我要评论一、date转localdatetime
@test
public void test06(){
simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss");
// date
date date = new date();
system.out.println("date\t" + sdf.format(date));
// date 转 localdatetime
datetimeformatter dtf = datetimeformatter.ofpattern("yyyy-mm-dd hh:mm:ss");
localdatetime datetolocaldatetime = date.toinstant().atzone(zoneid.systemdefault()).tolocaldatetime();
system.out.println("date to localdatetime\t" + dtf.format(datetolocaldatetime));
}二、date转localdate
@test
public void test07(){
simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss");
// date
date date = new date();
system.out.println("date\t" + sdf.format(date));
// date 转 localdate
// 注意 localdate 只能有年月日，格式化日期不能有时分秒，否则会报错
datetimeformatter dtf = datetimeformatter.ofpattern("yyyy-mm-dd");
localdate datetolocaldate = date.toinstant().atzone(zoneid.systemdefault()).tolocaldate();
system.out.println("date to localdate\t" + dtf.format(datetolocaldate));
}三、localdatetime转localdate
@test
public void test08(){
// localdatetime 转 localdate
datetimeformatter dtf = datetimeformatter.ofpattern("yyyy-mm-dd");
localdate localdatetimetolocaldate = localdatetime.now().tolocaldate();
system.out.println("localdatetime to localdate\t" + dtf.format(localdatetimetolocaldate));
}四、localdatetime转localtime
@test
public void test09(){
// localdatetime 转 localtime
// 注意 localtime 只能有时分秒，格式化日期不能有年月日，否则会报错
datetimeformatter dtf = datetimeformatter.ofpattern("hh:mm:ss");
localtime localdatetimetolocaltime = localdatetime.now().tolocaltime();
system.out.println("localdatetime to localtime\t" + dtf.format(localdatetimetolocaltime));
}五、localdatetime转date
@test
public void test10(){
simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss");
// localdatetime 转 date
zoneid zoneid = zoneid.systemdefault();
date localdatetimetodate = date.from(localdatetime.now().atzone(zoneid).toinstant());
system.out.println("localdatetime to date\t" + sdf.format(localdatetimetodate));
}六、localdate转date
@test
public void test11(){
simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh:mm:ss");
// localdate 转 date
date localdatetodate = date.from(localdate.now().atstartofday(zoneid.systemdefault()).toinstant());
system.out.println("localdate to date\t" + sdf.format(localdatetodate));
}七、时间戳转localdatetime
@test
public void test12(){
datetimeformatter dtf = datetimeformatter.ofpattern("yyyy-mm-dd hh:mm:ss");
// 时间戳 转 localdatetime
long timestamp = localdatetime.now().toinstant(zoneoffset.of("+8")).toepochmilli();
localdatetime time2 = localdatetime.ofepochsecond(timestamp/1000,0,zoneoffset.ofhours(8));
system.out.println("时间戳 to localdatetime\t" + dtf.format(time2));
}总结
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