/**
 * 系统基础信息
 *
 * @author baiyan
 */
@ApiModel("系统基础信息")
@Data
public class SystemInfoBaseDTO {
​
    @ApiModelProperty("总量")
    private Double total;
​
    @ApiModelProperty("使用")
    private Double used;
​
    @ApiModelProperty("空闲")
    private Double free;
​
    @ApiModelProperty("使用率")
    private Double usedRate;
​
}

String menCommand = "ssh root@1.2.3.4 -p 22 df -h /|sed -n "2,1p" |awk '{print $2" "$3}'";
String memInfo = CmdUtil.executeLinuxCmd(menCommand);
String[] mem = memInfo.split(" ");
Double total = this.getNumber(mem[0]);
Double used = this.getNumber(mem[1]);

/**
 * 磁盘信息获取
 */
private SystemInfoBaseDTO getBaseInfo(String command){
    SystemInfoBaseDTO info = new SystemInfoBaseDTO();
    String menCommand = "ssh root@1.2.3.4 -p 22 df -h /|sed -n "2,1p" |awk '{print $2" "$3}'";
    String memInfo = CmdUtil.executeLinuxCmd(menCommand);
    String[] mem = memInfo.split(" ");
    Double total = this.getNumber(mem[0]);
    Double used = this.getNumber(mem[1]);
    info.setTotal(total);
    info.setUsed(used);
    info.setFree(total - used);
    info.setUsedRate((double) Math.round(used/total * 10000)/100);
    return info;
}

public class CmdUtil {
​
    /**
     * 执行命令
     *
     * 默认情况下在当前环境执行，即当前如果为docker部署则需要在docker中ssh拨至宿主机执行
     *
     * @param cmd
     * @return
     */
    public static String executeLinuxCmd(String cmd){
        String[] cmdArray = {"sh", "-c", cmd};
        return executeShell(true, cmdArray);
    }
​
    /**
     * 执行命令
     *
     * @param withLine: 多行时是否换行
     * @param cmd: 执行指令 第一个参数是可执行命令程序，其他的是命令行执行是需要的参数
     * @return: java.lang.String
     **/
    public static String executeShell(boolean withLine, String... cmd){
        return executeShell(null, withLine, cmd);
    }
​
    /**
     * 执行shell
     *
     * @param filePath: 默认值是当前进程的当前工作目录，通常根据系统属性 user.dir 来命名
     * @param withLine: 
     * @param cmd: 
     * @return: java.lang.String
     **/
    public static String executeShell(File filePath, boolean withLine, String... cmd){
        StringBuilder cmdResult = new StringBuilder();
        try {
            ProcessBuilder processBuilder = new ProcessBuilder(cmd);
            processBuilder.directory(filePath);
            Process process = processBuilder.redirectErrorStream(true).start();
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))){
                String line;
​
                while ((line = reader.readLine()) != null){
                    cmdResult.append(line);
                    if (withLine){
                        cmdResult.append(System.lineSeparator());
                    }
                }
                log.debug(cmdResult.toString());
            }
            int existCode = process.waitFor();
            log.debug("execute cmd {} success, exist code {}", Arrays.toString(cmd), existCode);
        } catch (Exception e){
            log.error(e.getMessage(),e);
        }
        if (withLine){
            return cmdResult.substring(0, cmdResult.length()).trim();
        }
        return cmdResult.toString().trim();
    }
​
}