Java日期转换SimpleDateFormat格式大全

约定不等于承诺〃 2022-01-17 04:27 327阅读 0赞

进入 24小时制时间显示:

<table style="margin:0px; padding:0px; color:rgb(85,85,85); font-family:Simsun; font-size:14px; line-height:24px; border-collapse:collapse"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"> <code style="margin:0px; padding:0px">public&nbsp;class&nbsp;Datetime&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;static&nbsp;void&nbsp;main(String&nbsp;args[]){ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;java.util.Date&nbsp;current=new&nbsp;java.util.Date(); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;java.text.SimpleDateFormat&nbsp;sdf=new&nbsp;java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;c=sdf.format(current); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(c); &nbsp;&nbsp;&nbsp;&nbsp;} }</code> </td> 
 </tr> 
 </tbody> 
</table>

12小时制时间显示:

<table style="margin:0px; padding:0px; color:rgb(85,85,85); font-family:Simsun; font-size:14px; line-height:24px; border-collapse:collapse"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"> <code style="margin:0px; padding:0px"> public&nbsp;class&nbsp;Datetime&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;static&nbsp;void&nbsp;main(String&nbsp;args[]){ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;java.util.Date&nbsp;current=new&nbsp;java.util.Date(); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;java.text.SimpleDateFormat&nbsp;sdf=new&nbsp;java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss");&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;c=sdf.format(current); &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;System.out.println(c); &nbsp;&nbsp;&nbsp;&nbsp;} } </code> </td> 
 </tr> 
 </tbody> 
</table>

两者区别:yyyy-MM-dd HH:mm:ss ;  yyyy-MM-dd hh:mm:ss

如下:

<table style="margin:0px; padding:0px; color:rgb(85,85,85); font-family:Simsun; font-size:14px; line-height:24px"> 
 <tbody style="margin:0px; padding:0px"> 
 <tr style="margin:0px; padding:0px"> 
 <th align="left" style="margin:0px; padding:0px">字母</th> 
 <th align="left" style="margin:0px; padding:0px">日期或时间元素</th> 
 <th align="left" style="margin:0px; padding:0px">表示</th> 
 <th align="left" style="margin:0px; padding:0px">示例</th> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">G</code></td> 
 <td style="margin:0px; padding:0px">Era 标志符</td> 
 <td style="margin:0px; padding:0px">Text</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">AD</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">y</code></td> 
 <td style="margin:0px; padding:0px">年</td> 
 <td style="margin:0px; padding:0px">Year</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">1996</code>;&nbsp;<code style="margin:0px; padding:0px">96</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">M</code></td> 
 <td style="margin:0px; padding:0px">年中的月份</td> 
 <td style="margin:0px; padding:0px">Month</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">July</code>;&nbsp;<code style="margin:0px; padding:0px">Jul</code>;&nbsp;<code style="margin:0px; padding:0px">07</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">w</code></td> 
 <td style="margin:0px; padding:0px">年中的周数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">27</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">W</code></td> 
 <td style="margin:0px; padding:0px">月份中的周数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">2</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">D</code></td> 
 <td style="margin:0px; padding:0px">年中的天数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">189</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">d</code></td> 
 <td style="margin:0px; padding:0px">月份中的天数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">10</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">F</code></td> 
 <td style="margin:0px; padding:0px">月份中的星期</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">2</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">E</code></td> 
 <td style="margin:0px; padding:0px">星期中的天数</td> 
 <td style="margin:0px; padding:0px">Text</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">Tuesday</code>;&nbsp;<code style="margin:0px; padding:0px">Tue</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">a</code></td> 
 <td style="margin:0px; padding:0px">Am/pm 标记</td> 
 <td style="margin:0px; padding:0px">Text</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">PM</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">H</code></td> 
 <td style="margin:0px; padding:0px">一天中的小时数（0-23）</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">0</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">k</code></td> 
 <td style="margin:0px; padding:0px">一天中的小时数（1-24）</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">24</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">K</code></td> 
 <td style="margin:0px; padding:0px">am/pm 中的小时数（0-11）</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">0</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">h</code></td> 
 <td style="margin:0px; padding:0px">am/pm 中的小时数（1-12）</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">12</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">m</code></td> 
 <td style="margin:0px; padding:0px">小时中的分钟数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">30</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">s</code></td> 
 <td style="margin:0px; padding:0px">分钟中的秒数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">55</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">S</code></td> 
 <td style="margin:0px; padding:0px">毫秒数</td> 
 <td style="margin:0px; padding:0px">Number</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">978</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">z</code></td> 
 <td style="margin:0px; padding:0px">时区</td> 
 <td style="margin:0px; padding:0px">General time zone</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">Pacific Standard Time</code>;&nbsp;<code style="margin:0px; padding:0px">PST</code>;&nbsp;<code style="margin:0px; padding:0px">GMT-08:00</code></td> 
 </tr> 
 <tr style="margin:0px; padding:0px"> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">Z</code></td> 
 <td style="margin:0px; padding:0px">时区</td> 
 <td style="margin:0px; padding:0px">RFC 822 time zone</td> 
 <td style="margin:0px; padding:0px"><code style="margin:0px; padding:0px">-0800</code></td> 
 </tr> 
 </tbody> 
</table>

[http://www.bitscn.com/pdb/java/200809/150766.html][http_www.bitscn.com_pdb_java_200809_150766.html]

[http_www.bitscn.com_pdb_java_200809_150766.html]: http://www.bitscn.com/pdb/java/200809/150766.html