java 时间格式

前言

   在实际工作中我们会遇到各种时间格式的转换，经常写这个代码比较繁琐，提取一个简单的工具类，节省时间开发更高效

代码案例

/**
 * @Classname FormatTypeEnum
 * @Description 时间格式枚举
 */
public enum FormatTypeEnum {

     year("年","yyyy"),
     year_month("年月","yyyy-MM"),
     month_day("月日","MM-dd"),
     year_month_day("年月日","yyyy-MM-dd"),
     default_type("年月日时分秒","yyyy-MM-dd HH:mm:ss"),
     timeStamp("年月日时分秒毫秒","yyyy-MM-dd HH:mm:ss.SSS");


    private String desc;

    private String pattern;

    FormatTypeEnum(String desc, String pattern) {
        this.desc = desc;
        this.pattern = pattern;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public String getPattern() {
        return pattern;
    }

    public void setPattern(String pattern) {
        this.pattern = pattern;
    }
}


/**
 * @Classname TimeCommonUtils
 * @Description  时间常用工具类
 */
public class TimeCommonUtils {


    /**
     * 字符串转时间戳
     * @param time
     * @param typeEnum
     * @return long
     * @throws ParseException
     */
    public static long getTimeStamp(String time,FormatTypeEnum typeEnum) throws ParseException {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(typeEnum.getPattern());
         return  simpleDateFormat.parse(time).getTime();
    }

    /**
     * 字符串转日期
     * @param time
     * @param typeEnum
     * @return long
     * @throws ParseException
     */
    public static Date getTimeDate(String time, FormatTypeEnum typeEnum) throws ParseException {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(typeEnum.getPattern());
        return simpleDateFormat.parse(time);
    }

    /**
     * 日期转对应字符串
     * @param time
     * @param typeEnum
     * @return long
     * @throws ParseException
     */
    public static String  getTimeDate(Date time, FormatTypeEnum typeEnum) throws ParseException {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(typeEnum.getPattern());
        return simpleDateFormat.format(time);
    }

     /**
     * 时间戳转对应字符串
     * @param time
     * @param typeEnum
     * @return long
     * @throws ParseException
     */
    public static String  getTimeOfLong(Long time, FormatTypeEnum typeEnum) throws ParseException {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(typeEnum.getPattern());
        return simpleDateFormat.format(new Date(time));
    }
}

================例子===========
public static void main(String[] args) throws ParseException {

        System.out.println(TimeCommonUtils.getTimeDate("2020-01-01 15:28:40", FormatTypeEnum.default_type));
        System.out.println(TimeCommonUtils.getTimeDate(new Date(), FormatTypeEnum.default_type));
        System.out.println(TimeCommonUtils.getTimeOfLong(new Date().getTime(), FormatTypeEnum.timeStamp));

    }

效果