Java 常见的日期转换（Timestamp、Calendar、Date、String）

桃扇骨 2023-10-11 23:27 80阅读 0赞

### 文章目录 ###

*  Java 常见的日期转换（Timestamp、Calendar、Date、String）
 *   *   *  1、Timestamp 转 Calendar
         *  2、Timestamp 转 Date
         *  3、Timestamp 转 String
         *  4、Calendar 转 Timestamp
         *  5、Calendar 转 Date
         *  6、Calendar 转 String
         *  7、Date 转 Calendar
         *  8、Date 转 Timestamp
         *  9、Date 转 String
         *  10、String 转 Calendar
         *  11、String 转 Timestamp
         *  12、String 转 Date
 *  附录：日期转换工具类

# Java 常见的日期转换（Timestamp、Calendar、Date、String） #

> **日期类型：**
> 
>  *  **Timestamp：** java.sql.Timestamp
>  *  **Calendar：** java.util.Calendar
>  *  **Date：** java.util.Date
>  *  **String：** java.lang.String

### 1、Timestamp 转 Calendar ###

Timestamp timestamp = Timestamp.valueOf("2023-06-06 21:39:52");
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTime(timestamp);

### 2、Timestamp 转 Date ###

Timestamp timestamp = Timestamp.valueOf("2023-06-06 21:39:52");
    		long time = timestamp.getTime();
    		Date date = new Date(time);

### 3、Timestamp 转 String ###

Timestamp timestamp = Timestamp.valueOf("2023-06-06 21:39:52");
    		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		String dateStr = sdf.format(timestamp);

### 4、Calendar 转 Timestamp ###

Calendar calendar = Calendar.getInstance();
    		long time = calendar.getTimeInMillis();
    		Timestamp timestamp = new Timestamp(time);

### 5、Calendar 转 Date ###

Calendar calendar = Calendar.getInstance();
    		Date date = calendar.getTime();

### 6、Calendar 转 String ###

Calendar calendar = Calendar.getInstance();
    		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    		String dateStr = sdf.format(calendar.getTime());

### 7、Date 转 Calendar ###

Date date = new Date();
    		Calendar calendar = Calendar.getInstance();
    		calendar.setTime(date);

### 8、Date 转 Timestamp ###

Date date = new Date();
    		long time = date.getTime