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@weishai
Last active December 17, 2015 22:59
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简单的js代码可以实现格式化json,使用方法很简单: 网页换行和制表符不一样,设置一下 JsonUti.n = "<br />"; JsonUti.t = "&nbsp;&nbsp;&nbsp;"; document.getElementById("afterformat").innerHTML = JsonUti.convertToString(json); 需要注意,此处的json是JSON类型,如果是string的话需要先把string转成JSON格式。
var JsonUti = {
//定义换行符
n: "\n",
//定义制表符
t: "\t",
//转换String
convertToString: function(obj) {
return JsonUti.__writeObj(obj, 1);
},
//写对象
__writeObj: function(obj //对象
, level //层次(基数为1)
, isInArray) { //此对象是否在一个集合内
//如果为空,直接输出null
if (obj == null) {
return "null";
}
//为普通类型,直接输出值
if (obj.constructor == Number || obj.constructor == Date || obj.constructor == String || obj.constructor == Boolean) {
var v = obj.toString();
var tab = isInArray ? JsonUti.__repeatStr(JsonUti.t, level - 1) : "";
if (obj.constructor == String || obj.constructor == Date) {
//时间格式化只是单纯输出字符串,而不是Date对象
return tab + ("\"" + v + "\"");
}
else if (obj.constructor == Boolean) {
return tab + v.toLowerCase();
}
else {
return tab + (v);
}
}
//写Json对象,缓存字符串
var currentObjStrings = [];
//遍历属性
for (var name in obj) {
var temp = [];
//格式化Tab
var paddingTab = JsonUti.__repeatStr(JsonUti.t, level);
temp.push(paddingTab);
//写出属性名
temp.push(name + " : ");
var val = obj[name];
if (val == null) {
temp.push("null");
}
else {
var c = val.constructor;
if (c == Array) { //如果为集合,循环内部对象
temp.push(JsonUti.n + paddingTab + "[" + JsonUti.n);
var levelUp = level + 2; //层级+2
var tempArrValue = []; //集合元素相关字符串缓存片段
for (var i = 0; i < val.length; i++) {
//递归写对象
tempArrValue.push(JsonUti.__writeObj(val[i], levelUp, true));
}
temp.push(tempArrValue.join("," + JsonUti.n));
temp.push(JsonUti.n + paddingTab + "]");
}
else if (c == Function) {
temp.push("[Function]");
}
else {
//递归写对象
temp.push(JsonUti.__writeObj(val, level + 1));
}
}
//加入当前对象“属性”字符串
currentObjStrings.push(temp.join(""));
}
return (level > 1 && !isInArray ? JsonUti.n : "") //如果Json对象是内部,就要换行格式化
+ JsonUti.__repeatStr(JsonUti.t, level - 1) + "{" + JsonUti.n //加层次Tab格式化
+ currentObjStrings.join("," + JsonUti.n) //串联所有属性值
+ JsonUti.n + JsonUti.__repeatStr(JsonUti.t, level - 1) + "}"; //封闭对象
},
__isArray: function(obj) {
if (obj) {
return obj.constructor == Array;
}
return false;
},
__repeatStr: function(str, times) {
var newStr = [];
if (times > 0) {
for (var i = 0; i < times; i++) {
newStr.push(str);
}
}
return newStr.join("");
}
}
//example
var jsonText = JsonUti.convertToString(jsonData); //jsonData必须为json对象
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