LocalDateTime 当前时间转yyyy-MM-dd HH:mm:ss字符串

以下是将当前时间转换为yyyy-MM-dd HH:mm:ss字符串的Java代码：

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Main {
    public static void main(String[] args) {
        LocalDateTime now = LocalDateTime.now();
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        String formattedDateTime = now.format(formatter);
        System.out.println("Current time: " + formattedDateTime);
    }
}

输出结果为：

Current time: 2022-08-23 16:30:45