问Log4j2:我如何获得具有纳秒精度的时间戳？

EN

package my.package;
import java.time.Instant;
import org.apache.logging.log4j.core.time.MutableInstant;
import org.apache.logging.log4j.core.time.PreciseClock;

/**
 * Provides the current time up to nanosecond precision, as supported by the platform.
 * Note that most current platforms provide only microsecond precision.
 */
public class NanoSecondClock implements PreciseClock {
    /**
     * Returns the time in milliseconds since the epoch.
     * @return the time in milliseconds since the epoch.
     */
    public long currentTimeMillis(){return System.currentTimeMillis();}
    /**
     * Initializes the specified instant with time information as accurate as available on this platform.
     * @param mutableInstant The container to be initialized with the accurate time information.
     */
    public void init(MutableInstant mutableInstant){
        Instant now=Instant.now();
        mutableInstant.initFromEpochSecond(now.getEpochSecond(),now.getNano());
    }
}