java 日期 工具类

<span style="font-size:18px;">public static final String YYYY_MM_DD_1 = "yyyy-MM-dd";/** * 格式化日期:long转化为string * @param l * @param format * @return */public static String long2String(long l, String format) {  SimpleDateFormat sdf = new SimpleDateFormat(format);  String str = sdf.format(l);  return str;}/** * 格式化日期:string转化为long * @param str * @param format * @return */public static long string2Long(String str, String format) {SimpleDateFormat sdf = new SimpleDateFormat(format);long l = 0;try {Date date = sdf.parse(str);l = date.getTime();} catch (ParseException e) {e.printStackTrace();return 0;}return l;}</span>