通过解析df命令内容实现， 获取以下信息:
[root@localhost ~]# dfFilesystem 1K-blocks Used Available Use% Mounted ondevtmpfs 16324812 0 16324812 0% /devtmpfs 16342248 0 16342248 0% /dev/shmtmpfs 16342248 271464 16070784 2% /runtmpfs 16342248 0 16342248 0% /sys/fs/cgroup/dev/sda3 451151536 201744672 226419856 48% //dev/sda1 999320 169864 760644 19% /boottmpfs 3268448 0 3268448 0% /run/user/0实现代码:
import lombok.Data;import lombok.extern.slf4j.Slf4j;import org.apache.commons.io.IOUtils;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.nio.charset.StandardCharsets;import java.util.ArrayList;import java.util.List;@Slf4jpublic class DiskUtils { @Data public static class Df { private String filesystem; private String blocks; /** 已应用 */ private long used; /** 残余可用 */ private long available; /** 已使用率， 0-100的整数值 */ private int useRate; /** 挂载目录， '/'示意挂载在根目录 */ private String mountedOn; } public static Df df(String dir) { switch (OS.platform()) { case WINDOWS: Df df = new Df(); df.setAvailable(Long.MAX_VALUE); return df; } Process process; try { log.debug("df " + dir); process = Runtime.getRuntime().exec("df " + dir); InputStream inputStream = process.getInputStream(); // Filesystem 1K-blocks Used Available Use% Mounted on // /dev/sdc 5814186096 5814169712 0 100% /home/spy-sd/sdc List<String> lines = IOUtils.readLines(inputStream, StandardCharsets.UTF_8); List<String> titles = getTitles(lines.get(0)); String[] values = lines.get(1).split("\\s+"); Df df = new Df(); for(int i = 0; i < titles.size(); i ++) { String title = titles.get(i); switch (title.toLowerCase()) { case "filesystem": df.setFilesystem(values[i]);break; case "1k-blocks": df.setBlocks(values[i]);break; case "used": df.setUsed(Long.parseLong(values[i]));break; case "available": df.setAvailable(Long.parseLong(values[i]));break; case "use%": df.setUseRate(Integer.parseInt(values[i].replace("%", "")));break; case "mountedon": df.setMountedOn(values[i]);break; } } return df; } catch (IOException e) { e.printStackTrace(); return null; } } private static List<String> getTitles(String titlesLine) { List<String> titles = new ArrayList<>(); String[] titleArray = titlesLine.split("\\s+"); for(String title: titleArray) { if(title.equalsIgnoreCase("on")) { if(!titles.isEmpty()) { int lastIdx = titles.size() - 1; titles.set(lastIdx, titles.get(lastIdx) + "On"); } } else { titles.add(title); } } return titles; } public static void main(String[] args) { Df df = df(new File("/home/spy-sd/sdc").getAbsolutePath()); log.debug("df={}", df); }}Df数据示例：
DiskUtils.Df(filesystem=/dev/sdc, blocks=5814186096, used=1652962708, available=3868180876, useRate=30, mountedOn=/home/spy-sd/sdc)