Java日期转换为字符串和返回日期，不能进行相等性检查

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateToStringExample {
    public static void main(String[] args) {
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateString = sdf.format(date);
        System.out.println(dateString);
    }
}

2022-01-01 12:34:56

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class StringToDateExample {
    public static void main(String[] args) {
        String dateString = "2022-01-01 12:34:56";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date date = sdf.parse(dateString);
            System.out.println(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}

Sat Jan 01 12:34:56 GMT 2022