使用Java获取系统信息的常用代码整理总结

import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.util.ArrayList;
import java.util.List;
import mytools.com.sun.management.OperatingSystemMXBean;
import mytools.java.io.File;
import mytools.java.lang.management.ManagementFactory;
/**
 * 获取windows系统信息（CPU,内存,文件系统）
 * @author libing
 *
 */
public class WindowsInfoUtil {
  private static final int CPUTIME = 500;
  private static final int PERCENT = 100;
  private static final int FAULTLENGTH = 10;
  public static void main(String[] args) {
  System.out.println(getCpuRatioForWindows());
  System.out.println(getMemery());
  System.out.println(getDisk());
 }
 //获取内存使用率
 public static String getMemery(){
 OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
 // 总的物理内存+虚拟内存
 long totalvirtualMemory = osmxb.getTotalSwapSpaceSize();
 // 剩余的物理内存
 long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();
 Double compare=(Double)(1-freePhysicalMemorySize*1.0/totalvirtualMemory)*100;
 String str="内存已使用:"+compare.intValue()+"%";
 return str;
 }
 //获取文件系统使用率
 public static List<String> getDisk() {
 // 操作系统
 List<String> list=new ArrayList<String>();
 for (char c = 'A'; c <= 'Z'; c++) {
  String dirName = c + ":/";
  File win = new File(dirName);
     if(win.exists()){
     long total=(long)win.getTotalSpace();
     long free=(long)win.getFreeSpace();
     Double compare=(Double)(1-free*1.0/total)*100;
     String str=c+":盘 已使用 "+compare.intValue()+"%";
     list.add(str);
     }
   }
    return list;
 }
 //获得cpu使用率
 public static String getCpuRatioForWindows() {
     try {
       String procCmd = System.getenv("windir") + "//system32//wbem//wmic.exe process get Caption,CommandLine,KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount";
       // 取进程信息
       long[] c0 = readCpu(Runtime.getRuntime().exec(procCmd));
       Thread.sleep(CPUTIME);
       long[] c1 = readCpu(Runtime.getRuntime().exec(procCmd));
       if (c0 != null && c1 != null) {
         long idletime = c1[0] - c0[0];
         long busytime = c1[1] - c0[1];
         return "CPU使用率:"+Double.valueOf(PERCENT * (busytime)*1.0 / (busytime + idletime)).intValue()+"%";
       } else {
         return "CPU使用率:"+0+"%";
       }
     } catch (Exception ex) {
       ex.printStackTrace();
       return "CPU使用率:"+0+"%";
     }
   }
 //读取cpu相关信息
  private static long[] readCpu(final Process proc) {
    long[] retn = new long[2];
    try {
      proc.getOutputStream().close();
      InputStreamReader ir = new InputStreamReader(proc.getInputStream());
      LineNumberReader input = new LineNumberReader(ir);
      String line = input.readLine();
      if (line == null || line.length() < FAULTLENGTH) {
        return null;
      }
      int capidx = line.indexOf("Caption");
      int cmdidx = line.indexOf("CommandLine");
      int rocidx = line.indexOf("ReadOperationCount");
      int umtidx = line.indexOf("UserModeTime");
      int kmtidx = line.indexOf("KernelModeTime");
      int wocidx = line.indexOf("WriteOperationCount");
      long idletime = 0;
      long kneltime = 0;
      long usertime = 0;
      while ((line = input.readLine()) != null) {
        if (line.length() < wocidx) {
          continue;
        }
        // 字段出现顺序：Caption,CommandLine,KernelModeTime,ReadOperationCount,
        // ThreadCount,UserModeTime,WriteOperation
        String caption =substring(line, capidx, cmdidx - 1).trim();
        String cmd = substring(line, cmdidx, kmtidx - 1).trim();
        if (cmd.indexOf("wmic.exe") >= 0) {
          continue;
        }
        String s1 = substring(line, kmtidx, rocidx - 1).trim();
        String s2 = substring(line, umtidx, wocidx - 1).trim();
        if (caption.equals("System Idle Process") || caption.equals("System")) {
          if (s1.length() > 0)
            idletime += Long.valueOf(s1).longValue();
          if (s2.length() > 0)
            idletime += Long.valueOf(s2).longValue();
          continue;
        }
        if (s1.length() > 0)
          kneltime += Long.valueOf(s1).longValue();
        if (s2.length() > 0)
          usertime += Long.valueOf(s2).longValue();
      }
      retn[0] = idletime;
      retn[1] = kneltime + usertime;
      return retn;
    } catch (Exception ex) {
      ex.printStackTrace();
    } finally {
      try {
        proc.getInputStream().close();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    return null;
  }
  /**
  * 由于String.subString对汉字处理存在问题（把一个汉字视为一个字节)，因此在 包含汉字的字符串时存在隐患，现调整如下：
  * @param src 要截取的字符串
  * @param start_idx 开始坐标（包括该坐标)
  * @param end_idx 截止坐标（包括该坐标）
  * @return
  */
  private static String substring(String src, int start_idx, int end_idx) {
  byte[] b = src.getBytes();
  String tgt = "";
  for (int i = start_idx; i <= end_idx; i++) {
  tgt += (char) b[i];
  }
  return tgt;
 }
}

private static String getIpAddress() throws UnknownHostException { 
    InetAddress address = InetAddress.getLocalHost(); 
 
    return address.getHostAddress(); 
  }

public static String getMACAddress(){ 
 
    String address = ""; 
 
    String os = System.getProperty("os.name"); 
    String osUser=System.getProperty("user.name"); 
    if (os != null && os.startsWith("Windows")) { 
 
      try { 
 
        String command = "cmd.exe /c ipconfig /all"; 
         
        Process p = Runtime.getRuntime().exec(command); 
 
        BufferedReader br =new BufferedReader(new InputStreamReader(p.getInputStream())); 
 
        String line; 
 
        while ((line = br.readLine()) != null) { 
 
          if (line.indexOf("Physical Address") > 0) { 
 
            int index = line.indexOf(":"); 
 
            index += 2; 
 
            address = line.substring(index); 
 
            break; 
 
          } 
 
        } 
 
        br.close(); 
 
        return address.trim(); 
 
      } 
 
      catch (IOException e) { 
      } 
 
    } 
    return address; 
 
  } 

String osUser=System.getProperty("user.name"); 

import java.util.Properties;  
   
Properties props=System.getProperties(); //获得系统属性集  
String osName = props.getProperty("os.name"); //操作系统名称  
String osArch = props.getProperty("os.arch"); //操作系统构架  
String osVersion = props.getProperty("os.version"); //操作系统版本