JavaScript将XML转成JSON的方法

本文实例讲述了JavaScript将XML转成JSON的方法。分享给大家供大家参考。具体方法如下：

1. JavaScript代码如下：

// Changes XML to JSON

function xmlToJson(xml) {

    // Create the return object

    var obj = {};

    if (xml.nodeType == 1) { // element

        // do attributes

        if (xml.attributes.length > 0) {

        obj["@attributes"] = {};

            for (var j = 0; j < xml.attributes.length; j++) {

                var attribute = xml.attributes.item(j);

                obj["@attributes"][attribute.nodeName] = attribute.nodeValue;

            }

        }

    } else if (xml.nodeType == 3) { // text

        obj = xml.nodeValue;

    }

    // do children

    if (xml.hasChildNodes()) {

        for(var i = 0; i < xml.childNodes.length; i++) {

            var item = xml.childNodes.item(i);

            var nodeName = item.nodeName;

            if (typeof(obj[nodeName]) == "undefined") {

                obj[nodeName] = xmlToJson(item);

            } else {

                if (typeof(obj[nodeName].length) == "undefined") {

                    var old = obj[nodeName];

                    obj[nodeName] = [];

                    obj[nodeName].push(old);

                }

                obj[nodeName].push(xmlToJson(item));

            }

        }

    }

    return obj;

};

2. XML代码：

<ALEXA VER="0.9" URL="davidwalsh.name/" HOME="0" AID="=">

    <SD TITLE="A" FLAGS="" HOST="davidwalsh.name">

        <TITLE TEXT="David Walsh Blog :: PHP, MySQL, CSS, Javascript, MooTools, and Everything Else"/>

        <LINKSIN NUM="1102"/>

        <SPEED TEXT="1421" PCT="51"/>

    </SD>

    <SD>

        <POPULARITY URL="davidwalsh.name/" TEXT="7131"/>

        <REACH RANK="5952"/>

        <RANK DELTA="-1648"/>

    </SD>

</ALEXA>

3. JSON结果：

{

  "@attributes": {

    AID: "=",

    HOME:  0,

    URL: "davidwalsh.name/",

    VER: "0.9",

  },

  SD = [

    {

      "@attributes": {

        FLAGS: "",

        HOST: "davidwalsh.name",

        TITLE: A

      },

      LINKSIN: {

        "@attributes": {

          NUM: 1102

        }

      },

      SPEED: {

        "@attributes": {

          PCT: 51,

          TEXT: 1421

        }

      },

      TITLE: {

        "@attributes": {

          TEXT: "David Walsh Blog :: PHP, MySQL, CSS, Javascript, MooTools, and Everything Else",

        }

      },

    },

    {

      POPULARITY: {

        "@attributes": {

          TEXT: 7131,

          URL: "davidwalsh.name/"

        }

      },

      RANK: {

        "@attributes": {

          DELTA: "-1648"

        }

      },

      REACH: {

        "@attributes": {

          RANK = 5952

        }

      }

    }

  ]

}

关于js操作xml感兴趣的朋友还可参考在线工具：

在线XML/JSON互相转换工具

在线XML格式化/压缩工具

希望本文所述对大家的javascript程序设计有所帮助。