如何在Java中转换UTC和本地时区

import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class TimeZoneConversion {
    public static void main(String[] args) {
        // 示例UTC时间字符串
        String utcTimeString = "2023-10-05T12:00:00Z";
        
        // 解析UTC时间字符串为ZonedDateTime对象
        ZonedDateTime utcDateTime = ZonedDateTime.parse(utcTimeString, DateTimeFormatter.ISO_ZONED_DATE_TIME);
        
        // 获取本地时区
        ZoneId localZoneId = ZoneId.systemDefault();
        
        // 转换为本地时区时间
        ZonedDateTime localDateTime = utcDateTime.withZoneSameInstant(localZoneId);
        
        // 格式化输出
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
        System.out.println("UTC Time: " + utcDateTime.format(formatter));
        System.out.println("Local Time: " + localDateTime.format(formatter));
    }
}

import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class TimeZoneConversion {
    public static void main(String[] args) {
        // 示例本地时间字符串
        String localTimeString = "2023-10-05 19:00:00";
        
        // 解析本地时间字符串为ZonedDateTime对象
        ZonedDateTime localDateTime = ZonedDateTime.parse(localTimeString, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.getDefault()));
        
        // 获取UTC时区
        ZoneId utcZoneId = ZoneId.of("UTC");
        
        // 转换为UTC时间
        ZonedDateTime utcDateTime = localDateTime.withZoneSameInstant(utcZoneId);
        
        // 格式化输出
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
        System.out.println("Local Time: " + localDateTime.format(formatter));
        System.out.println("UTC Time: " + utcDateTime.format(formatter));
    }
}