时间格式化类, 可格式化为XXX秒前,XXX分钟前,XXX小时代码,Java代码库,德仔网

代码语言
代码分类
【Java】时间格式化类, 可格式化为XXX秒前,XXX分钟前,XXX小时
作者:dezai / 发布于2014/2/25/ 234
时间格式化类, 可格式化为XXX秒前,XXX分钟前,XXX小时前
时间日期格式化类
Java 代码
/**
* 时 间日期格式化类
* @author yeyong
*
*/ 
public class PrettyDateFormat extends SimpleDateFormat { 
 private static final long serialVersionUID = 1L; 
 private Pattern pattern = Pattern.compile("('*)(#{1,2}|@)"); 
 private FormatType formatType = FormatType.DEAFULT; 
 private SimpleDateFormat simpleDateFormat; 

 private enum FormatType { 
  DEAFULT, TIME, DAY 
 }; 

 /**
 * 构 造器
 * format 中的@表示[XXX秒前,XXX分钟前,XXX小时前(最多是23小时前)]
 * format中的#表示[空字串(表示今天),昨天,前天]
 * format中的##表示[今天,昨天,前天]
 * 
 * @param format 和SimpleDateFormat中的格式设置基本上是一样的,只是多的@格 式 #格式和##格式
 * @param fullFormat 和 SimpleDateFormat中的格式设置是一样的
 */ 
 public PrettyDateFormat(String format, String fullFormat) { 
  super(fullFormat); 
  Matcher m = pattern.matcher(format); 
  while (m.find()) { 
   if (m.group(1).length() % 2 == 0) { 
    if ("@".equals(m.group(2))) { 
     if (formatType == FormatType.DAY) { 
      throw new IllegalArgumentException("#和@模式字符不能同时使用."); 
     } 
     formatType = FormatType.TIME; 
    } else { 
     if (formatType == FormatType.TIME) { 
      throw new IllegalArgumentException("#和@模式字符不能同时使用."); 
     } 
     formatType = FormatType.DAY; 
    } 
   } 
  } 
  this.simpleDateFormat = new SimpleDateFormat(format.replace("'", "''")); 
 } 

 @Override 
 public Object parseObject(String source, ParsePosition pos) { 
  throw new UnsupportedOperationException("暂时还不支持的操作"); 
 } 

 /*
 * (non-Javadoc)
 * @see java.text.SimpleDateFormat#format(java.util.Date, 
        java.lang.StringBuffer, java.text.FieldPosition)
 */ 
 public StringBuffer format(Date date, StringBuffer toAppendTo, 
       FieldPosition pos) { 
  if (formatType == FormatType.DEAFULT) { 
   return super.format(date, toAppendTo, pos); 
  } 

  long curTime = System.currentTimeMillis(); 

  long diffDay = 0L; 
  long diffSecond = 0L; 
  if (formatType == FormatType.TIME) { 
   diffSecond = (curTime - date.getTime()) / 1000L; 
   if (diffSecond < 0 || diffSecond >= 86400) { 
    return super.format(date, toAppendTo, pos); 
   } 
  } 
  if (formatType == FormatType.DAY) { 
   Calendar curDate = new GregorianCalendar(); 
   curDate.setTime(new Date(curTime)); 
   curDate.set(Calendar.HOUR_OF_DAY, 23); 
   curDate.set(Calendar.MINUTE, 59); 
   curDate.set(Calendar.SECOND, 59); 
   curDate.set(Calendar.MILLISECOND, 999); 
   diffDay = (curDate.getTimeInMillis() - date.getTime()) / 86400000L; 
   if (diffDay < 0 || diffDay > 2) { 
    return super.format(date, toAppendTo, pos); 
   } 
  } 
  StringBuffer sb = new StringBuffer(); 
  Matcher m = pattern.matcher(simpleDateFormat.format(date)); 
  if (m.find()) { 
   String group2 = m.group(2); 
   String replacement = ""; 
   while (true) { 
    if ("@".equals(group2)) { 
     if (diffSecond < 60) { 
      replacement = diffSecond == 0 ? "1秒前" : diffSecond + "秒前"; 
     } else if (diffSecond < 3600) { 
      replacement = diffSecond / 60 + "分钟前"; 
     } else if (diffSecond < 86400) { 
      replacement = diffSecond / 3600 + "小时前"; 
     } 
    } else { 
     if (diffDay == 0) { 
      replacement = group2.length() == 2 ? "今天" : ""; 
     } else if (diffDay == 1) { 
      replacement = "昨天"; 
     } else { 
      replacement = "前天"; 
     } 
    } 
    m.appendReplacement(sb, replacement); 
    if (!m.find()) { 
     break; 
    } 
   } 
   m.appendTail(sb); 
  } 
  return toAppendTo.append(sb.toString()); 
 } 
}
试试其它关键字
　时间格式化　
同语言下
可能有用的
dezai贡献的其它代码(1065)