标签:时间 mini form created 格式 menu gets com utils
package com.example.administrator.filemanager.utils;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* Created by Administrator on 2016/12/29.
*/
public class CommonUtils {
//DecimalFormat:用于格式化十进制的数字
private static DecimalFormat df = new DecimalFormat("#.00");
/**
* 单位换算,单位:B
*/
public static String getFileSize(long filename){
StringBuffer buffer = new StringBuffer();
if (filename<1024){//小于1KB 1kb = 1024b
buffer.append(filename);
buffer.append("B");
}else if (filename< 1048576 ){//小于 1M 1M = 1024*1024 b
buffer.append(df.format((double) filename/1024));
buffer.append("K");
}else if(filename< 1073741824){//小于 1G 1G = 1024*1024*1024 b
buffer.append(df.format((double) filename/1048576));
buffer.append("M");
}else{//大于 1G 1G = 1024*1024*1024 b
buffer.append(df.format((double) filename/1073741824));
buffer.append("G");
}
return buffer.toString();
}
/**
* 获取时间
*/
public static String getStrTime(long filename){
if (filename==0){
return "未知";
}
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String str = format.format(new Date(filename));
return str;
}
}
单位换算(格式化十进制数-B),获取时间工具类CommenUtil
标签:时间 mini form created 格式 menu gets com utils
原文地址:http://www.cnblogs.com/ll-ouyang/p/6247396.html