java读取系统和硬件信息_getsystemcpuloadbetweenticks

公司为了方便运维人员部署项目，单独搞了个java的部署以及监控服务器状态的小工具

其中用到了一个三方库，可以读取到系统以及硬件信息（支持各种系统，我在linux和windows都试了是可以的）

了解了下源码就是通过JNA去读取系统信息的

下面是工具中用到的一些方法：

首先引包，一开始引的包在win7可以工作在win10有些接口有问题，然后自己单独引了最新的jna的包

        <dependency>
			<groupId>com.github.oshi</groupId>
			<artifactId>oshi-core</artifactId>
			<version>5.3.6</version>
            <exclusions>
                <exclusion>
                    <artifactId>jna</artifactId>
                    <groupId>net.java.dev.jna</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>jna-platform</artifactId>
                    <groupId>net.java.dev.jna</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna</artifactId>
            <version>5.5.0</version>
        </dependency>
        <dependency>
            <groupId>net.java.dev.jna</groupId>
            <artifactId>jna-platform</artifactId>
            <version>5.5.0</version>
            <exclusions>
                <exclusion>
                    <artifactId>jna</artifactId>
                    <groupId>net.java.dev.jna</groupId>
                </exclusion>
            </exclusions>
        </dependency>

一：读取内存和cpu信息，通过比较内存信息比较准确，cpu有时和任务管理器的优点差异，但差异不会很大

 private static SystemInfo si;
 
    @Scheduled(fixedDelay = 25000)
    public void collectMetrics() throws CreatingSettingsFolderException, ReadingEcosystemException {
        log.info("Collecting Memory Dashboard Information");
        if (si == null){
            si = new SystemInfo();
        }
 
        HardwareAbstractionLayer hal = si.getHardware();
        GlobalMemory memory = hal.getMemory();
        MemoryUsageDto memoryUsageDto = new MemoryUsageDto();
        Date date = new Date();
        memoryUsageDto.setDate(new SimpleDateFormat("HH:mm:ss").format(date));
        memoryUsageDto.setFreeMemory(String.valueOf(memory.getAvailable() / (1024 * 1024)));
        memoryUsageDto.setTotalMemory(String.valueOf(memory.getTotal() / (1024 * 1024)));
        memoryUsageDto.setCpuUsed(cpuUsed(hal));
        memoryUsageQueue.add(memoryUsageDto);
 
        //加到文件中,用于记录历史记录
        MemoryUsageDto saveDto = new MemoryUsageDto();
        BeanUtils.copyProperties(memoryUsageDto,saveDto);
        saveDto.setDate(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));
        fileManager.saveSysInfo(saveDto);
    }
 
    private String cpuUsed(HardwareAbstractionLayer hal){
        //SystemInfo systemInfo = new SystemInfo();
        CentralProcessor processor = hal.getProcessor();
        long[] prevTicks = processor.getSystemCpuLoadTicks();
        Util.sleep(5000);
        long[] ticks = processor.getSystemCpuLoadTicks();
        long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()];
        long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()];
        long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()];
        long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()];
        long cSys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()];
        long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()];
        long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()];
        long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()];
        long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
 
        return new DecimalFormat("#.#").format((totalCpu == 0L ?0:1.0-(idle * 1.0 / totalCpu))*100);
    }

界面展示

二、获取进程和磁盘信息

 /**
     * 获取进程信息
     * @return
     */
    public ProcessInfo[] parseProcesses(String order) {
        if (si == null){
            si = new SystemInfo();
        }
        OperatingSystem os = si.getOperatingSystem();
        List<OSProcess> list = os.getProcesses(0, null);
        long totalMem = si.getHardware().getMemory().getTotal();
        //int cpuCount = si.getHardware().getProcessor().getLogicalProcessorCount();
        // Build a map with a value for each process to control the sort
        Map<OSProcess, Double> processSortValueMap = new HashMap<>();
        for (OSProcess p : list) {
            int pid = p.getProcessID();
            // Ignore the Idle process on Windows
            if (pid > 0 || !SystemInfo.getCurrentPlatformEnum().equals(PlatformEnum.WINDOWS)) {
                // Set up for appropriate sort
                if ("cpu".equals(order)) {
                    processSortValueMap.put(p, p.getProcessCpuLoadBetweenTicks(priorSnapshotMap.get(pid)));
//                } else if (cumulativeCpuButton.isSelected()) {
//                    processSortValueMap.put(p, p.getProcessCpuLoadCumulative());
                } else {
                    processSortValueMap.put(p, (double) p.getResidentSetSize());
                }
            }
        }
        // Now sort the list by the values
        List<Map.Entry<OSProcess, Double>> procList = new ArrayList<>(processSortValueMap.entrySet());
        procList.sort(Map.Entry.comparingByValue());
        // Insert into array in reverse order (lowest sort value last)
        int i = procList.size();
        ProcessInfo[] procArr = new ProcessInfo[i];
        // These are in descending CPU order
        for (Map.Entry<OSProcess, Double> e : procList) {
            OSProcess p = e.getKey();
            // Matches order of COLUMNS field
            i--;
            int pid = p.getProcessID();
            ProcessInfo info = new ProcessInfo();
            info.setPid(pid);
            info.setPpid(p.getParentProcessID());
            info.setThreads(p.getThreadCount());
            info.setCpuPercent(String.format("%.1f",
                    100d * p.getProcessCpuLoadBetweenTicks(priorSnapshotMap.get(pid))));
            //procArr[i][4] = String.format("%.1f", 100d * p.getProcessCpuLoadCumulative());
            //procArr[i][5] = FormatUtil.formatBytes(p.getVirtualSize());
            info.setMemory(FormatUtil.formatBytes(p.getResidentSetSize()));
            info.setMemoryPercent(String.format("%.1f", 100d * p.getResidentSetSize() / totalMem));
            info.setName(p.getName());
            procArr[i] = info;
        }
        // Re-populate snapshot map
        priorSnapshotMap.clear();
        for (OSProcess p : list) {
            priorSnapshotMap.put(p.getProcessID(), p);
        }
        return procArr;
    }
 
 
    public List<DiskInfo> fileInfo() {
        if (si == null){
            si = new SystemInfo();
        }
        FileSystem fileSystem = si.getOperatingSystem().getFileSystem();
        List<OSFileStore> fsArray = fileSystem.getFileStores();
        List<DiskInfo> diskInfos = new ArrayList<>();
        for (OSFileStore fs : fsArray) {
            long usable = fs.getUsableSpace();
            long total = fs.getTotalSpace();
            DiskInfo diskInfo = new DiskInfo();
            diskInfo.setName(fs.getName());
            diskInfo.setType(fs.getType());
            String used = String.format("%s(%.1f%%)",FormatUtil.formatBytes(usable), 100d * usable / total);
            diskInfo.setFree(used);
            diskInfo.setTotal(FormatUtil.formatBytes(fs.getTotalSpace()));
            diskInfos.add(diskInfo);
        }
        return diskInfos;
    }

界面展示

还有很多接口使用方法作者都给了例子和demo

https://github.com/oshi/oshi

这里也把基本使用给展示了

https://www.cnblogs.com/songxingzhu/p/9107878.html