java中判断给定一个日期string格式,判断今天是否在指定日期时间的这一周内
时间: 2023-09-11 16:05:56 浏览: 83
可以通过将日期字符串转换为`LocalDate`对象,然后再将其转换为`LocalDateTime`对象,接着按照上述方法进行判断。
具体步骤如下:
1. 将给定的日期字符串转换为`LocalDate`对象。
```java
String dateString = "2021-11-08";
LocalDate date = LocalDate.parse(dateString);
```
2. 将`LocalDate`对象转换为`LocalDateTime`对象。
```java
LocalDateTime dateTime = date.atStartOfDay();
```
3. 获取当前日期时间的`LocalDateTime`对象。
```java
LocalDateTime now = LocalDateTime.now();
```
4. 计算给定日期时间所在周的开始时间和结束时间。
```java
LocalDateTime startOfWeek = dateTime.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)).with(LocalTime.MIN);
LocalDateTime endOfWeek = startOfWeek.plusDays(6).with(LocalTime.MAX);
```
5. 判断当前日期时间是否在指定日期时间的这一周内。
```java
boolean isInWeek = now.isAfter(startOfWeek) && now.isBefore(endOfWeek);
```
完整代码如下:
```java
import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.temporal.TemporalAdjusters;
public class DateTimeExample {
public static void main(String[] args) {
String dateString = "2021-11-08";
LocalDate date = LocalDate.parse(dateString);
LocalDateTime dateTime = date.atStartOfDay();
LocalDateTime now = LocalDateTime.now();
LocalDateTime startOfWeek = dateTime.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)).with(LocalTime.MIN);
LocalDateTime endOfWeek = startOfWeek.plusDays(6).with(LocalTime.MAX);
boolean isInWeek = now.isAfter(startOfWeek) && now.isBefore(endOfWeek);
System.out.println(isInWeek);
}
}
```
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