JAVA中日期格式变换

JAVA中日期格式转换

/**?
???*?字符串转换为java.util.Date<br>
???*?支持格式为?yyyy.MM.dd?G?'at'?hh:mm:ss?z?如?'2002-1-1?AD?at?22:10:59?PSD'<br>
???*?yy/MM/dd?HH:mm:ss?如?'2002/1/1?17:55:00'<br>
???*?yy/MM/dd?HH:mm:ss?pm??如?'2002/1/1?17:55:00?pm'<br>
???*?yy-MM-dd?HH:mm:ss?如?'2002-1-1?17:55:00'?<br>
???*?yy-MM-dd?HH:mm:ss?am?如?'2002-1-1?17:55:00?am'?<br>
???*??@param??time?String?字符串<br>
???*??@return??Date?日期<br>
????*/?
????public???static??Date?stringToDate(String?time)?{
????SimpleDateFormat?formatter;
?????int??tempPos?=?time.indexOf(?"?AD?"?)?;
????time?=?time.trim()?;
????formatter??=???new??SimpleDateFormat?(?"?yyyy.MM.dd?G?'at'?hh:mm:ss?z?"?);
?????if?(tempPos?>-?1?)?{
??????time?=?time.substring(?0?,tempPos)?+?
????????????"?公元?"?+?time.substring(tempPos?+?"?AD?"?.length());?//?china?
???????formatter??=???new??SimpleDateFormat?(?"?yyyy.MM.dd?G?'at'?hh:mm:ss?z?"?);
????}?
????tempPos?=?time.indexOf(?"?-?"?);
?????if?(tempPos?>-?1?&&?(time.indexOf(?"???"?)?<?0?))?{
??????formatter??=???new??SimpleDateFormat?(?"?yyyyMMddHHmmssZ?"?);
????}?
??????else???if?((time.indexOf(?"?/?"?)?>-?1?)??&&?(time.indexOf(?"???"?)?>-?1?))?{
??????formatter??=???new??SimpleDateFormat?(?"?yyyy/MM/dd?HH:mm:ss?"?);
????}?
??????else???if?((time.indexOf(?"?-?"?)?>-?1?)??&&?(time.indexOf(?"???"?)?>-?1?))?{
??????formatter??=???new??SimpleDateFormat?(?"?yyyy-MM-dd?HH:mm:ss?"?);
????}?
??????else???if?((time.indexOf(?"?/?"?)?>-?1?)??&&?(time.indexOf(?"?am?"?)?>-?1?)??||?(time.indexOf(?"?pm?"?)?>-?1?))?{
??????formatter??=???new??SimpleDateFormat?(?"?yyyy-MM-dd?KK:mm:ss?a?"?);
????}?
??????else???if?((time.indexOf(?"?-?"?)?>-?1?)??&&?(time.indexOf(?"?am?"?)?>-?1?)??||?(time.indexOf(?"?pm?"?)?>-?1?))?{
??????formatter??=???new??SimpleDateFormat?(?"?yyyy-MM-dd?KK:mm:ss?a?"?);
????}?
????ParsePosition?pos??=???new??ParsePosition(?0?);
????java.util.Date?ctime??=??formatter.parse(time,?pos);

?????return??ctime;
??}?
????/**?
???*?将java.util.Date?格式转换为字符串格式'yyyy-MM-dd?HH:mm:ss'(24小时制)<br>
???*?如Sat?May?11?17:24:21?CST?2002?to?'2002-05-11?17:24:21'<br>
???*??@param??time?Date?日期<br>
???*??@return??String???字符串<br>
????*/?
???

???public???static??String?dateToString(Date?time)?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?yyyy-MM-dd?HH:mm:ss?"?);
????String?ctime??=??formatter.format(time);

?????return??ctime;
??}?
????/**?
???*?将java.util.Date?格式转换为字符串格式'yyyy-MM-dd?HH:mm:ss?a'(12小时制)<br>
???*?如Sat?May?11?17:23:22?CST?2002?to?'2002-05-11?05:23:22?下午'<br>
???*??@param??time?Date?日期<br>
???*??@param??x?int?任意整数如：1<br>
???*??@return??String?字符串<br>
????*/?
????public???static??String?dateToString(Date?time,?int??x)?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?yyyy-MM-dd?KK:mm:ss?a?"?);
????String?ctime??=??formatter.format(time);

?????return??ctime;
??}?
????/**?
???*取系统当前时间:返回只值为如下形式
???*2002-10-30?20:24:39
???*??@return??String
????*/?
????public???static??String?Now()?{
?????return??dateToString(?new??Date());
??}?
?
????/**?
???*取系统当前时间:返回只值为如下形式
???*2002-10-30?08:28:56?下午
???*?@param??hour?为任意整数
???*?@return??String
????*/?
????public???static??String?Now(?int??hour)?{
?????return??dateToString(?new??Date(),hour);
??}?
????/**?
???*取系统当前时间:返回值为如下形式
???*2002-10-30
???*?@return??String
????*/?
????public???static??String?getYYYY_MM_DD()?{
?????return??dateToString(?new??Date()).substring(?0?,?10?);

??}?
????/**?
???*取系统给定时间:返回值为如下形式
???*2002-10-30
???*?@return??String
????*/?
?????public???static??String?getYYYY_MM_DD(String?date)?{
?????return??date.substring(?0?,?10?);

??}?
?
????public???static??String?getHour()?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?H?"?);
????String?ctime??=??formatter.format(?new??Date());
?????return??ctime;
????}?
?
????public???static??String?getDay()?{
??????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?d?"?);
????String?ctime??=??formatter.format(?new??Date());
?????return??ctime;
????}?
?
????public???static??String?getMonth()?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?M?"?);
????String?ctime??=??formatter.format(?new??Date());
?????return??ctime;
????}?
??

???public???static??String?getYear()?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?yyyy?"?);
????String?ctime??=??formatter.format(?new??Date());
?????return??ctime;
????}?
??????
???public???static??String?getWeek()?{
????SimpleDateFormat?formatter;
????formatter??=???new??SimpleDateFormat?(?"?E?"?);
????String?ctime??=??formatter.format(?new??Date());
?????return??ctime;
????}??