get方法里localdate转string
时间: 2023-09-06 20:07:09 浏览: 44
将LocalDate类型转换为String类型可以使用format方法,具体实现代码如下:
```
LocalDate localDate = LocalDate.now();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
String formattedDate = localDate.format(formatter);
```
此代码将当前日期格式化为"yyyy-MM-dd"的字符串。您可以根据需要修改日期格式。
相关问题
LocalDate with
Yes, you can use the `LocalDate` class in Java to work with dates without time or time zone information. It is part of the `java.time` package introduced in Java 8.
To create a `LocalDate` object, you can use the static `of` method, passing in the year, month, and day as arguments. Here's an example:
```java
import java.time.LocalDate;
public class Main {
public static void main(String[] args) {
LocalDate date = LocalDate.of(2022, 10, 31);
System.out.println(date); // Output: 2022-10-31
}
}
```
You can also get the current date using the `now` method:
```java
import java.time.LocalDate;
public class Main {
public static void main(String[] args) {
LocalDate currentDate = LocalDate.now();
System.out.println(currentDate); // Output: current date in yyyy-mm-dd format
}
}
```
Once you have a `LocalDate` object, you can perform various operations on it, such as getting the day of the week, adding or subtracting days, months, or years, comparing dates, and formatting dates.
jpa如何通过string类型参数查询数据库类型为LocalDate的数据
可以使用JPA中的@Temporal注解指定日期类型,然后使用JPQL或Criteria API查询。示例代码如下:
```
@Entity
@Table(name = "my_table")
public class MyEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "my_date")
@Temporal(TemporalType.DATE) // 指定日期类型为DATE
private LocalDate myDate;
// 省略其他属性和方法
}
```
使用JPQL查询:
```
TypedQuery<MyEntity> query = entityManager.createQuery(
"SELECT e FROM MyEntity e WHERE e.myDate = :myDate", MyEntity.class);
query.setParameter("myDate", LocalDate.parse("2021-10-01"));
List<MyEntity> results = query.getResultList();
```
使用Criteria API查询:
```
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<MyEntity> query = cb.createQuery(MyEntity.class);
Root<MyEntity> root = query.from(MyEntity.class);
query.select(root).where(cb.equal(root.get("myDate"), LocalDate.parse("2021-10-01")));
List<MyEntity> results = entityManager.createQuery(query).getResultList();
```
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)