UnitsUtils.java

/*
 * Copyright 2016. SHENQINCI(沈钦赐)<946736079@qq.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ren.qinc.markdowneditors.utils;

import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * 单位转换
 * Created by 沈钦赐 on 16/1/30.
 */
public class UnitsUtils {
    private final static ThreadLocal<SimpleDateFormat> dateFormater2 = new ThreadLocal<SimpleDateFormat>() {
        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("MM-dd");
        }
    };
    private final static ThreadLocal<SimpleDateFormat> dateFormater3 = new ThreadLocal<SimpleDateFormat>() {
        @Override
        protected SimpleDateFormat initialValue() {
            return new SimpleDateFormat("yyyy-MM-dd");
        }
    };

    /**
     * 时间转换成中文
     *
     * @param time the time
     * @return the string
     */
    public static String friendlyTime(Date time) {

        if (time == null) {
            return "Unknown";
        }
        String ftime = "";
        Calendar cal = Calendar.getInstance();

        // 判断是否是同一天
        String curDate = dateFormater2.get().format(cal.getTime());
        String paramDate = dateFormater2.get().format(time);
        if (curDate.equals(paramDate)) {
            int inter = (int) (cal.getTimeInMillis() - time.getTime()) / 60000;
            int hour = inter / 60;
            if (inter == 0) {
                ftime = "刚刚";
            } else if (hour == 0)
                ftime = Math.max((cal.getTimeInMillis() - time.getTime()) / 60000, 1) + "分钟前";
            else
                ftime = hour + "小时前";
            return ftime;
        }

        long lt = time.getTime() / 86400000;
        long ct = cal.getTimeInMillis() / 86400000;
        int days = (int) (ct - lt);
        if (days == 0) {
            int hour = (int) ((cal.getTimeInMillis() - time.getTime()) / 3600000);
            if (hour == 0)
                ftime = Math.max((cal.getTimeInMillis() - time.getTime()) / 60000, 1) + "分钟前";
            else
                ftime = hour + "小时前";
        } else if (days == 1) {
            ftime = "昨天";
        } else if (days == 2) {
            ftime = "前天";
        } else if (days > 2 && days < 31) {
            ftime = days + "天前";
        } else if (days < 365) {
            ftime = dateFormater2.get().format(time);
        }
//        else if (days >= 31 && days <= 2 * 31) {
//            ftime = "一个月前";
//        } else if (days > 2 * 31 && days <= 3 * 31) {
//            ftime = "2个月前";
//        } else if (days > 3 * 31 && days <= 4 * 31) {
//            ftime = "3个月前";
//        }
        else {
            ftime = dateFormater3.get().format(time);
        }
        return ftime;
    }


    /**
     * 格式化内存单位
     *
     * @param size 大小
     * @return
     */
    public static String getFormatSize(double size) {
        double kiloByte = size / 1024;
        if (kiloByte < 1) {
            return size + "Byte";
        }

        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
        }

        double teraBytes = gigaByte / 1024;
        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
    }
}