摘要：
在线验证json格式，格式化json代码，对json代码排版处理，支付json数据层级，展开和叠起，json缩进控制。代码来源网络整理。在线预览地址：https://... 在线验证json格式，格式化json代码，对json代码排版处理，支付json数据层级，展开和叠起，json缩进控制。代码来源网络整理。
在线预览地址：https://zixuephp.net/tool-json.html
代码：
js<!DOCTYPE html><html><head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>在线代码格式化</title> <script type="text/javascript"> window.SINGLE_TAB = " ";window.ImgCollapsed = "https://zixuephp.net/static/images/Collapsed.gif";window.ImgExpanded = "https://zixuephp.net/static/images/Expanded.gif";window.QuoteKeys = true; function $id(id) { return document.getElementById(id);} function IsArray(obj) { return obj && typeof obj === 'object' && typeof obj.length === 'number' && !(obj.propertyIsEnumerable('length'));} function Process() { SetTab(); window.IsCollapsible = $id("CollapsibleView").checked; var json = $id("RawJson").value; var html = ""; try { if (json == "") { json = "\"\""; return; } var obj = eval("[" + json + "]"); html = ProcessObject(obj[0], 0, false, false, false); $id("Canvas").innerHTML = "<PRE class='CodeContainer'>" + html + "</PRE>"; } catch (e) { alert("JSON数据格式不正确:\n" + e.message); $id("Canvas").innerHTML = ""; }} window._dateObj = new Date();window._regexpObj = new RegExp(); function ProcessObject(obj, indent, addComma, isArray, isPropertyContent) { var html = ""; var comma = (addComma) ? "<span class='Comma'>,</span> " : ""; var type = typeof obj; var clpsHtml = ""; if (IsArray(obj)) { if (obj.length == 0) { html += GetRow(indent, "<span class='ArrayBrace'>[ ]</span>" + comma, isPropertyContent); } else { clpsHtml = window.IsCollapsible ? "<span><img src=\"" + window.ImgExpanded + "\" onClick=\"ExpImgClicked(this)\" /></span><span class='collapsible'>" : ""; html += GetRow(indent, "<span class='ArrayBrace'>[</span>" + clpsHtml, isPropertyContent); for (var i = 0; i < obj.length; i++) { html += ProcessObject(obj[i], indent + 1, i < (obj.length - 1), true, false); } clpsHtml = window.IsCollapsible ? "</span>" : ""; html += GetRow(indent, clpsHtml + "<span class='ArrayBrace'>]</span>" + comma); } } else if (type == 'object') { if (obj == null) { html += FormatLiteral("null", "", comma, indent, isArray, "Null"); } else if (obj.constructor == window._dateObj.constructor) { html += FormatLiteral("new Date(" + obj.getTime() + ") /*" + obj.toLocaleString() + "*/", "", comma, indent, isArray, "Date"); } else if (obj.constructor == window._regexpObj.constructor) { html += FormatLiteral("new RegExp(" + obj + ")", "", comma, indent, isArray, "RegExp"); } else { var numProps = 0; for (var prop in obj) numProps++; if (numProps == 0) { html += GetRow(indent, "<span class='ObjectBrace'>{ }</span>" + comma, isPropertyContent); } else { clpsHtml = window.IsCollapsible ? "<span><img src=\"" + window.ImgExpanded + "\" onClick=\"ExpImgClicked(this)\" /></span><span class='collapsible'>" : ""; html += GetRow(indent, "<span class='ObjectBrace'>{</span>" + clpsHtml, isPropertyContent); var j = 0; for (var prop in obj) { var quote = window.QuoteKeys ? "\"" : ""; html += GetRow(indent + 1, "<span class='PropertyName'>" + quote + prop + quote + "</span>: " + ProcessObject(obj[prop], indent + 1, ++j < numProps, false, true)); } clpsHtml = window.IsCollapsible ? "</span>" : ""; html += GetRow(indent, clpsHtml + "<span class='ObjectBrace'>}</span>" + comma); } } } else if (type == 'number') { html += FormatLiteral(obj, "", comma, indent, isArray, "Number"); } else if (type == 'boolean') { html += FormatLiteral(obj, "", comma, indent, isArray, "Boolean"); } else if (type == 'function') { if (obj.constructor == window._regexpObj.constructor) { html += FormatLiteral("new RegExp(" + obj + ")", "", comma, indent, isArray, "RegExp"); } else { obj = FormatFunction(indent, obj); html += FormatLiteral(obj, "", comma, indent, isArray, "Function"); } } else if (type == 'undefined') { html += FormatLiteral("undefined", "", comma, indent, isArray, "Null"); } else { html += FormatLiteral(obj.toString().split("\\").join("\\\\").split('"').join('\\"'), "\"", comma, indent, isArray, "String"); } return html; } function FormatLiteral(literal, quote, comma, indent, isArray, style) { if (typeof literal == 'string') literal = literal.split("<").join("<").split(">").join(">"); var str = "<span class='" + style + "'>" + quote + literal + quote + comma + "</span>"; if (isArray) str = GetRow(indent, str); return str; } function FormatFunction(indent, obj) { var tabs = ""; for (var i = 0; i < indent; i++) tabs += window.TAB; var funcStrArray = obj.toString().split("\n"); var str = ""; for (var i = 0; i < funcStrArray.length; i++) { str += ((i == 0) ? "" : tabs) + funcStrArray[i] + "\n"; } return str; } function GetRow(indent, data, isPropertyContent) { var tabs = ""; for (var i = 0; i < indent && !isPropertyContent; i++) tabs += window.TAB; if (data != null && data.length > 0 && data.charAt(data.length - 1) != "\n") data = data + "\n"; return tabs + data; } function CollapsibleViewClicked() { $id("CollapsibleViewDetail").style.visibility = $id("CollapsibleView").checked ? "visible" : "hidden"; Process(); } function QuoteKeysClicked() { window.QuoteKeys = $id("QuoteKeys").checked; Process(); } function CollapseAllClicked() { EnsureIsPopulated(); TraverseChildren($id("Canvas"), function (element) { if (element.className == 'collapsible') { MakeContentVisible(element, false); } }, 0); } function ExpandAllClicked() { EnsureIsPopulated(); TraverseChildren($id("Canvas"), function (element) { if (element.className == 'collapsible') { MakeContentVisible(element, true); } }, 0); } function MakeContentVisible(element, visible) { var img = element.previousSibling.firstChild; if (!!img.tagName && img.tagName.toLowerCase() == "img") { element.style.display = visible ? 'inline' : 'none'; element.previousSibling.firstChild.src = visible ? window.ImgExpanded : window.ImgCollapsed; } } function TraverseChildren(element, func, depth) { for (var i = 0; i < element.childNodes.length; i++) { TraverseChildren(element.childNodes[i], func, depth + 1); } func(element, depth); } function ExpImgClicked(img) { var container = img.parentNode.nextSibling; if (!container) return; var disp = "none"; var src = window.ImgCollapsed; if (container.style.display == "none") { disp = "inline"; src = window.ImgExpanded; } container.style.display = disp; img.src = src; } function CollapseLevel(level) { EnsureIsPopulated(); TraverseChildren($id("Canvas"), function (element, depth) { if (element.className == 'collapsible') { if (depth >= level) { MakeContentVisible(element, false); } else { MakeContentVisible(element, true); } } }, 0); } function TabSizeChanged() { Process(); } function SetTab() { var select = $id("TabSize"); window.TAB = MultiplyString(parseInt(select.options[select.selectedIndex].value), window.SINGLE_TAB); } function EnsureIsPopulated() { if (!$id("Canvas").innerHTML && !!$id("RawJson").value) Process(); } function MultiplyString(num, str) { var sb = []; for (var i = 0; i < num; i++) { sb.push(str); } return sb.join(""); } function SelectAllClicked() { if (!!document.selection && !!document.selection.empty) { document.selection.empty(); } else if (window.getSelection) { var sel = window.getSelection(); if (sel.removeAllRanges) { window.getSelection().removeAllRanges(); } } var range = (!!document.body && !!document.body.createTextRange) ? document.body.createTextRange() : document.createRange(); if (!!range.selectNode) range.selectNode($id("Canvas")); else if (range.moveToElementText) range.moveToElementText($id("Canvas")); if (!!range.select) range.select($id("Canvas")); else window.getSelection().addRange(range); } function LinkToJson() { var val = $id("RawJson").value; val = escape(val.split('/n').join(' ').split('/r').join(' ')); $id("InvisibleLinkUrl").value = val; $id("InvisibleLink").submit(); } </script></head><body> <div class="topBar"> <div class="title">待格式化JSON：</div> <textarea id="RawJson" style="width:100%;" >{"name":"php自学网","site":"https://zixuephp.net"}</textarea></div> <div class="operateTB form-inline"> <label for="TabSize">缩进量：</label> <select id="TabSize" onchange="TabSizeChanged()" class="span1"> <option value="1">1</option> <option value="2" selected="true">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> </select> <label for="QuoteKeys"> <input type="checkbox" id="QuoteKeys" onclick="QuoteKeysClicked()" checked="true">引号 </label> <span id="CollapsibleViewHolder"> <label for="CollapsibleView"> <input type="checkbox" id="CollapsibleView" onclick="CollapsibleViewClicked()" checked="true">显示控制 </label> </span> <span id="CollapsibleViewDetail" style="visibility: visible;margin-right:10px; "> <a href="javascript:void(0);" onclick="ExpandAllClicked()">展开</a> <a href="javascript:void(0);" onclick="CollapseAllClicked()">叠起</a> <a href="javascript:void(0);" onclick="CollapseLevel(3)">2级</a> <a href="javascript:void(0);" onclick="CollapseLevel(4)">3级</a> <a href="javascript:void(0);" onclick="CollapseLevel(5)">4级</a> <a href="javascript:void(0);" onclick="CollapseLevel(6)">5级</a> <a href="javascript:void(0);" onclick="CollapseLevel(7)">6级</a> <a href="javascript:void(0);" onclick="CollapseLevel(8)">7级</a> <a href="javascript:void(0);" onclick="CollapseLevel(9)">8级</a> </span> <input type="button" onclick="Process()" value="格式化"></div><div class="bottomBar"> <div class="title">格式化JSON：</div> <div id="Canvas"></div></div> </body></html>
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