(Java) 2014年1月1日减一个月涉及时间与字符的转换

 1 import java.text.ParseException;
 2 import java.text.SimpleDateFormat;
 3 import java.util.Calendar;
 4 import java.util.Date;
 5 
 6 
 7 public class TestMinusOneMonth {
 8 
 9     public static void main(String[] args) {
10         String string = "2014-01-01";
11         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
12         try {
13             Date date = sdf.parse(string);
14             Calendar calendar = Calendar.getInstance();
15             calendar.setTime(date);
16             calendar.add(Calendar.MONTH, -1);
17             date = calendar.getTime();
18             string = sdf.format(date);
19             System.out.println(string); //2013-12-01
20         } catch (ParseException e) {
21             e.printStackTrace();
22         }
23     }
24 }