LEN

收藏 JS JSON源码格式化与压缩转换方法
/* 格式化JSON源码(对象转换为JSON文本) */ json_format(json) json_form...
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2017/09

收藏 JS JSON源码格式化与压缩转换方法

/* 格式化JSON源码(对象转换为JSON文本) */
json_format(json)

json_format(json,true) /*是否为压缩模式*/
function json_format(txt, compress) {
    var indentChar = '    ';
    if (/^\s*$/.test(txt)) {
        console.log('数据为空,无法格式化! ');
        return;
    }
    try {
        var data = eval('(' + txt + ')');
    } catch (e) {
        console.log('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);
    return draw.join('');
}

Plan B

    

function format(txt, compress) {
    var indentChar = '    ';
    if (/^\s*$/.test(txt)) {
        console.log('数据为空,无法格式化! ');
        return;
    }
    try {
        var data = eval('(' + txt + ')');
    }
    catch (e) {
        console.log('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);
    return draw.join('');
}
Last modification:November 8th, 2017 at 07:34 pm
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