Java时间

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时间工具

joda-time

判断当前时间是否处在某个区间（用字符串表示的两个时间点）

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<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.3.1</version>
    <type>jar</type>
</dependency>
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/**
  * 判断当前时间是否处在某个区间（用字符串表示的两个时间点）
  * https://www.programcreek.com/java-api-examples/?class=org.apache.commons.lang.time.DateUtils&method=parseDate
  * org.apache.commons.lang.time.DateUtils.parseDate
  *
  * @return
  */
public static boolean isNowSuitable() {
    String startTime = "2019-01-12";
    String endTime = "2019-08-12";
    if (StringUtils.isEmpty(startTime) || StringUtils.isEmpty(endTime)) {
        return false;
    }

    try {
        String[] parsePatterns = {"yyyy-MM-dd"}; // "yyyy-MM-dd HH:mm:ss"
        Date startDate = DateUtils.parseDate(startTime, parsePatterns);
        Date endDate = DateUtils.parseDate(endTime, parsePatterns);
        long now = Calendar.getInstance().getTimeInMillis();
        if (now >= startDate.getTime() && now <= endDate.getTime()) {
            return true;
        }

    } catch (ParseException e) {
        e.printStackTrace();
    }
    return false;
}

iso 时间转换

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import com.alibaba.fastjson.annotation.JSONField;
import com.alibaba.fastjson.serializer.SerializerFeature;

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

/**
 * <p>类的详细说明</p>
 *
 * @author lyloou
 * @author 其他作者姓名
 * @version 1.00 2020/10/30 , 星期五 lyloou 创建
 * <p>1.01 YYYY/MM/DD 修改者姓名 修改内容说明</p>
 */
public class A {
    public static void main(String[] args) throws Exception {
        new A().test();
    }

    public static String toISO8601UTC(Date date) {
        TimeZone tz = TimeZone.getTimeZone("UTC");
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        df.setTimeZone(tz);
        return df.format(date);
    }

    public static Date fromISO8601UTC(String dateStr) {
        TimeZone tz = TimeZone.getTimeZone("UTC");
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        df.setTimeZone(tz);

        try {
            return df.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }

        return null;
    }

    public void test() {
        String input = "2020-11-05T16:00:00.000Z"; // 对应的日期时间是：Fri Nov 06 00:00:00 CST 2020
        Date date = fromISO8601UTC(input);
        System.out.println(date);
        DateFormat df1 = new SimpleDateFormat("yyyy-MM-dd");
        System.out.println(df1.format(date));

        Model model = new Model();
        model.startTime = date;
        String data = com.alibaba.fastjson.JSON.toJSONStringWithDateFormat(model, "yyyy-MM-dd", SerializerFeature.DisableCircularReferenceDetect);
        System.out.println(data);
    }

    public static class Model {
        @JSONField(format = "yyyy-MM-dd hh:mm")
        public Date startTime;

        @JSONField(format = "yyyy-MM-dd")
        public Date endTime;

        @Override
        public String toString() {
            return "Model{" +
                    "startTime=" + startTime +
                    ", endTime=" + endTime +
                    '}';
        }
    }
}