Systemenv

package com.xxx.test;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.nio.charset.Charset;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.SortedMap;
import java.util.StringTokenizer;
import java.util.TreeMap;
import sun.management.ManagementFactory;

import com.sun.management.OperatingSystemMXBean;

public class test 
{
	static HashMap <String, String> hm = new HashMap<String, String>();

	static
	{
		hm.put("java.version", "Java 运行时环境版本");
		hm.put("java.vendor","Java 运行时环境供应商");
		hm.put("java.vendor.url","Java 供应商的 URL");
		hm.put("java.home","Java 安装目录");
		hm.put("java.vm.specification.version","Java 虚拟机规范版本");
		hm.put("java.vm.specification.vendor","Java 虚拟机规范供应商");
		hm.put("java.vm.specification.name","Java 虚拟机规范名称");
		hm.put("java.vm.version","Java 虚拟机实现版本");
		hm.put("java.vm.vendor","Java 虚拟机实现供应商");
		hm.put("java.vm.name","Java 虚拟机实现名称");
		hm.put("java.specification.version","Java 运行时环境规范版本");
		hm.put("java.specification.vendor","Java 运行时环境规范供应商");
		hm.put("java.specification.name","Java 运行时环境规范名称");
		hm.put("java.class.version","Java 类格式版本号");
		hm.put("java.class.path","Java 类路径");
		hm.put("java.library.path","加载库时搜索的路径列表");
		hm.put("java.io.tmpdir","默认的临时文件路径");
		hm.put("java.compiler","要使用的 JIT 编译器的名称");
		hm.put("java.ext.dirs","一个或多个扩展目录的路径");
		hm.put("os.name","操作系统的名称");
		hm.put("os.arch","操作系统的架构");
		hm.put("os.version","操作系统的版本");
		hm.put("file.separator","文件分隔符（在 UNIX 系统中是“/”）");
		hm.put("path.separator","路径分隔符（在 UNIX 系统中是“:”）");
		hm.put("line.separator","行分隔符（在 UNIX 系统中是“/n”）");
		hm.put("user.name","用户的账户名称");
		hm.put("user.home","用户的主目录");
		hm.put("user.dir","用户的当前工作目录");
	}

	public static String getSystemEnv(String str)
	{
		return System.getProperty(str);
	}

	public static void main(String[] args)
	{
        System.out.println(SystemInfo());
        //SystemInfo4Html();

        OSBean();
	}

	public static void OSBean()
	{
        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();

		// 总的物理内存
        long totalMemorySize = osmxb.getTotalPhysicalMemorySize();
        // 剩余的物理内存
        long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();
        // 已使用的物理内存
        long usedMemory = totalMemorySize - freePhysicalMemorySize;

        ThreadGroup parentThread;
        for (parentThread = Thread.currentThread().getThreadGroup(); 
        		parentThread.getParent() != null; 
        			parentThread = parentThread.getParent());

        int totalThread = parentThread.activeCount();

        double cpuRatio = 0;
        String osName = System.getProperty("os.name");
        if (osName.toLowerCase().startsWith("windows")) 
        {
            cpuRatio = getCpuRatioForWindows();
        }
        else 
        {
        	cpuRatio = getCpuRateForLinux();
        }
        System.out.println("totalMemorySize=" + toMb(totalMemorySize) + "MB");
        System.out.println("freePhysicalMemorySize=" + toMb(freePhysicalMemorySize) + "MB");
        System.out.println("usedMemory=" + toMb(usedMemory) + "MB");
        System.out.println("totalThread=" + totalThread);
        System.out.println("cpuRatio=" + cpuRatio);
	}
	public static String SystemInfo4Html()
	{
		StringBuffer sb = new StringBuffer();
		sb.append("[\"").append("<span style='color:red;'>运行环境:</span>\",\"\"],\n");
		sb.append("[\"").append("虚拟机可用处理器的数目\",\"").append(Runtime.getRuntime().availableProcessors()).append("\"],\n");
        sb.append("[\"").append("虚拟机空闲内存量\",\"").append(toMb(Runtime.getRuntime().freeMemory()) + "Mb").append("\"],\n");
        sb.append("[\"").append("虚拟机试图使用的最大内存\",\"").append(toMb(Runtime.getRuntime().maxMemory()) + "Mb").append("\"],\n");
        sb.append("[\"").append("虚拟机中的内存总量\",\"").append(toMb(Runtime.getRuntime().totalMemory()) + "Mb").append("\"],\n");

		sb.append("[\"").append("<span style='color:red;'>系统属性:</span>\",\"\"],\n");
		sb.append(systemProperties(true));

		sb.append("[\"").append("<span style='color:red;'>环境变量:</span>\",\"\"],\n");
		for (Map.Entry entry: System.getenv().entrySet()) 
	    {
			sb.append("[\"").append(entry.getKey()).append("\",\"").append(entry.getValue().toString().replaceAll("\\\\", "\\\\\\\\")).append("\"],\n");
		}
		String str = sb.substring(0, sb.lastIndexOf(","));
		//System.out.println(str);
		return str;
	}
	public static String SystemInfo()
	{
		StringBuffer sb = new StringBuffer();
        sb.append("系统属性:\n");
        sb.append(systemProperties());        
        sb.append("===============================================\n");

        sb.append("虚拟机可用处理器的数目 = " + Runtime.getRuntime().availableProcessors()).append("\n");
        sb.append("虚拟机空闲内存量 = " + toMb(Runtime.getRuntime().freeMemory()) + "Mb").append("\n");
        sb.append("虚拟机试图使用的最大内存量 = " + toMb(Runtime.getRuntime().maxMemory()) + "Mb").append("\n");
        sb.append("虚拟机中的内存总量 = " + toMb(Runtime.getRuntime().totalMemory()) + "Mb").append("\n");

        sb.append("================================================\n");
        sb.append("环境变量:\n");
        for (Map.Entry entry: System.getenv().entrySet()) 
        {
        	sb.append(entry.getKey() + " = " + entry.getValue()).append("\n");
        }	

        sb.append("================================================\n");
        sb.append("可用字符集：\n");
        sb.append(getCharsets());
		return sb.toString();
	}
	public static String getSystemInfo()
	{
		OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
		// 总的物理内存
        long totalMemorySize = osmxb.getTotalPhysicalMemorySize();
        // 剩余的物理内存
        long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();
        // 已使用的物理内存
        long usedMemory = totalMemorySize - freePhysicalMemorySize;
        ThreadGroup parentThread;
        for (parentThread = Thread.currentThread().getThreadGroup(); 
        		parentThread.getParent() != null; 
        			parentThread = parentThread.getParent());

        int totalThread = parentThread.activeCount();

		return "virtual_cpu_num:" + Runtime.getRuntime().availableProcessors() + "," +
			   "virtual_mem_free:\"" + toMb(Runtime.getRuntime().freeMemory()) + "Mb\"," + 
			   "virtual_mem_max:\"" + toMb(Runtime.getRuntime().maxMemory()) + "Mb\"," +
			   "virtual_mem_total:\"" + toMb(Runtime.getRuntime().totalMemory()) + "Mb\"," +

			   "totalMemorySize:\"" + toMb(totalMemorySize) + "MB\"," +
			   "freePhysicalMemorySize:\"" + toMb(freePhysicalMemorySize) + "MB\"," +
			   "usedMemory:\"" + toMb(usedMemory) + "MB\"," +
			   "totalThread:" + totalThread;

	}
	private static double toMb(long mem)
	{
		return (double)(mem/1024/1024);
	}
	public static <K, V> String getCharsets()
	{
		StringBuffer sb = new StringBuffer();
		SortedMap <String, Charset> sm = java.nio.charset.Charset.availableCharsets();
		Iterator <String> itr = sm.keySet().iterator();
		while (itr.hasNext())
        {
            String key = itr.next();
            Set <String> value = sm.get(key).aliases();

            sb.append(key).append(" = ").append(value.toString()).append("\n");
        }
        return sb.toString();
	}

	public static <K, V> String systemProperties() 
	{
		return systemProperties(false);
	}
	@SuppressWarnings("unchecked")
    public static <K, V> String systemProperties(boolean bArray) 
	{
		StringBuffer sb = new StringBuffer();
        Properties p = System.getProperties();
        TreeMap<K, V> map = new TreeMap<K, V>();
        map.putAll((Map<? extends K, ? extends V>) p);
        Iterator itr = map.keySet().iterator();
        while (itr.hasNext())
        {
            String key = (String) itr.next();
            String value = (String) map.get(key);
            if (bArray)
            {
            	if (key.equals("line.separator")) continue;
            	sb.append("[\"").append(key).append("\",\"").append(value.replaceAll("\\\\", "\\\\\\\\")).append("\"],\n");
            }
            else
            {
            	sb.append(key).append(" = ").append(value).append("\n");
            }
        }
        return sb.toString();
    }

	public static String systemProperties_()
	{
		StringBuffer sb = new StringBuffer();
		Properties ps = System.getProperties();
        Enumeration <?> pn = ps.propertyNames();

        while(pn.hasMoreElements())
        {
        	String pName = (String)pn.nextElement();
            String pValue = ps.getProperty(pName);
            sb.append(pName + " = " + pValue).append("\n");
        }
        return sb.toString();
	}


	private static double getCpuRateForLinux(){
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader brStat = null;
        StringTokenizer tokenStat = null;
        try{
            System.out.println("Get usage rate of CUP , linux version: " + linuxVersion);

            Process process = Runtime.getRuntime().exec("top -b -n 1");
            is = process.getInputStream();                    
            isr = new InputStreamReader(is);
            brStat = new BufferedReader(isr);

            if(linuxVersion.equals("2.4")){
                brStat.readLine();
                brStat.readLine();
                brStat.readLine();
                brStat.readLine();

                tokenStat = new StringTokenizer(brStat.readLine());
                tokenStat.nextToken();
                tokenStat.nextToken();
                String user = tokenStat.nextToken();
                tokenStat.nextToken();
                String system = tokenStat.nextToken();
                tokenStat.nextToken();
                String nice = tokenStat.nextToken();

                System.out.println(user+" , "+system+" , "+nice);

                user = user.substring(0,user.indexOf("%"));
                system = system.substring(0,system.indexOf("%"));
                nice = nice.substring(0,nice.indexOf("%"));

                float userUsage = new Float(user).floatValue();
                float systemUsage = new Float(system).floatValue();
                float niceUsage = new Float(nice).floatValue();

                return (userUsage+systemUsage+niceUsage)/100;
            }else{
                brStat.readLine();
                brStat.readLine();

                tokenStat = new StringTokenizer(brStat.readLine());
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                String cpuUsage = tokenStat.nextToken();


                System.out.println("CPU idle : "+cpuUsage);
                Float usage = new Float(cpuUsage.substring(0,cpuUsage.indexOf("%")));

                return (1-usage.floatValue()/100);
            }


        } catch(IOException ioe){
            System.out.println(ioe.getMessage());
            freeResource(is, isr, brStat);
            return 1;
        } finally{
            freeResource(is, isr, brStat);
        }

    }
    private static void freeResource(InputStream is, InputStreamReader isr, BufferedReader br){
        try{
            if(is!=null)
                is.close();
            if(isr!=null)
                isr.close();
            if(br!=null)
                br.close();
        }catch(IOException ioe){
            System.out.println(ioe.getMessage());
        }
    }

    private static double 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 Double.valueOf(
                        PERCENT * (busytime) / (busytime + idletime))
                        .doubleValue();
            } else {
                return 0.0;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            return 0.0;
        }
    }

    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 = Bytes.substring(line, capidx, cmdidx - 1)
                        .trim();
                String cmd = Bytes.substring(line, cmdidx, kmtidx - 1).trim();
                if (cmd.indexOf("wmic.exe") >= 0) {
                    continue;
                }
                // log.info("line="+line);
                if (caption.equals("System Idle Process")
                        || caption.equals("System")) {
                    idletime += Long.valueOf(
                            Bytes.substring(line, kmtidx, rocidx - 1).trim())
                            .longValue();
                    idletime += Long.valueOf(
                            Bytes.substring(line, umtidx, wocidx - 1).trim())
                            .longValue();
                    continue;
                }

                kneltime += Long.valueOf(
                        Bytes.substring(line, kmtidx, rocidx - 1).trim())
                        .longValue();
                usertime += Long.valueOf(
                        Bytes.substring(line, umtidx, wocidx - 1).trim())
                        .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;
    }

    private static final int CPUTIME = 30;
    private static final int PERCENT = 100;
    private static final int FAULTLENGTH = 10;    
    private static final File versionFile = new File("/proc/version");
    private static String linuxVersion = null;

    public static class Bytes {
        public 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;
        }
    }
}