监控系统内存

public CollectorThread(int second,String path,String pid,String name)
    {
        this.second = second;
        this.pid = pid;
        this.name = name;
        String osname = System.getProperty("os.name");
        System.setProperty("PERFMON_PATH",path);
        if("SunOS".equals(osname))
        {
            os = "solaris";
            command = "ps -p "+pid+" -o pid,pcpu,pmem,osz,rss";
        }
        if("AIX".equals(osname))
        {
            os = "aix";
            command = "ps v "+pid;
        }
        if("Linux".equals(osname))
        {
            os = "linux";
            command = "ps u "+pid;
        }
        if(osname.indexOf("Window")>=0)
        {
            os = "window";
            command = "java";
        }
        setPriority(Thread.MIN_PRIORITY);
    }


public void execute()
    {
        try
        {
            Process p = rt.exec(command);
            InputStream is = p.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line = br.readLine();
            line = br.readLine();
            if(line == null || "".equals(line))
                return;
            StringTokenizer st = new StringTokenizer(line);
            String ts = null;
            String cpu = null;
            String mem = null;
            String vmem = null;
            if("solaris".equals(os))
            {
                ts = formatDate(new Date());
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    cpu = st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    vmem = st.nextToken();
                if(st.hasMoreTokens())
                    mem = st.nextToken();
            }
            if("aix".equals(os))
            {
                ts = formatDate(new Date());
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    vmem = st.nextToken();
                if(st.hasMoreTokens())
                    mem = st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    cpu = st.nextToken();
            }
            if("linux".equals(os))
            {
                ts = formatDate(new Date());
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    cpu = st.nextToken();
                if(st.hasMoreTokens())
                    st.nextToken();
                if(st.hasMoreTokens())
                    vmem = st.nextToken();
                if(st.hasMoreTokens())
                    mem = st.nextToken();
            }
            if(mem != null && !"".equals(mem))
                mem = ""+Long.parseLong(mem)*1024;
            if(vmem != null && !"".equals(vmem))
                vmem = ""+Long.parseLong(vmem)*1024;
            if(name != null && !"".equals(name))
            {
                String file = path+"/perfmon_cpu_"+name+".tsv";
                FileOutputStream fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+cpu+"\"\r\n").getBytes());
                fos.close();

                file = path+"/perfmon_mem_"+name+".tsv";
                fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+mem+"\"\r\n").getBytes());
                fos.close();

                file = path+"/perfmon_vmem_"+name+".tsv";
                fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+vmem+"\"\r\n").getBytes());
                fos.close();
            }
            else
            {
                String file = path+"/perfmon_cpu_"+pid+".tsv";
                FileOutputStream fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+cpu+"\"\r\n").getBytes());
                fos.close();

                file = path+"/perfmon_mem_"+pid+".tsv";
                fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+mem+"\"\r\n").getBytes());
                fos.close();

                file = path+"/perfmon_vmem_"+pid+".tsv";
                fos = new FileOutputStream(file,true);
                fos.write(("\""+ts+"\"\t"+"\""+vmem+"\"\r\n").getBytes());
                fos.close();
            }

            is.close();
            p = null;
         }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }