joda date DateTimeFormatterBuilder append가 작동하지 않습니다.

Question

코드를 먼저 작성하십시오.

@Test 
public void testDateFormat() 
{ 
    // this is ok 
    DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss").parseDateTime("2014-5-15 20:00:00"); 
    DateTimeFormat.forPattern("yyyy-MM-dd").parseDateTime("2014-5-15"); 

    DateTimeFormatter formatter = new DateTimeFormatterBuilder() 
      .appendPattern("yyyy-MM-dd HH:mm:ss") 
      .appendPattern("yyyy-MM-dd") 
      // ues these way is also failed. 
      //.append(DateTimeFormat.forPattern("xxxx")) 
      //.append(DateTimeFormat.forPattern("xxxx").getParser()) 
      .toFormatter(); 

    try 
    { 
     formatter.parseLocalDateTime("2014-5-15 20:00:00"); 
    }catch (Exception ignored){System.out.println("Failed A");} 
    try 
    { 
     formatter.parseLocalDateTime("2014-05-15 20:00:00"); 
    }catch (Exception ignored){System.out.println("Failed B");} 
    try 
    { 
     formatter.parseLocalDateTime("2014-5-15"); 
    }catch (Exception ignored){System.out.println("Failed C");} 
    try 
    { 
     formatter.parseLocalDateTime("2014-05-15"); 
    }catch (Exception ignored){System.out.println("Failed D");} 
} 

출력

Failed A:Invalid format: "2014-5-15 20:00:00" is too short 
Failed B:Invalid format: "2014-05-15 20:00:00" is too short 
Failed C:Invalid format: "2014-5-15" is too short 
Failed D:Invalid format: "2014-05-15" is too short 

모두 실패했습니다. 내가 뭔가 잘못하고 있는거야? 괜찮을 것 같습니다.

Answer 1

이 작업을 수행하려면 this

오른쪽 길을 발견.

DateTimeFormatter formatter = new DateTimeFormatterBuilder() 
      .append(null, 
        new DateTimeParser[]{DateTimeFormat.forPattern("yyyy-MM-dd").getParser(), 
          DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss").getParser()}) 
      .toFormatter();