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Date Formatting中YYYY与yyyy的区别

写在最前面 测试代码展示YYYY与yyyy的区别: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 public class Test { public static void main(String[] args) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String dateStr = "2023-12-31 23:59:59"; try { Date date = sdf.parse(dateStr); String