java date parse missbehaviour [复制]

参见英文答案 > Parsing a string to date format in java defaults date to 1 and month to January2个

SimpleDateFormat sdf = new SimpleDateFormat("MMM dd,YYYY,EEE",Locale.US);

System.out.println(sdf.format(new Date()));
System.out.println(sdf.format(sdf.parse("Apr 27,2018,Fri")));

Java不会按预期解析日期并输出：

Apr 27,Fri
Jan 05,Fri // I can not understand why java parse the month of April as January

解决方法

你的问题是你使用YYYY代表周年,而你想要代表年份的yyyy,请参阅所有选项 here.

SimpleDateFormat sdf = new SimpleDateFormat("MMM dd,yyyy,Locale.US);