html代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/json_format.js" ></script>
<script type="text/javascript" src="js/jsonFormater.js" ></script>
<style>
.jf-PropertyName{
color: #CC0000;
}
.jf-String{
color: #007777;
}
#josn_div{
font-family: Lucida Console,Georgia;
color: #000000;
border: solid 1px #CECECE;
width: 90%;
background-color: #FFFFDD;
}
</style>
<script type="text/javascript"> var jf = null; //创建对象
$(function(){
var options = {
dom : '#test_light', //对应容器的css选择器
baseDom : "json_text"
};
jf = new JsonFormater(options); //创建对象
}); function testJson(){
jf.baseFomat($("#json_input").val());
} function testHighLight(){
jf.doFormat($("#json_input").val()); //格式化json
} </script>
</head>
<body>
<input type="text" id="json_input" placeholder="请输入json"/>
<input type="button" value="数据转换" onclick="testJson()"/>
<input type="button" value="高亮" onclick="testHighLight()"/>
<br>
<textarea id="json_text" cols="50" rows="20" style="background-color: #263238; font-weight:bold ; color: #A5E88D; font-family: "Source Sans Pro", 'Microsoft Yahei', '微软雅黑', sans-serif, Helvetica, 'Hiragino Sans GB', Arial;">
</textarea> <div id="josn_div">
<pre id="test_light"> </pre>
</div>
</body>
</html>
JS脚本：
function JsonFormater(opt) {
this.options = $.extend({
dom: '',//带有高亮、关键字颜色设置
baseDom:'', //基本格式节点
tabSize: 2,
singleTab: " ",
quoteKeys: true,
imgCollapsed: "img/Collapsed.gif",
imgExpanded: "img/Expanded.gif",
isCollapsible: true
}, opt || {});
this.isFormated = false;
this.obj = {
_dateObj: new Date(),
_regexpObj: new RegExp()
};
this.init();
}
JsonFormater.prototype = {
init: function () {
this.tab = this.multiplyString(this.options.tabSize, this.options.singleTab);
this.bindEvent();
},
// 基本格式转换-只读模式
baseFomat: function(txt,compress/*是否为压缩模式*/){/* 格式化JSON源码(对象转换为JSON文本) */
var indentChar = ' ';
if(/^\s*$/.test(txt)){
alert('数据为空,无法格式化! ');
return;
}
try{var data=eval('('+txt+')');}
catch(e){
alert('数据源语法错误,格式化失败! 错误信息: '+e.description,'err');
return;
};
var draw=[],last=false,This=this,line=compress?'':'\n',nodeCount=0,maxDepth=0;
var notify=function(name,value,isLast,indent/*缩进*/,formObj){
nodeCount++;/*节点计数*/
for (var i=0,tab='';i<indent;i++ )tab+=indentChar;/* 缩进HTML */
tab=compress?'':tab;/*压缩模式忽略缩进*/
maxDepth=++indent;/*缩进递增并记录*/
if(value&&value.constructor==Array){/*处理数组*/
draw.push(tab+(formObj?('"'+name+'":'):'')+'['+line);/*缩进'[' 然后换行*/
for (var i=0;i<value.length;i++)
notify(i,value[i],i==value.length-1,indent,false);
draw.push(tab+']'+(isLast?line:(','+line)));/*缩进']'换行,若非尾元素则添加逗号*/
}else if(value&&typeof value=='object'){/*处理对象*/
draw.push(tab+(formObj?('"'+name+'":'):'')+'{'+line);/*缩进'{' 然后换行*/
var len=0,i=0;
for(var key in value)len++;
for(var key in value)notify(key,value[key],++i==len,indent,true);
draw.push(tab+'}'+(isLast?line:(','+line)));/*缩进'}'换行,若非尾元素则添加逗号*/
}else{
if(typeof value=='string')value='"'+value+'"';
draw.push(tab+(formObj?('"'+name+'":'):'')+value+(isLast?'':',')+line);
};
};
var isLast=true,indent=0;
notify('',data,isLast,indent,false);
if(this.options.baseDom){
$("#"+this.options.baseDom).html(draw.join(''));
}else{
return draw.join('');
}
},
// 带有颜色、高亮功能额格式化方法
doFormat: function (json) {
var html;
var obj;
try {
if(typeof json == 'object'){
obj = [json];
}else{
if (json == ""){
json = "\"\"";
}
obj = eval("[" + json + "]");
}
html = this.ProcessObject(obj[0], 0, false, false, false);
$(this.options.dom).html("<pre class='jf-CodeContainer'>" + html + "</pre>");
this.isFormated = true;
} catch (e) {
alert("JSON数据格式不正确:\n" + e.message);
$(this.options.dom).html("");
this.isFormated = false;
}
},
bindEvent: function () {
var that = this;
$(this.options.dom).off('click','.imgToggle');
$(this.options.dom).on('click', '.imgToggle', function () {
if (that.isFormated == false) {
return;
}
that.makeContentVisible($(this).parent().next(), !$(this).data('status'));
});
},
expandAll: function () {
if (this.isFormated == false) {
return;
}
var that = this;
this.traverseChildren($(this.options.dom), function(element){
if(element.hasClass('jf-collapsible')){
that.makeContentVisible(element, true);
}
}, 0);
},
collapseAll: function () {
if (this.isFormated == false) {
return;
}
var that = this;
this.traverseChildren($(this.options.dom), function(element){
if(element.hasClass('jf-collapsible')){
that.makeContentVisible(element, false);
}
}, 0);
},
collapseLevel: function(level){
if (this.isFormated == false) {
return;
}
var that = this;
this.traverseChildren($(this.options.dom), function(element, depth){
if(element.hasClass('jf-collapsible')){
if(depth >= level){
that.makeContentVisible(element, false);
}else{
that.makeContentVisible(element, true);
}
}
}, 0);
},
isArray: function (obj) {
return obj &&
typeof obj === 'object' &&
typeof obj.length === 'number' && !(obj.propertyIsEnumerable('length'));
},
getRow: function (indent, data, isPropertyContent) {
var tabs = "";
if (!isPropertyContent) {
tabs = this.multiplyString(indent, this.tab);
}
if (data != null && data.length > 0 && data.charAt(data.length - 1) != "\n") {
data = data + "\n";
}
return tabs + data;
},
formatLiteral: function (literal, quote, comma, indent, isArray, style) {
if (typeof literal == 'string') {
literal = literal.split("<").join("<").split(">").join(">");
}
var str = "<span class='jf-" + style + "'>" + quote + literal + quote + comma + "</span>";
if (isArray) str = this.getRow(indent, str);
return str;
},
formatFunction: function (indent, obj) {
var tabs;
var i;
var funcStrArray = obj.toString().split("\n");
var str = "";
tabs = this.multiplyString(indent, this.tab);
for (i = 0; i < funcStrArray.length; i++) {
str += ((i == 0) ? "" : tabs) + funcStrArray[i] + "\n";
}
return str;
},
multiplyString: function (num, str) {
var result = '';
for (var i = 0; i < num; i++) {
result += str;
}
return result;
},
traverseChildren: function (element, func, depth) {
var length = element.children().length;
for (var i = 0; i < length; i++) {
this.traverseChildren(element.children().eq(i), func, depth + 1);
}
func(element, depth);
},
makeContentVisible : function(element, visible){
var img = element.prev().find('img');
if(visible){
element.show();
img.attr('src', this.options.imgExpanded);
img.data('status', 1);
}else{
element.hide();
img.attr('src', this.options.imgCollapsed);
img.data('status', 0);
}
},
ProcessObject: function (obj, indent, addComma, isArray, isPropertyContent) {
var html = "";
var comma = (addComma) ? "<span class='jf-Comma'>,</span> " : "";
var type = typeof obj;
var clpsHtml = "";
var prop;
if (this.isArray(obj)) {
if (obj.length == 0) {
html += this.getRow(indent, "<span class='jf-ArrayBrace'>[ ]</span>" + comma, isPropertyContent);
} else {
clpsHtml = this.options.isCollapsible ? "<span><img class='imgToggle' data-status='1' src='" + this.options.imgExpanded + "'/></span><span class='jf-collapsible'>" : "";
html += this.getRow(indent, "<span class='jf-ArrayBrace'>[</span>" + clpsHtml, isPropertyContent);
for (var i = 0; i < obj.length; i++) {
html += this.ProcessObject(obj[i], indent + 1, i < (obj.length - 1), true, false);
}
clpsHtml = this.options.isCollapsible ? "</span>" : "";
html += this.getRow(indent, clpsHtml + "<span class='jf-ArrayBrace'>]</span>" + comma);
}
} else if (type == 'object') {
if (obj == null) {
html += this.formatLiteral("null", "", comma, indent, isArray, "Null");
} else {
var numProps = 0;
for (prop in obj) numProps++;
if (numProps == 0) {
html += this.getRow(indent, "<span class='jf-ObjectBrace'>{ }</span>" + comma, isPropertyContent);
} else {
clpsHtml = this.options.isCollapsible ? "<span><img class='imgToggle' data-status='1' src='" + this.options.imgExpanded + "'/></span><span class='jf-collapsible'>" : "";
html += this.getRow(indent, "<span class='jf-ObjectBrace'>{</span>" + clpsHtml, isPropertyContent);
var j = 0;
for (prop in obj) {
var quote = this.options.quoteKeys ? "\"" : "";
html += this.getRow(indent + 1, "<span class='jf-PropertyName'>" + quote + prop + quote + "</span>: " + this.ProcessObject(obj[prop], indent + 1, ++j < numProps, false, true));
}
clpsHtml = this.options.isCollapsible ? "</span>" : "";
html += this.getRow(indent, clpsHtml + "<span class='jf-ObjectBrace'>}</span>" + comma);
}
}
} else if (type == 'number') {
html += this.formatLiteral(obj, "", comma, indent, isArray, "Number");
} else if (type == 'boolean') {
html += this.formatLiteral(obj, "", comma, indent, isArray, "Boolean");
}else if (type == 'undefined') {
html += this.formatLiteral("undefined", "", comma, indent, isArray, "Null");
} else {
html += this.formatLiteral(obj.toString().split("\\").join("\\\\").split('"').join('\\"'), "\"", comma, indent, isArray, "String");
}
return html;
}
};