字符串格式化

String.format 格式化

import java.time.LocalDate;

/**
 * @Author yanyg
 * @Date 2020/7/9 9:40
 * @Descripetion admin
 */
public class TestStringFormat {
    public static void main(String[] args) {
        LocalDate localDate = LocalDate.now();
        int year = localDate.getYear();
        int month = localDate.getMonth().getValue();
        int dayOfMonth = localDate.getDayOfMonth();
        // month 格式化为至少2位十进制整数
        // dayOfMonth 格式化为至少2位十进制整数
        String orderCreateTime = year + "-" + String.format("%02d", month) + "-" + String.format("%02d", dayOfMonth);
        // 2020-07-09
        System.out.println(orderCreateTime);

    }
}