对于一个项目的开发中，日期时间格式的处理会被频繁使用，这里就针对于java中 Date、Calendar 和 time 三个日期时间使用 thymeleaf 模板引擎进行处理进行介绍

1、导入依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

2、进行操作

1. #dates

这些方法都是针对 java.util.Date 包下的日期时间类:

/*
 * 使用标准语言环境格式格式化日期
 */
${#dates.format(date)}
${#dates.arrayFormat(datesArray)}
${#dates.listFormat(datesList)}
${#dates.setFormat(datesSet)}

/*
 * Format date with the ISO8601 format
 * 使用ISO8601格式格式化日期
 */
${#dates.formatISO(date)}
${#dates.arrayFormatISO(datesArray)}
${#dates.listFormatISO(datesList)}
${#dates.setFormatISO(datesSet)}

/*
 * 自定义格式化日期
 */
${#dates.format(date, 'dd/MMM/yyyy HH:mm')}
${#dates.arrayFormat(datesArray, 'dd/MMM/yyyy HH:mm')}
${#dates.listFormat(datesList, 'dd/MMM/yyyy HH:mm')}
${#dates.setFormat(datesSet, 'dd/MMM/yyyy HH:mm')}

/*
 * 获取日期的属性
 */
${#dates.day(date)}
${#dates.month(date)}
${#dates.monthName(date)}
${#dates.monthNameShort(date)}
${#dates.year(date)}
${#dates.dayOfWeek(date)}
${#dates.dayOfWeekName(date)}
${#dates.dayOfWeekNameShort(date)}
${#dates.hour(date)}
${#dates.minute(date)}
${#dates.second(date)}
${#dates.millisecond(date)}

/*
 * 创建日期（java.util.Date）对象
 */
${#dates.create(year,month,day)}
${#dates.create(year,month,day,hour,minute)}
${#dates.create(year,month,day,hour,minute,second)}
${#dates.create(year,month,day,hour,minute,second,millisecond)}

/*
 * 为当前日期和时间创建一个日期（java.util.Date）对象
 */
${#dates.createNow()}

${#dates.createNowForTimeZone()}

/*
 * 为当前日期创建一个日期（java.util.Date）对象（时间设置为00:00）
 */
${#dates.createToday()}

${#dates.createTodayForTimeZone()}

2. #calendars

类似于#dates，但对于java.util.Calendar对象：

/*
 * 使用标准语言环境格式设置日历格式
 */
${#calendars.format(cal)}
${#calendars.arrayFormat(calArray)}
${#calendars.listFormat(calList)}
${#calendars.setFormat(calSet)}

/*
 * 使用ISO8601格式格式化日历
 */
${#calendars.formatISO(cal)}
${#calendars.arrayFormatISO(calArray)}
${#calendars.listFormatISO(calList)}
${#calendars.setFormatISO(calSet)}

/*
 * 使用指定的格式格式化日历
 */
${#calendars.format(cal, 'dd/MMM/yyyy HH:mm')}
${#calendars.arrayFormat(calArray, 'dd/MMM/yyyy HH:mm')}
${#calendars.listFormat(calList, 'dd/MMM/yyyy HH:mm')}
${#calendars.setFormat(calSet, 'dd/MMM/yyyy HH:mm')}

/*
 * 获取日历属性
 */
${#calendars.day(date)}
${#calendars.month(date)}
${#calendars.monthName(date)}
${#calendars.monthNameShort(date)}
${#calendars.year(date)}
${#calendars.dayOfWeek(date)}
${#calendars.dayOfWeekName(date)}
${#calendars.dayOfWeekNameShort(date)}
${#calendars.hour(date)}
${#calendars.minute(date)}
${#calendars.second(date)}
${#calendars.millisecond(date)}

/*
 * 从其组件创建日历（java.util.Calendar）对象
 */
${#calendars.create(year,month,day)}
${#calendars.create(year,month,day,hour,minute)}
${#calendars.create(year,month,day,hour,minute,second)}
${#calendars.create(year,month,day,hour,minute,second,millisecond)}

${#calendars.createForTimeZone(year,month,day,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,second,timeZone)}
${#calendars.createForTimeZone(year,month,day,hour,minute,second,millisecond,timeZone)}

/*
 * 为当前日期和时间创建一个日历（java.util.Calendar）对象
 */
${#calendars.createNow()}

${#calendars.createNowForTimeZone()}

/*
 * 创建当前日期（时间设置为00:00）的日历（java.util.Calendar）对象
 */
${#calendars.createToday()}

${#calendars.createTodayForTimeZone()}

3. #temporals

针对 java.time.LocalDate 和 java.time.LocalDateTime java8 新时间类的支持

<dependency>
    <groupId>org.thymeleaf.extras</groupId>
    <artifactId>thymeleaf-extras-java8time</artifactId>
    <version>3.0.4.RELEASE</version>
</dependency>

或者 thymeleaf spring-boot-starter-thymeleaf 场景中已经引入 thymeleaf-extras-java8time

/*
 * 使用ISO8601格式格式化日期
 */
${#temporals.formatISO(localDateTime)}
${#temporals.formatISO(localDate)}
${#temporals.formatISO(timestamp)}

/*
 * 自定义格式格式化日期
 */
${#temporals.format(localDateTime, 'yyyy-MM-dd HH:mm:ss')}
${#temporals.format(localDate, 'yyyy-MM')}

/*
 * 在java8的java.time中获取时间属性
 */
${#temporals.day(date)}
${#temporals.month(date)}
${#temporals.monthName(date)}
${#temporals.monthNameShort(date)}
${#temporals.year(date)}
${#temporals.dayOfWeek(date)}
${#temporals.dayOfWeekName(date)}
${#temporals.dayOfWeekNameShort(date)}
${#temporals.hour(date)}
${#temporals.minute(date)}
${#temporals.second(date)}
${#temporals.millisecond(date)}