其实json格式化没想象中的那么复杂，难点就是json格式化的工作流程。
正好工作上需要，于是就搞了一套json格式化+json着色的方法，原生的方法，可以直接使用。json数据格式化前后对比图，如下：
下面是源码，可以根据个人需求适当修改：
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>js格式化json+json着色的方法</title> 6 <script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script> 7 <style> 8 body {font-size:14px;font-family:consolas;} 9 pre {font-family:'consolas';} 10 .Canvas { 11 font:14px/18px 'consolas'; 12 background-color: #ECECEC; 13 color: #000000; 14 border: solid 1px #CECECE; 15 } 16 .ObjectBrace { 17 color: #00AA00; 18 font-weight: bold; 19 } 20 .ArrayBrace { 21 color: #0033FF; 22 font-weight: bold; 23 } 24 .PropertyName { 25 color: #CC0000; 26 font-weight: bold; 27 } 28 .String { 29 color: #007777; 30 } 31 .Number { 32 color: #AA00AA; 33 } 34 .Boolean { 35 color: #0000FF; 36 } 37 .Function { 38 color: #AA6633; 39 text-decoration: italic; 40 } 41 .Null { 42 color: #0000FF; 43 } 44 .Comma { 45 color: #000000; 46 font-weight: bold; 47 } 48 PRE.CodeContainer { 49 margin-top: 0px; 50 margin-bottom: 0px; 51 } 52 </style> 53 54 </head> 55 <body> 56 <!--格式化后的json写入的位置--> 57 <div id="writePlace"></div><br> 58 <button onclick="Process)">着色</button> 59 <div id="Canvas"></div> 60 <script> 61 //格式化代码函数,已经用原生方式写好了不需要改动,直接引用就好 62 var formatJson = function json, options) { 63 var reg = null, 64 formatted = '', 65 pad = 0, 66 PADDING = ' '; 67 options = options || {}; 68 options.newlineAfterColonIfBeforeBraceOrBracket = options.newlineAfterColonIfBeforeBraceOrBracket === true) ? true : false; 69 options.spaceAfterColon = options.spaceAfterColon === false) ? false : true; 70 if typeof json !== 'string') { 71 json = JSON.stringifyjson); 72 } else { 73 json = JSON.parsejson); 74 json = JSON.stringifyjson); 75 } 76 reg = /[{}])/g; 77 json = json.replacereg, ' $1 '); 78 reg = /[[]])/g; 79 json = json.replacereg, ' $1 '); 80 reg = /\,)/g; 81 json = json.replacereg, '$1 '); 82 reg = / )/g; 83 json = json.replacereg, ' '); 84 reg = / \,/g; 85 json = json.replacereg, ','); 86 if !options.newlineAfterColonIfBeforeBraceOrBracket) { 87 reg = /: {/g; 88 json = json.replacereg, ':{'); 89 reg = /: [/g; 90 json = json.replacereg, ':['); 91 } 92 if options.spaceAfterColon) { 93 reg = /:/g; 94 json = json.replacereg, ':'); 95 } 96 json.split' ')).forEachfunction node, index) { 97 //console.lognode); 98 var i = 0, 99 indent = 0, 100 padding = ''; 101 102 if node.match/{$/) || node.match/[$/)) { 103 indent = 1; 104 } else if node.match/}/) || node.match/]/)) { 105 if pad !== 0) { 106 pad -= 1; 107 } 108 } else { 109 indent = 0; 110 } 111 112 for i = 0; i < pad; i++) { 113 padding += PADDING; 114 } 115 116 formatted += padding + node + ' '; 117 pad += indent; 118 }); 119 return formatted; 120 }; 121 //引用示例部分 122 //1)创建json格式或者从后台拿到对应的json格式 123 //var originalJson = {"name": "binginsist", "sex": "男", "age": "25"}; 124 //下面用一个真实的json数据做测试 125 var originalJson = { 126 "_errmsg":"ok", 127 "result":[ 128 ], 129 "stat":"wechat", 130 "_token":"", 131 "weixinId":"900504", 132 "_errcode":"0", 133 "regionId":"00000000" 134 } 135 136 //2)调用formatJson函数,将json格式进行格式化 137 var resultJson = formatJsonoriginalJson); 138 //3)将格式化好后的json写入页面中 139 document.getElementById"writePlace").innerHTML = '<pre>' +resultJson + '<pre/>'; 140 141 142 //着色 143 window.TAB = " "; 144 function IsArrayobj) { 145 return obj && 146 typeof obj === 'object' && typeof obj.length === 'number' && !obj.propertyIsEnumerable'length')); 147 } 148 function Process) { 149 var json = $'#writePlace').text); 150 console.logjson); 151 document.getElementById"Canvas").style.display = "block"; 152 var html = ""; 153 try { 154 if json == "") { 155 json = '""'; 156 } 157 var obj = eval"[" + json + "]"); 158 html = ProcessObjectobj[0], 0, false, false, false); 159 document.getElementById"Canvas").innerHTML = "<PRE class='CodeContainer'>" + html + "</PRE>"; 160 } catche) { 161 alert"json语法错误，不能格式化。错误信息: " + e.message); 162 document.getElementById"Canvas").innerHTML = ""; 163 } 164 } 165 function ProcessObjectobj, indent, addComma, isArray, isPropertyContent) { 166 var html = ""; 167 var comma = addComma) ? "<span class='Comma'>,</span> ": ""; 168 var type = typeof obj; 169 if IsArrayobj)) { 170 if obj.length == 0) { 171 html += GetRowindent, "<span class='ArrayBrace'>[ ]</span>" + comma, isPropertyContent); 172 } else { 173 html += GetRowindent, "<span class='ArrayBrace'>[</span>", isPropertyContent); 174 for var i = 0; i < obj.length; i++) { 175 html += ProcessObjectobj[i], indent + 1, i < obj.length - 1), true, false); 176 } 177 html += GetRowindent, "<span class='ArrayBrace'>]</span>" + comma); 178 } 179 } else { 180 if type == "object" && obj == null) { 181 html += FormatLiteral"null", "", comma, indent, isArray, "Null"); 182 } else { 183 if type == "object") { 184 var numProps = 0; 185 for var prop in obj) { 186 numProps++; 187 } 188 if numProps == 0) { 189 html += GetRowindent, "<span class='ObjectBrace'>{ }</span>" + comma, isPropertyContent) 190 } else { 191 html += GetRowindent, "<span class='ObjectBrace'>{</span>", isPropertyContent); 192 var j = 0; 193 for var prop in obj) { 194 html += GetRowindent + 1, '<span class="PropertyName">"' + prop + '"</span>: ' + ProcessObjectobj[prop], indent + 1, ++j < numProps, false, true)) 195 } 196 html += GetRowindent, "<span class='ObjectBrace'>}</span>" + comma); 197 } 198 } else { 199 if type == "number") { 200 html += FormatLiteralobj, "", comma, indent, isArray, "Number"); 201 } else { 202 if type == "boolean") { 203 html += FormatLiteralobj, "", comma, indent, isArray, "Boolean"); 204 } else { 205 if type == "function") { 206 obj = FormatFunctionindent, obj); 207 html += FormatLiteralobj, "", comma, indent, isArray, "Function"); 208 } else { 209 if type == "undefined") { 210 html += FormatLiteral"undefined", "", comma, indent, isArray, "Null"); 211 } else { 212 html += FormatLiteralobj, '"', comma, indent, isArray, "String"); 213 } 214 } 215 } 216 } 217 } 218 } 219 } 220 return html; 221 }; 222 223 function FormatLiteralliteral, quote, comma, indent, isArray, style) { 224 if typeof literal == "string") { 225 literal = literal.split"<").join"<").split">").join">"); 226 } 227 var str = "<span class='" + style + "'>" + quote + literal + quote + comma + "</span>"; 228 if isArray) { 229 str = GetRowindent, str); 230 } 231 return str; 232 } 233 function FormatFunctionindent, obj) { 234 var tabs = ""; 235 for var i = 0; i < indent; i++) { 236 tabs += window.TAB; 237 } 238 var funcStrArray = obj.toString).split" "); 239 var str = ""; 240 for var i = 0; i < funcStrArray.length; i++) { 241 str += i == 0) ? "": tabs) + funcStrArray[i] + " "; 242 } 243 return str; 244 } 245 function GetRowindent, data, isPropertyContent) { 246 var tabs = ""; 247 for var i = 0; i < indent && !isPropertyContent; i++) { 248 tabs += window.TAB; 249 } 250 if data != null && data.length > 0 && data.charAtdata.length - 1) != " ") { 251 data = data + " "; 252 } 253 return tabs + data; 254 }; 255 </script> 256 </body> 257 </html>