正则表达式
/*** 正则表达式数组*/
//2017-09-12T00:00:00,//2017-01-05T00:00:00+08:00, //2016-01-21T04:13:56.293Z//2017-09-12T00:00:00,
String[] regexArray = {"^\\d{4}-\\d{1,2}-\\d{1,2}T(([0-1]{1}[0-9]{1})|([2]{1}[0-4]{1}))([:])(([0-5]{1}[0-9]{1}|[6]{1}[0]{1}))([:])((([0-5]{1}[0-9]{1}|[6]{1}[0]{1})))",//2018年07月25日"^\\d{4}[\u5e74]\\d{1,2}[\u6708]\\d{1,2}[\u65e5]$",//2015/1/14 00:00:00"^\\d{4}\\/\\d{1,2}\\/\\d{1,2}\\s*(([0-1]{1}[0-9]{1})|([2]{1}[0-4]{1}))([:])(([0-5]{1}[0-9]{1}|[6]{1}[0]{1}))([:])((([0-5]{1}[0-9]{1}|[6]{1}[0]{1})))"};
代码书写：
public String doFormat(String value, String to) {try {for (String regex : regexArray) {if (value.contains("T")){try {Date parse = DateFormatUtils.ISO_DATETIME_FORMAT.parse(value);String format = DateFormatUtils.format(parse, "yyyy-MM-dd HH:mm:ss");return format;} catch (ParseException e) {e.printStackTrace();}}if (value.matches(regex)) {if(value.contains("年")&&value.contains("月")&&value.contains("日")){SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");Date parse = sdf.parse(value);//转换为util.dateString formated = DateFormatUtils.format(parse, to);return formated;}if (value.contains("/")) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");Date parse = sdf.parse(value);//转换为util.dateString format = DateFormatUtils.format(parse, "yyyy-MM-dd HH:mm:ss");return format;}SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");Date parse = sdf.parse(value);//转换为util.dateString formated = DateFormatUtils.format(parse, to);return formated;}}} catch (ParseException e) {log.warn("格式化失败:{}", e);return value;}log.warn("没有匹配的表达式");return value;
}