SimpleDateFormat & parse

SimpleDateFormat & parse

SimpleDateFormat format1 = new SimpleDateFormat("yyyyMMdd");
  try{
           System.out.println(format1.format(format1.parse("20090801"))); 
  }catch(Exception e){
 }
上面运行结果是20090801

SimpleDateFormat format1 = new SimpleDateFormat("yyyyMMdd");
  try{
           System.out.println(format1.format(format1.parse("2009-08-01"))); 
  }catch(Exception e){
 }
上面运行两次以上的结果是20081208