freemaker日期格式化处理

date: 只显示日期，不显示时间.

如${createTime?date} 或${createTime?date('yyyy-MM-dd')}

time: 只显示时间，不显示日期
如${createTime?time} 或${createTime?time('hh:mm:ss')}
datetime: 时间和日期同时显示

如${createTime} 或${createTime?datetime('yyyy-MM-dd hh:mm:ss'或${createTime?string('yyyy-MM-dd hh:mm:ss')}

${createTime?string.short}  01:45 PM
${createTime?string.medium}  01:45:09 PM
${createTime?string.long}  01:45:09 PM PST
${createTime?string.full}  01:45:09 PM PST
${createTime?string.xs}  13:45:09-08:00
${createTime?string.iso}  13:45:09-08:00