本文实例讲述了javascript格式化json显示方法。分享给大家供大家参考。具体分析如下：
将json对象或者json字符串格式化方便在网页上限制
var formatJson = function(json, options) {
var reg = null,
formatted = '',
pad = 0,
PADDING = '';
//one can also use 't' or a different number of spaces
// optional settings
options = options || {};
// remove newline where '{' or '[' follows ':'
options.newlineAfterColonIfBeforeBraceOrBracket = (options.newlineAfterColonIfBeforeBraceOrBracket === true) ? true : false;
// use a space after a colon
options.spaceAfterColon = (options.spaceAfterColon === false) ? false : true;
// begin formatting...
if (typeof json !== 'string') {
// make sure we start with the JSON as a string
json = JSON.stringify(json);
} else {
// is already a string, so parse and re-stringify
//in order to remove extra whitespace
json = JSON.parse(json);
json = JSON.stringify(json);
}
// add newline before and after curly braces
reg = /([{}])/g;
json = json.replace(reg, 'rn$1rn');
// add newline before and after square brackets
reg = /([[]])/g;
json = json.replace(reg, 'rn$1rn');
// add newline after comma
reg = /(,)/g;
json = json.replace(reg, '$1rn');
// remove multiple newlines
reg = /(rnrn)/g;
json = json.replace(reg, 'rn');
// remove newlines before commas
reg = /rn,/g;
json = json.replace(reg, ',');
// optional formatting...
if (!options.newlineAfterColonIfBeforeBraceOrBracket) {
reg = /:rn{/g;
json = json.replace(reg, ':{');
reg = /:rn[/g;
json = json.replace(reg, ':[');
}
if (options.spaceAfterColon) {
reg = /:/g;
json = json.replace(reg, ': ');
}
$.each(json.split('rn'), function(index, node) {
var i = 0,
indent = 0,
padding = '';
if (node.match(/{$/) || node.match(/[$/)) {
indent = 1;
} else if (node.match(/}/) || node.match(/]/)) {
if (pad !== 0) {
pad -= 1;
}
} else {
indent = 0;
}
for (i = 0; i < pad; i++) {
padding += PADDING;
}
formatted += padding + node + 'rn';
pad += indent;
});
return formatted;
};
希望本文所述对大家的javascript程序设计有所帮助。
