanceof Array){
            var realObj = {};var key;
            if (markArrays) {realObj['type'] = "converted array";}
            for (var i = 0;i < thing.length;i++){
                if (markArrays) {key = "a" + i;} else {key = i;}
                realObj[key] = thing[i];
            }
            thing = realObj;
            console.log('converted one array to ' + typeof realObj);
            console.log(thing);
        }

        //Then deal with it
        for (var member in thing){
            if (typeof thing[member] == 'object' && runningDepth < maxDepth){
                serializeAnything(thing[member]);
                //When a sub-object/array is serialized, it will add one to
                //running depth. But when we continue to this object/array's
                //next sibling, the level must go back up by one
                runningDepth -= 1;
            } else if (maxDepth !== false && runningDepth >= maxDepth) {
                console.log('Reached bottom');
            } else 
            if (
                typeof thing[member] == "string" || 
                typeof thing[member] == 'boolean' ||
                typeof thing[member] == 'number'
            ){
                result += "(" + member + ": " + thing[member] + ") ";
            }  else {
                result += "(" + member + ": [" + typeof thing[member] + " not supported]) ";
            }
        }
    }
    //Actually kick off the serialization
    serializeAnything(thing);

    return result;

}

---

添加可接受的解决方案，这适用于对象和对象数组：

parseJsonAsQueryString = function (obj, prefix, objName) {
    var str = [];
    for (var p in obj) {
        if (obj.hasOwnProperty(p)) {
            var v = obj[p];
            if (typeof v == "object") {
                var k = (objName ? objName + '.' : '') + (prefix ? prefix + "[" + p + "]" : p);
                str.push(parseJsonAsQueryString(v, k));
            } else {
                var k = (objName ? objName + '.' : '') + (prefix ? prefix + '.' + p : p);
                str.push(encodeURIComponent(k) + "=" + encodeURIComponent(v));
                //str.push(k + "=" + v);
            }
        }
    }
    return str.join("&");
}

如果您使用像 asp.net mvc 操作方法中的对象参数，还添加了 objName。

---

我做了一个comparison of JSON stringifiers，结果如下：

JSON:    {"_id":"5973782bdb9a930533b05cb2","isActive":true,"balance":"$1,446.35","age":32,"name":"Logan Keller","email":"logankeller@artiq.com","phone":"+1 (952) 533-2258","friends":[{"id":0,"name":"Colon Salazar"},{"id":1,"name":"French Mcneil"},{"id":2,"name":"Carol Martin"}],"favoriteFruit":"banana"}
Rison:   (_id:'5973782bdb9a930533b05cb2',age:32,balance:'$1,446.35',email:'logankeller@artiq.com',favoriteFruit:banana,friends:!((id:0,name:'Colon Salazar'),(id:1,name:'French Mcneil'),(id:2,name:'Carol Martin')),isActive:!t,name:'Logan Keller',phone:'+1 (952) 533-2258')
O-Rison: _id:'5973782bdb9a930533b05cb2',age:32,balance:'$1,446.35',email:'logankeller@artiq.com',favoriteFruit:banana,friends:!((id:0,name:'Colon Salazar'),(id:1,name:'French Mcneil'),(id:2,name:'Carol Martin')),isActive:!t,name:'Logan Keller',phone:'+1 (952) 533-2258'
JSURL:   ~(_id~'5973782bdb9a930533b05cb2~isActive~true~balance~'!1*2c446.35~age~32~name~'Logan*20Keller~email~'logankeller*40artiq.com~phone~'*2b1*20*28952*29*20533-2258~friends~(~(id~0~name~'Colon*20Salazar)~(id~1~name~'French*20Mcneil)~(id~2~name~'Carol*20Martin))~favoriteFruit~'banana)
QS:      _id=5973782bdb9a930533b05cb2&isActive=true&balance=$1,446.35&age=32&name=Logan Keller&email=logankeller@artiq.com&phone=+1 (952) 533-2258&friends[0][id]=0&friends[0][name]=Colon Salazar&friends[1][id]=1&friends[1][name]=French Mcneil&friends[2][id]=2&friends[2][name]=Carol Martin&favoriteFruit=banana
URLON:   $_id=5973782bdb9a930533b05cb2&isActive:true&balance=$1,446.35&age:32&name=Logan%20Keller&email=logankeller@artiq.com&phone=+1%20(952)%20533-2258&friends@$id:0&name=Colon%20Salazar;&$id:1&name=French%20Mcneil;&$id:2&name=Carol%20Martin;;&favoriteFruit=banana
QS-JSON: isActive=true&balance=%241%2C446.35&age=32&name=Logan+Keller&email=logankeller%40artiq.com&phone=%2B1+(952)+533-2258&friends(0).id=0&friends(0).name=Colon+Salazar&friends(1).id=1&friends(1).name=French+Mcneil&friends(2).id=2&friends(2).name=Carol+Martin&favoriteFruit=banana

其中最短的是URL Object Notation。

---

这是一个适用于 .NET 后端的开箱即用解决方案。我已经采用了该线程的主要答案并对其进行了更新以适应我们的 .NET 需求。

function objectToQuerystring(params) {
var result = '';

    function convertJsonToQueryString(data, progress, name) {
        name = name || '';
        progress = progress || '';
        if (typeof data === 'object') {
            Object.keys(data).forEach(function (key) {
                var value = data[key];
                if (name == '') {
                    convertJsonToQueryString(value, progress, key);
                } else {
                    if (isNaN(parseInt(key))) {
                        convertJsonToQueryString(value, progress, name + '.' + key);
                    } else {
                        convertJsonToQueryString(value, progress, name + '[' + key+ ']');
                    }
                }
            })
        } else {
            result = result ? result.concat('&') : result.concat('?');
            result = result.concat(`${name}=${data}`);
        }
    }

    convertJsonToQueryString(params);
    return result;
}

---

似乎直到现在还没有人提到另一个流行的图书馆 qs。你可以添加它

$ yarn add qs

然后像这样使用它

import qs from 'qs'

const array = { a: { b: 'c' } }
const stringified = qs.stringify(array, { encode: false })

console.log(stringified) //-- outputs a[b]=c

---

以更好的方式做到这一点。

它可以处理 STANDARD 查询形式（如 a=val&b[0]=val&b[1]=val&c=val&d[some key]=val）中的递归对象或数组，这是最终函数。

逻辑、功能

const objectToQueryString = (initialObj) => {
  const reducer = (obj, parentPrefix = null) => (prev, key) => {
    const val = obj[key];
    key = encodeURIComponent(key);
    const prefix = parentPrefix ? `${parentPrefix}[${key}]` : key;

    if (val == null || typeof val === 'function') {
      prev.push(`${prefix}=`);
      return prev;
    }

    if (['number', 'boolean', 'string'].includes(typeof val)) {
      prev.push(`${prefix}=${encodeURIComponent(val)}`);
      return prev;
    }

    prev.push(Object.keys(val).reduce(reducer(val, prefix), []).join('&'));
    return prev;
  };

  return Object.keys(initialObj).reduce(reducer(initialObj), []).join('&');
};

例子

const testCase1 = {
  name: 'Full Name',
  age: 30
}

const testCase2 = {
  name: 'Full Name',
  age: 30,
  children: [
    {name: 'Child foo'},
    {name: 'Foo again'}
  ],
  wife: {
    name: 'Very Difficult to say here'
  }
}

console.log(objectToQueryString(testCase1));
console.log(objectToQueryString(testCase2));

现场测试

展开下面的代码片段以在您的浏览器中验证结果 -

const objectToQueryString = (initialObj) => { const reducer = (obj, parentPrefix = null) => (prev, key) => { const val = obj[key]; key = encodeURIComponent(key);常量前缀 = 父前缀？ `${parentPrefix}[${key}]` ：键； if (val == null || typeof val === 'function') { prev.push(`${prefix}=`);返回上一页； } if (['number', 'boolean', 'string'].includes(typeof val)) { prev.push(`${prefix}=${encodeURIComponent(val)}`);返回上一页； } prev.push(Object.keys(val).reduce(reducer(val, prefix), []).join('&'));返回上一页； };返回 Object.keys(initialObj).reduce(reducer(initialObj), []).join('&'); }; const testCase1 = { name: 'Full Name', age: 30 } const testCase2 = { name: 'Full Name', age: 30, children: [ {name: 'Child foo'}, {name: 'Foo again'} ], wife: { name: '这里很难说' } } console.log(objectToQueryString(testCase1)); console.log(objectToQueryString(testCase2));

要考虑的事情。

它跳过函数的值，null，undefined

它跳过空对象和数组的键和值。

它不处理使用 new Number(1) 或 new String('my string') 生成的 Number 或 String 对象，因为没有人应该这样做

---

如果您有很多嵌套对象，上述答案将不起作用。相反，您可以从这里选择函数参数 - https://github.com/knowledgecode/jquery-param/blob/master/jquery-param.js 它对我来说效果很好！

    var param = function (a) {
    var s = [], rbracket = /\[\]$/,
        isArray = function (obj) {
            return Object.prototype.toString.call(obj) === '[object Array]';
        }, add = function (k, v) {
            v = typeof v === 'function' ? v() : v === null ? '' : v === undefined ? '' : v;
            s[s.length] = encodeURIComponent(k) + '=' + encodeURIComponent(v);
        }, buildParams = function (prefix, obj) {
            var i, len, key;

            if (prefix) {
                if (isArray(obj)) {
                    for (i = 0, len = obj.length; i < len; i++) {
                        if (rbracket.test(prefix)) {
                            add(prefix, obj[i]);
                        } else {
                            buildParams(prefix + '[' + (typeof obj[i] === 'object' ? i : '') + ']', obj[i]);
                        }
                    }
                } else if (obj && String(obj) === '[object Object]') {
                    for (key in obj) {
                        buildParams(prefix + '[' + key + ']', obj[key]);
                    }
                } else {
                    add(prefix, obj);
                }
            } else if (isArray(obj)) {
                for (i = 0, len = obj.length; i < len; i++) {
                    add(obj[i].name, obj[i].value);
                }
            } else {
                for (key in obj) {
                    buildParams(key, obj[key]);
                }
            }
            return s;
        };

    return buildParams('', a).join('&').replace(/%20/g, '+');
};

---

好的，这是一个较旧的帖子，但我正面临这个问题，我找到了我的个人解决方案..也许可以帮助其他人..

     function objToQueryString(obj){
        var k = Object.keys(obj);
        var s = "";
        for(var i=0;i<k.length;i++) {
            s += k[i] + "=" + encodeURIComponent(obj[k[i]]);
            if (i != k.length -1) s += "&";
        }
        return s;
     };

---

我为此编写了一个包：object-query-string :)

支持嵌套对象、数组、自定义编码函数等。轻量级和 jQuery 免费。

// TypeScript
import { queryString } from 'object-query-string';

// Node.js
const { queryString } = require("object-query-string");

const query = queryString({
    filter: {
        brands: ["Audi"],
        models: ["A4", "A6", "A8"],
        accidentFree: true
    },
    sort: 'mileage'
});

返回

filter[brands][]=Audi&filter[models][]=A4&filter[models][]=A6&filter[models][]=A8&filter[accidentFree]=true&sort=milage

---

在这里查看了一些最佳答案之后，我编写了另一个解决一些边缘情况的实现

function serialize(params, prefix) {                
    return Object.entries(params).reduce((acc, [key, value]) => {
        // remove whitespace from both sides of the key before encoding
        key = encodeURIComponent(key.trim());

        if (params.constructor === Array ) {
          key = `${prefix}[]`;
        } else if (params.constructor === Object) {
          key = (prefix ? `${prefix}[${key}]` : key);
        }

        /**
         *  - undefined and NaN values will be skipped automatically
         *  - value will be empty string for functions and null
         *  - nested arrays will be flattened
         */
        if (value === null || typeof value === 'function') {
            acc.push(`${key}=`);
        } else if (typeof value === 'object') {
            acc = acc.concat(serialize(value, key));
        } else if(['number', 'boolean', 'string'].includes(typeof value) && value === value) { // self-check to avoid NaN
            acc.push(`${key}=${encodeURIComponent(value)}`);
        }

        return acc;
    }, []);
}

function objectToQueryString(queryParameters) {
    return queryParameters ? serialize(queryParameters).join('&'): '';
}

let x = objectToQueryString({
    foo: 'hello world',
    bar: {
      blah: 123,
      list: [1, 2, 3],
        'nested array': [[4,5],[6,7]] // will be flattened
    },
    page: 1,
    limit: undefined, // field will be ignored
    check: false,
    max: NaN, // field will be ignored
    prop: null,
    ' key value': 'with spaces' // space in key will be trimmed out
});
  
console.log(x); // foo=hello%20world&bar[blah]=123&bar[list][]=1&bar[list][]=2&bar[list][]=3&bar[nested%20array][][]=4&bar[nested%20array][][]=5&bar[nested%20array][][]=6&bar[nested%20array][][]=7&page=1&check=false&prop=&key%20value=with%20spaces

---