用Java编程来实现CPU和Memory监控器并将数据持久化，保存在文件中。急用，请帮帮忙，谢谢。 用Java编写在CPU和Memory监控器中，将数据持久化,...

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public static String getCpuUsage(){
Sigar sigar=new Sigar();
CpuPerc cpuList[]=null;
String cpuUsagePer="";
try{
cpuList=sigar.getCpuPercList();
}catch(SigarException e){
e.printStackTrace();
// return ;
}
for(int i=0;i<cpuList.length;i++){
CpuPerc cpuUsage=cpuList[i];
String User=String.valueOf(CpuPerc.format(cpuUsage.getUser()));//\u7528\u6237\u4f7f\u7528\u7387\uff08\u8fd0\u884c\u7528\u6237\u8fdb\u7a0b\uff09
String sysPer=String.valueOf(CpuPerc.format(cpuUsage.getSys()));//\u7cfb\u7edf\u4f7f\u7528\u7387\uff08\u8fd0\u884ckernel\uff09
String waitPer=String.valueOf(CpuPerc.format(cpuUsage.getWait()));//\u5f53\u524d\u7b49\u5f85\u7387\uff08\u7b49\u5f85IO\u64cd\u4f5c\u5b8c\u6210\uff09
String nicePer=String.valueOf(CpuPerc.format(cpuUsage.getNice()));//\u88abNICE\u6539\u53d8\u4f18\u5148\u7ea7\u7684\u82b1\u8d39
String idlePer=String.valueOf(CpuPerc.format(cpuUsage.getIdle()));//\u5f53\u524d\u7a7a\u95f2\u7387\uff08\u95f2\u7f6e\u5f85\u5206\u914d\uff09
String totalPer=String.valueOf(CpuPerc.format(cpuUsage.getCombined()));//\u603b\u7684\u4f7f\u7528\u7387\uff08\u7528\u6237\uff0b\u7cfb\u7edf\uff09
cpuUsagePer=cpuUsagePer+User+"--"+sysPer+"--"+waitPer+"--"+nicePer+"--"+idlePer+"--"+totalPer+";";
}
return cpuUsagePer;
}
public static String getMemery() throws SigarException{
Sigar sigar=new Sigar();
Mem mem=sigar.getMem();
String memery=null;
String totalMem=mem.getTotal()/1024L+"K";//\u5185\u5b58\u603b\u91cf
String usedMem=mem.getUsed()/1024L+"K";//\u5f53\u524d\u5185\u5b58\u4f7f\u7528\u91cf
String freeMem=mem.getFree()/1024L+"K";//\u5f53\u524d\u5185\u5b58\u5269\u4f59\u91cf
String usedMemPer=mem.getUsed()*100/mem.getTotal()+"%";
memery=totalMem+"--"+usedMem+"--"+freeMem+"--"+usedMemPer;
return memery;
}

首先建一个文本文件，比如在D盘根目录下，名字为：int.txt，然后写一个Java类CalcNumber.java。****************************************************************int.txt里面的文本如下：1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 3031 32 33 34 35 36 37 38 39 4041 42 43 44 45 46 47 48 49 50****************************************************************CalcNumber.java类代码如下：import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.GridLayout;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import javax.swing.BorderFactory;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.UIManager;public class CalcNumber extends JFrame { JTextArea in; JTextArea suText; JTextArea heText; public CalcNumber() { this.setTitle("计算素数和合数"); // 输入框 in = new JTextArea(4, 1); in.setAutoscrolls(true); JScrollPane inScroll = new JScrollPane(in); in.setBorder(BorderFactory.createBevelBorder(1)); JPanel upper = new JPanel(new BorderLayout()); upper.add(inScroll); // 按钮 JButton imp = new JButton("导入文本"); imp.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try { BufferedReader br = new BufferedReader(new FileReader( "d:\\int.txt")); String s; while ((s = br.readLine()) != null) { in.setText(in.getText() + "\n" + s); } br.close(); } catch (FileNotFoundException e1) { e1.printStackTrace(); } catch (IOException e2) { e2.printStackTrace(); } } }); JButton start = new JButton("启动两个线程并计算"); start.addActionListener(new CalcActionListener()); JPanel buttonP = new JPanel(); buttonP.add(imp); buttonP.add(start); // 结果 JPanel result = new JPanel(new GridLayout(1, 2)); JPanel suPanel = new JPanel(); suPanel.setBorder(BorderFactory.createTitledBorder("以下为素数")); JPanel hePanel = new JPanel(); hePanel.setBorder(BorderFactory.createTitledBorder("以下为合数")); result.add(suPanel); result.add(hePanel); suText = new JTextArea(4, 25); JScrollPane suScroll = new JScrollPane(suText); suText.setBorder(BorderFactory.createBevelBorder(1)); heText = new JTextArea(4, 25); JScrollPane heScroll = new JScrollPane(heText); heText.setBorder(BorderFactory.createBevelBorder(1)); suPanel.add(suScroll); hePanel.add(heScroll); // 总 JPanel all = new JPanel(new GridLayout(2, 1, 2, 2)); all.setBorder(BorderFactory.createTitledBorder("计算素数和合数")); all.add(upper); all.add(result); this.add(buttonP, BorderLayout.SOUTH); this.add(all, BorderLayout.CENTER); // this.setSize(400, 300); this.pack(); Toolkit tool = Toolkit.getDefaultToolkit(); Dimension screen = tool.getScreenSize(); this.setLocation(screen.width / 2 - this.getWidth() / 2, screen.height / 2 - this.getHeight() / 2); this.setVisible(true); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } class CalcActionListener implements ActionListener, Runnable { public void actionPerformed(ActionEvent e) { Thread suThread = new Thread(new CalcActionListener(), "su"); Thread heThread = new Thread(new CalcActionListener(), "he"); suThread.start(); heThread.start(); } public void run() { String s = in.getText(); String[] arr = s.split("\\s"); StringBuffer su = new StringBuffer(); StringBuffer he = new StringBuffer(); for (int i = 0; i < arr.length; i++) { boolean flag = false; if (!arr[i].equals("") && arr[i] != null) { int n = Integer.valueOf(arr[i]); for (int j = 2; j < n; j++) { if (n % j == 0) { flag = true; } } if (Thread.currentThread().getName().equals("su") && flag == false) { su = su.append(" " + n); } if (Thread.currentThread().getName().equals("he") && flag == true) { he = he.append(" " + n); } } } if (Thread.currentThread().getName().equals("su")) { suText.setText(new String(su)); } else { heText.setText(new String(he)); } } } public static void main(String[] args) throws Exception { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); CalcNumber c = new CalcNumber(); }}****************************************************************运行结果如下：

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