万能的JAVA任何格式日期转换工具类

客官°小女子只卖身不卖艺 2022-05-09 00:52 217阅读 0赞

过程中，被dash.length()坑了一把。

废话少说，上coding.

public static Date convertStrToDate(String s) throws Exception {

String dash = "-";
    String slash = "/";
    String str = s.replace("*", "");
    int firstDash = str.indexOf(dash);
    int lastDash = str.lastIndexOf(dash);
    int firstSlash = str.indexOf(slash);
    int lastSlash = str.lastIndexOf(slash);
    int dashLength = str.length() - str.replace(dash, "").length();
    int slashLength = str.length() - str.replace(slash, "").length();
    String year, month, day, strDate;
    if (s.contains(dash) && s.contains(slash)) {
        throw new Exception("日期格式不合法：" + s);
    }
    LogKit.info("dash个数" + dashLength);
    Date date = null;
    if (str.contains(dash)) {
        year = str.substring(0, firstDash).trim();
        month = dashLength == 1 ? str.substring(firstDash, str.length()).substring(dash.length()) : str.substring(firstDash, lastDash).substring(dash.length());
        day = dashLength == 1 ? "1" : str.substring(lastDash, str.length()).substring(dash.length());
        if (Integer.valueOf(month) > 12 || Integer.valueOf(day) > 31 || Integer.valueOf(year) < 2017) {
            throw new Exception("日期不合法:" + s);
        }
        strDate = year + dash + month + dash + day;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        date = sdf.parse(strDate);
        LogKit.info("日期"+strDate);
    }
    LogKit.info("slash个数" + slashLength);
    if (str.contains(slash)) {
        year = str.substring(0, firstSlash).trim();
        month = slashLength == 1 ? str.substring(firstSlash, str.length()).substring(slash.length()) : str.substring(firstSlash, lastSlash).substring(slash.length());
        day = slashLength == 1 ? "1" : str.substring(lastSlash, str.length()).substring(slash.length());
        if (Integer.valueOf(month) > 12 || Integer.valueOf(day) > 31 || Integer.valueOf(year) < 2017) {
            throw new Exception("日期不合法:" + s);
        }
        strDate = year + slash + month + slash + day;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
        date = sdf.parse(strDate);
    }
    
        }
        return date;
    }