将String转换为JSON对象

Question

是否可以使用JavaScript转换这样的字符串：

"Product : Bike , 2005 : $12000,2006 : $13000,2007 : $14000,2008 : $15000"

到这样的JSON对象：

{
    "Product":"Bike",
    "2005" : $12000,
    "2006" : $13000,
    "2007" : $14000,
    "2008" : $15000
}

Answer 1

假设你的字符串的结构是相同的，用,分割将给你一组键/值对，然后用:分割每一对你将得到键和值。

var str = "Product : Bike , 2005 : $12000,2006 : $13000,2007 : $14000,2008 : $15000"
var obj={};
str.split(",").forEach(function(item){
    var keyVal = item.split(":")
    obj[keyVal[0].trim()] = keyVal[1].trim()
})
console.log(obj)

Answer 2

您可split ,和:上的字符串trim。请确保var string = "Product : Bike , 2005 : $12000,2006 : $13000,2007 : $14000,2008 : $15000"; var result = {}; var duplets = string.split(','); for (var i = 0; i < duplets.length; i++) { var duplet = duplets[i]; var values = duplet.split(':'); result[values[0].trim()] = values[1].trim(); } console.log(result);生成的字符串，因为条款周围还有空格。

var string = "Product : Bike , 2005 : $12000,2006 : $13000,2007 : $14000,2008 : $15000";
var regex = /(?:^|,)([^,:]+):([^,]+)(?=$|,)/g;

var result = {};
while(match = regex.exec(string)) {
  result[match[1].trim()] = match[2].trim();
}
console.log(result);

您还可以使用正则表达式：

(?:^|,)

以下是有关正则表达式的一些信息：

• ^匹配字符串的开头（,）或([^,:]+):
• ,多次匹配除:和:以外的所有字符，直到下一个([^,]+)(?=$|,)并形成第一个选择组
• ,多次匹配除$以外的所有字符，直至字符串,或下一个{{1}}的结尾。它形成了第二个匹配组。

Answer 3

使用replace() with RegExp

细分，regular expression匹配如下：

1. \s*任意数量的空白（包括无）
2. 后跟(\:|,){1} 1 1冒号或\s*逗号
capture group
3. 后跟g任意数量的空格（包括无）
4. 然后标志$1强制匹配所有匹配项，直到字符串结束。

匹配由被引号"包围的捕获值const str = "Product : Bike , 2005 : $12000,2006 : $13000,2007 : $14000,2008 : $15000", json_str = '{"' + str.replace( /\s*(\:|,){1}\s*/g, '"$1"' ) + '"}', js_object = JSON.parse( json_str ); console.log( json_str ); // transportable console.log( js_object ); // useable替换。

这会导致修剪属性名称和值周围的所有前导和尾随空格，并正确引用属性名称和值。
然后，我们只需要在字符串的任一端添加引号和大括号，使其成为有效的JSON字符串，准备好parse()到对象中。

＆＃13;
＆＃13;
//pull html buttons
var playBtn = document.getElementById("playBtn");
var pauseBtn = document.getElementById("pauseBtn");
var stopBtn = document.getElementById("stopBtn");
var backBtn = document.getElementById("backBtn");
var nextBtn = document.getElementById("nextBtn");
var index = 0
//make as JukeBox constructor 
function Jukebox(){
    this.jamz = []
}

//be able to add songs to the jukebox
Jukebox.prototype.addSong = function(songs){
    this.jamz.push(songs);
}

//test audio in console log
/*Jukebox.prototype.play = function(){
    var playSong = this.jamz;
    console.log(this.jamz)
}*/

//Be able to push songs into the jukebox. 
//first create a "new" jukebox
var jukebox = new Jukebox();

//use the previous prototype to add songs 

jukebox.addSong(new Audio("audio/Young M.A - OOOUUU.mp3"));
jukebox.addSong(new Audio("audio/J Balvin - Safari.mp3"));
jukebox.addSong(new Audio("audio/Marshmello x Ookay - Chasing Colors.mp3"));
jukebox.addSong(new Audio("audio/Bryson Tiller - Run Me Dry.mp3"));
jukebox.addSong(new Audio("audio/Midnight To Monaco - One In A 
Million.mp3"));


//give each button a method 

Jukebox.prototype.play = function(){
    this.jamz[index].play();
}

Jukebox.prototype.pause = function(){
    this.jamz[index].pause();
}

Jukebox.prototype.stop = function(){
    this.jamz[index].stop();
}
//figured out next button functionality through indexes. go back up top to 
variables and create and index variable
Jukebox.prototype.next= function(){
    this.jamz[index].pause(),
    index++;
    this.jamz[index].currentTime= 0,
    this.jamz[index].play;
    if (index ==this.jamz.length){
        this.index.currentTime = 0;
        this.jamz[index].play();
    }
};

//same functionality as "next except" if statement index will = 0

Jukebox.prototype.back = function() {
  this.jamz[index].pause();
  index--;
  this.jamz[index].currentTime = 0;
  this.jamz[index].play();
  if (index === 0) {
    this.jamz[index].currentTime = 0;
    this.jamz[index].play();
  }
};

//add event listeners to the the buttons I pulled earlier.
playBtn.addEventListener("click", function(event) {
 event.preventDefault();
 jukebox.play();
})

pauseBtn.addEventListener("click", function(event) {
 event.preventDefault();
 jukebox.pause();
})

stopBtn.addEventListener("click", function(event) {
 event.preventDefault();
 jukebox.stop();
 })

nextBtn.addEventListener("click", function(event) {
 event.preventDefault();
 jukebox.forward();
 })

backBtn.addEventListener("click", function(event) {
 event.preventDefault();
 jukebox.back();
 })
＆＃13;
＆＃13;
＆＃13;

Answer 4

JSONParser parser = new JSONParser();
JSONObject json = (JSONObject) parser.parse(stringToParse);