以下是使用Spring Boot实现此目的的策略:
-
摘要日期/时间检索
创建一个接口来抽象当前日期/时间的检索:
public interface DateTimeProvider {
Date getCurrentDate();
LocalDate getCurrentLocalDate();
LocalTime getCurrentLocalTime();
}
-
实现接口
创建一个返回实际当前日期/时间的默认实现:
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.Date;
public class DefaultDateTimeProvider implements DateTimeProvider {
@Override
public Date getCurrentDate() {
return new Date();
}
@Override
public LocalDate getCurrentLocalDate() {
return LocalDate.now();
}
@Override
public LocalTime getCurrentLocalTime() {
return LocalTime.now();
}
}
-
创建D-1实施
创建一个返回“D-1”的DateTimeProvider实现:
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.Date;
import java.util.Calendar;
public class DMinusOneDateTimeProvider implements DateTimeProvider {
@Override
public Date getCurrentDate() {
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -1);
return calendar.getTime();
}
@Override
public LocalDate getCurrentLocalDate() {
return LocalDate.now().minusDays(1);
}
@Override
public LocalTime getCurrentLocalTime() {
return LocalTime.now(); // Assuming you want to keep the time unchanged
}
}
-
在Spring Boot中配置Bean
通过将其设置为Spring Bean来配置要使用的DateTimeProvider实现。您可以使用配置文件或配置属性在默认和“D-1”提供程序之间切换。
例如,您可以在配置类中定义bean:
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
@Configuration
public class DateTimeConfig {
@Bean
@Profile("default") // Active by default
public DateTimeProvider dateTimeProvider() {
return new DefaultDateTimeProvider();
}
@Bean
@Profile("dminus1") // Activate this profile to use D-1
public DateTimeProvider dMinusOneDateTimeProvider() {
return new DMinusOneDateTimeProvider();
}
}
-
在应用程序中使用DateTimeProvider
在需要使用日期/时间值的地方注入DateTimeProvider:
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class MyService {
private final DateTimeProvider dateTimeProvider;
@Autowired
public MyService(DateTimeProvider dateTimeProvider) {
this.dateTimeProvider = dateTimeProvider;
}
public void doSomething() {
Date currentDate = dateTimeProvider.getCurrentDate();
LocalDate currentLocalDate = dateTimeProvider.getCurrentLocalDate();
LocalTime currentLocalTime = dateTimeProvider.getCurrentLocalTime();
// Use these values in your business logic
}
}
-
使用特定配置文件运行
启动Spring Boot应用程序时,可以指定在不同日期/时间提供程序之间切换的活动配置文件:
# To use the default date/time provider
java -jar myapp.jar --spring.profiles.active=default
# To use the D-1 date/time provider
java -jar myapp.jar --spring.profiles.active=dminus1