java程序獲取windows內存佔用（MB）|CPU使用率|啓動命令|進程ID|進程名稱
public class App {
// 可以設置長些，防止讀到運行此次系統檢查時的cpu佔用率，就不準了
private static final int CPUTIME = 5000;
private static final int MB = 1024 * 1024;
public static void main(String[] args) throws IOException, InterruptedException {
// Thread.sleep(30000);
MonitorInfoBean monitorInfo = getMonitorInfoBean();
List<PerfRawData> perfRawDataList = getCpuUsage();
List<ProcessCmdLine> processCmdLineList = getProcessCmdLineList();
for (MonitorInfoBean.ProcessDetail processDetail : monitorInfo.getProcessDetailList()) {
PerfRawData perfRawData = perfRawDataList.stream().filter(d -> d.getPid() == processDetail.getPid()).findFirst().orElse(null);
if (perfRawData == null) {
processDetail.setCpuRatio(0);
} else {
processDetail.setCpuRatio(perfRawData.getCpuRatio());
}
ProcessCmdLine processCmdLine = processCmdLineList.stream().filter(d -> d.getPid() == processDetail.getPid()).findFirst().orElse(null);
if (processCmdLine != null) {
processDetail.setCmdLine(processCmdLine.getCmdLine());
}
}
monitorInfo.getProcessDetailList().sort(Comparator.comparing(MonitorInfoBean.ProcessDetail::getCpuRatio).reversed());
System.out.println("時間|進程ID|進程名稱|內存佔用（MB）|CPU使用率|啓動命令");
for (MonitorInfoBean.ProcessDetail processDetail : monitorInfo.getProcessDetailList()) {
System.out.println(String.format("%s|%s|%s|%s|%s|%s"
, DateFormat.getDateTimeInstance().format(processDetail.time)
, processDetail.pid
, processDetail.pName
, processDetail.memUsage / 1024
, new DecimalFormat("######0.00").format(processDetail.cpuRatio)
, processDetail.cmdLine));
}
}
/**
* 獲得當前的監控對象
*/
private static MonitorInfoBean getMonitorInfoBean() throws IOException {
OperatingSystemMXBean operatingSystemMXBean = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
MonitorInfoBean infoBean = new MonitorInfoBean();
infoBean.setOsName(System.getProperty("os.name"));
infoBean.setTotalMemorySize(operatingSystemMXBean.getTotalPhysicalMemorySize() / MB);
infoBean.setFreePhysicalMemorySize(operatingSystemMXBean.getFreePhysicalMemorySize() / MB);
infoBean.setUsedMemory(infoBean.getTotalMemorySize() - infoBean.getFreePhysicalMemorySize());
List<String> cmdResult = execCmd("cmd.exe /c tasklist");
List<MonitorInfoBean.ProcessDetail> processDetailList = new ArrayList<>();
String line;
for (int i = 0; i < cmdResult.size(); i++) {
if (i <= 2 || StringUtils.isEmpty(cmdResult.get(i))) {
continue;
}
line = cmdResult.get(i);
if (line.length() > 0) {
MonitorInfoBean.ProcessDetail processDetail = new MonitorInfoBean.ProcessDetail();
processDetail.setTime(new Date());
processDetail.setPName(line.substring(0, 29).trim());
line = line.substring(29).trim();
line = line.replaceAll("\\s+", " ");
String[] lineArr = line.split(" ");
processDetail.setPid(Integer.parseInt(lineArr[0]));
processDetail.setMemUsage(Integer.parseInt(lineArr[3].replaceAll(",", "")));
processDetailList.add(processDetail);
}
}
infoBean.setProcessDetailList(processDetailList);
return infoBean;
}
/**
* 計算CPU使用率
*/
private static List<PerfRawData> getCpuUsage() throws IOException, InterruptedException {
List<PerfRawData> perfRawDataList1 = getPerfRawDataList();
Thread.sleep(CPUTIME);
List<PerfRawData> perfRawDataList2 = getPerfRawDataList();
for (PerfRawData perfRawData1 : perfRawDataList1) {
PerfRawData perfRawData2 = perfRawDataList2.stream().filter(d -> d.getPid() == perfRawData1.getPid()).findFirst().orElse(null);
if (perfRawData2 == null) {
perfRawData1.setCpuRatio(0);
continue;
}
long n1 = perfRawData1.getPercentProcessorTime();
long n2 = perfRawData2.getPercentProcessorTime();
long d1 = perfRawData1.getTimestamp_Sys100NS();
long d2 = perfRawData2.getTimestamp_Sys100NS();
perfRawData1.setCpuRatio(((double) (n2 - n1) / (d2 - d1)) * 100);
}
return perfRawDataList1;
}
private static List<PerfRawData> getPerfRawDataList() throws IOException {
List<PerfRawData> perfRawDataList = new ArrayList<>();
String command = "powershell.exe Get-WmiObject -Class Win32_PerfRawData_PerfProc_Process IDProcess,Name,PercentProcessorTime,TimeStamp_Sys100NS";
List<String> cmdResult = execCmd(command);
PerfRawData perfRawData = new PerfRawData();
for (String s : cmdResult) {
if (StringUtils.isEmpty(s)) {
if (perfRawData.getPid() > 0) {
perfRawDataList.add(perfRawData);
perfRawData = new PerfRawData();
}
continue;
}
String[] sArr = s.split(":");
if (s.contains("IDProcess")) {
perfRawData.setPid(Integer.parseInt(sArr[1].trim()));
} else if (s.contains("Name :")) {
perfRawData.setPName(sArr[1].trim());
} else if (s.contains("PercentProcessorTime")) {
perfRawData.setPercentProcessorTime(Long.parseLong(sArr[1].trim()));
} else if (s.contains("Timestamp_Sys100NS")) {
perfRawData.setTimestamp_Sys100NS(Long.parseLong(sArr[1].trim()));
}
}
return perfRawDataList;
}
private static List<ProcessCmdLine> getProcessCmdLineList() throws IOException {
List<ProcessCmdLine> processCmdLineList = new ArrayList<>();
String command = "powershell.exe wmic process get processID,caption,commandline /value";
List<String> cmdResult = execCmd(command);
ProcessCmdLine processCmdLine = new ProcessCmdLine();
for (String s : cmdResult) {
if (StringUtils.isEmpty(s)) {
if (processCmdLine.getPid() > 0 && StringUtils.hasText(processCmdLine.getCmdLine())) {
processCmdLineList.add(processCmdLine);
processCmdLine = new ProcessCmdLine();
}
continue;
}
String[] sArr = s.split("=");
if (s.contains("CommandLine")) {
processCmdLine.setCmdLine(sArr.length == 2 ? sArr[1].trim() : "empty");
} else if (s.contains("ProcessId")) {
processCmdLine.setPid(Integer.parseInt(sArr[1].trim()));
}
}
return processCmdLineList;
}
/**
* 執行cmd命令，按行返回執行結果
*
* @param command cmd命令
* @return 按行返回執行結果
* @throws IOException
*/
private static List<String> execCmd(String command) throws IOException {
Process powerShellProcess = Runtime.getRuntime().exec(command);
powerShellProcess.getOutputStream().close();
List<String> lineList = new ArrayList<>();
String line;
BufferedReader stdout = new BufferedReader(new InputStreamReader(powerShellProcess.getInputStream()));
while ((line = stdout.readLine()) != null) {
lineList.add(line);
}
stdout.close();
return lineList;
}
@Data
public static class MonitorInfoBean {
// 操作系統(MB)
private String osName;
// 總的物理內存(MB)
private long totalMemorySize;
// 剩餘的物理內存(MB)
private long freePhysicalMemorySize;
// 已使用的物理內存(MB)
private long usedMemory;
private List<ProcessDetail> processDetailList;
@Data
public static class ProcessDetail {
private Date time;
private String pName;
private int pid;
// 佔用內存（KB）
private int memUsage;
// CPU使用率（百分比）
private double cpuRatio;
private String cmdLine;
}
}
@Data
public static class PerfRawData {
private int pid;
private String pName;
private long PercentProcessorTime;
private long Timestamp_Sys100NS;
/**
* CPU使用率百分比*100
*/
private double cpuRatio;
}
@Data
public static class ProcessCmdLine {
private int pid;
private String cmdLine;
}
}
打印結果爲：
時間|進程ID|進程名稱|內存佔用（MB）|CPU使用率|啓動命令
2021-7-13 17:48:50|14752|java.exe|30|8.93|empty
2021-7-13 17:48:50|4472|Memory Compression|1218|4.36|empty
2021-7-13 17:48:50|12164|idea64.exe|2569|3.57|"D:\Program Files\JetBrains\IntelliJ IDEA 2020.1.2\bin\idea64.exe"
2021-7-13 17:48:50|2296|ekrn.exe|146|2.18|empty
2021-7-13 17:48:50|4|System|0|1.79|empty
2021-7-13 17:48:50|6176|softmon.exe|8|1.59|empty
2021-7-13 17:48:50|6940|svchost.exe|24|1.39|C:\Windows\system32\svchost.exe -k UnistackSvcGroup
2021-7-13 17:48:50|1248|dwm.exe|150|1.19|empty
2021-7-13 17:48:50|792|csrss.exe|5|0.99|empty
2021-7-13 17:48:50|7136|WmiPrvSE.exe|21|0.60|empty
2021-7-13 17:48:50|564|svchost.exe|23|0.40|empty
2021-7-13 17:48:50|5796|tmcsvc.exe|6|0.40|empty
2021-7-13 17:48:50|6700|CGESA.exe|9|0.40|empty