# 常用时间模式DatePattern

[DatePattern](https://github.com/ifeilong/feilong/tree/master/feilong-core/src/main/java/com/feilong/core/DatePattern.java) 内置常用的时间模式

## 1.简介

当需要 `将时间转成指定格式的字符串` 的时候,

原先你需要写成:

```java
	DateUtil.toString(new Date(), "yyyy-MM-dd HH:mm:ss")
```

现在你可以:

```java
	DateUtil.toString(new Date(), DatePattern.COMMON_DATE_AND_TIME)
```

### 1.1 优点

1. 代码可读性更高
2. 可以有效的避免由于手误带来的不必要的错误

## 2.内置pattern

以下是内置pattern:

| 常量                                                             | 值                              |
| -------------------------------------------------------------- | ------------------------------ |
| `DatePattern.COMMON_DATE`                                      | `yyyy-MM-dd`                   |
| `DatePattern.CHINESE_COMMON_DATE`                              | `yyyy年MM月dd日`                  |
| `DatePattern.COMMON_TIME`                                      | `HH:mm:ss`                     |
| `DatePattern.COMMON_TIME_WITHOUT_SECOND`                       | `HH:mm`                        |
| `DatePattern.COMMON_DATE_AND_TIME`                             | `yyyy-MM-dd HH:mm:ss`          |
| `DatePattern.CHINESE_COMMON_DATE_AND_TIME`                     | `yyyy年MM月dd日 HH:mm:ss`         |
| `DatePattern.COMMON_DATE_AND_TIME_WITH_MILLISECOND`            | `yyyy-MM-dd HH:mm:ss.SSS`      |
| `DatePattern.COMMON_DATE_AND_TIME_WITHOUT_SECOND`              | `yyyy-MM-dd HH:mm`             |
| `DatePattern.COMMON_DATE_AND_TIME_WITHOUT_YEAR_AND_SECOND`     | `MM-dd HH:mm`                  |
| `DatePattern.TIMESTAMP`                                        | `yyyyMMddHHmmss`               |
| `DatePattern.TIMESTAMP_WITH_MILLISECOND`                       | `yyyyMMddHHmmssSSS`            |
| `DatePattern.YEAR_AND_MONTH`                                   | `yyyy-MM`                      |
| `DatePattern.MONTH_AND_DAY`                                    | `MM-dd`                        |
| `DatePattern.MONTH_AND_DAY_WITH_WEEK`                          | `MM-dd(E)`                     |
| `DatePattern.ddMMyyyyHHmmss`                                   | `dd/MM/yyyy HH:mm:ss`          |
| `DatePattern.yy`                                               | `yy`                           |
| `DatePattern.yyyy`                                             | `yyyy`                         |
| `DatePattern.MM`                                               | `MM`                           |
| `DatePattern.yyyyMMdd`                                         | `yyyyMMdd`                     |
| `DatePattern.mmss`                                             | `mmss`                         |
| `DatePattern.HH`                                               | `HH`                           |
| `DatePattern.TO_STRING_STYLE`                                  | `EEE MMM dd HH:mm:ss zzz yyyy` |
| `DatePattern.DOTS_DATE` since 1.10.7                           | `yyyy.MM.dd`                   |
| `DatePattern.DOTS_DATE_AND_TIME_WITHOUT_SECOND` since 1.10.7   | `yyyy.MM.dd HH:mm`             |
| `DatePattern.DOTS_DATE_AND_TIME` since 1.10.7                  | `yyyy.MM.dd HH:mm:ss`          |
| `DatePattern.DOTS_DATE_AND_TIME_WITH_MILLISECOND` since 1.10.7 | `yyyy.MM.dd HH:mm:ss.SSS`      |


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