luz2/src/com/lavans/luz2/commons/DateUtils.java

   1 package com.lavans.luz2.commons;\r
   2 \r
   3 import java.text.SimpleDateFormat;\r
   4 import java.util.Calendar;\r
   5 import java.util.Date;\r
   6 \r
   7 import org.apache.commons.logging.Log;\r
   8 import org.apache.commons.logging.LogFactory;\r
   9 \r
  10 public class DateUtils {\r
  11         /** logger */\r
  12         private static Log logger = LogFactory.getLog(DateUtils.class);\r
  13 \r
  14         /**\r
  15          * 受け取ったDate型に日付演算した結果をDate型返す。\r
  16          * dateがnullなら現在時刻から\r
  17          * @param str\r
  18          */\r
  19         public static Date getDateAdd(Date date, int field, int add){\r
  20                 Calendar cal =Calendar.getInstance();\r
  21                 if(date!=null){\r
  22                         cal.setTime(date);\r
  23                 }\r
  24                 cal.add(field, add);\r
  25                 return cal.getTime();\r
  26         }\r
  27 \r
  28         /**\r
  29          * 文字列からDateを作成。\r
  30          * パースできない場合はnull。\r
  31          *\r
  32          * @param dateStr\r
  33          * @return\r
  34          */\r
  35         public static Date getDate(String dateStr){\r
  36                 return getDate(dateStr, getFormat(dateStr));\r
  37         }\r
  38         /**\r
  39          * yyyy/MM/dd形式の文字列からDate型を作成。\r
  40          * 与えられた文字列を見てパース方法を判断する。\r
  41          * @param str\r
  42          * @return\r
  43          */\r
  44         private static final String FORMAT_DATE = "yyyy/MM/dd";\r
  45         private static final String FORMAT_MIN  = "yyyy/MM/dd HH:mm";\r
  46         private static final String FORMAT_MSEC = "yyyy/MM/dd HH:mm:ss";\r
  47         private static final String FORMAT_SEC = "yyyy/MM/dd HH:mm:ss.SSS";\r
  48         private static String getFormat(String str){\r
  49                 str = str.trim();\r
  50                 String result = null;\r
  51                 if(str.contains(":")){\r
  52                         // 時刻含む\r
  53                         if(str.indexOf(":")==str.lastIndexOf(":")){\r
  54                                 // コロンが一つなら\r
  55                                 result = FORMAT_MIN;\r
  56                         }else{\r
  57                                 // コロンが二つなら\r
  58                                 if(str.contains(".")){\r
  59                                         // ミリ秒も含む\r
  60                                         result = FORMAT_MSEC;\r
  61                                 }else{\r
  62                                         // 秒まで\r
  63                                         result = FORMAT_SEC;\r
  64                                 }\r
  65                         }\r
  66                 }else{\r
  67                         result = FORMAT_DATE;\r
  68                 }\r
  69                 \r
  70                 // yyyy/MM/ddのの他にもyyyy-MM-ddも使えるようにする\r
  71                 if(str.length()>10){\r
  72                         if(str.charAt(4)=='-' && str.charAt(6)=='-'){\r
  73                                 FORMAT_DATE.replace("/", "-");\r
  74                         }\r
  75                 }\r
  76                 \r
  77                 return result;\r
  78         }\r
  79 \r
  80         /**\r
  81          * 指定された日付文字列とフォーマットでDate型を作成。\r
  82          * @param dateStr\r
  83          * @param dateFormat\r
  84          * @return\r
  85          */\r
  86         public static Date getDate(String dateStr, String dateFormat){\r
  87                 if(dateStr==null) return null;\r
  88                 SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);\r
  89                 Date date = null;\r
  90                 try {\r
  91                         date = sdf.parse(dateStr);\r
  92                 } catch (Exception e) {\r
  93                         logger.debug(e.getMessage());\r
  94                 }\r
  95 \r
  96                 return date;\r
  97         }\r
  98 \r
  99         /**\r
 100          * 時刻を空にする\r
 101          * パースできない場合はnull。\r
 102          *\r
 103          * @param dateStr\r
 104          * @return\r
 105          */\r
 106         public static Date cleartime(Date date){\r
 107                 Calendar cal = Calendar.getInstance();\r
 108                 cal.setTime(date);\r
 109                 cal.set(Calendar.HOUR_OF_DAY, 0);\r
 110                 cal.set(Calendar.MINUTE, 0);\r
 111                 cal.set(Calendar.SECOND, 0);\r
 112                 cal.set(Calendar.MILLISECOND, 0);\r
 113                 return cal.getTime();\r
 114         }\r
 115 }\r