java获取内网的所有IP地址.doc

JAVA获取内网所有IP地址程序代码：import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import .InetAddress;import java.util.Hashtable;import java.util.Iterator;import java.util.Set;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;/* * author 张振坤 * 获得内网的所有IP地址 */SuppressWarnings(serial)public class gainallip extends JFrame private JTextArea ta_allIp; static public Hashtable pingMap; / 用于存储所ping的IP是否为内网IP的集合 /* * Launch the application * * param args */ public static void main(String args) gainallip frame = new gainallip(); frame.setVisible(true); public void gainAllIp() throws Exception / 获得所有IP，并显示在文本域中的方法 InetAddress host = InetAddress.getLocalHost();/ 获得本机的InetAddress对象 String hostAddress = host.getHostAddress();/ 获得本机的IP地址 int pos = hostAddress.lastIndexOf(.);/ 获得IP地址中最后一个点的位置 String wd = hostAddress.substring(0, pos + 1);/ 对本机的IP进行截取，获得网段 for (int i = 1; i = 255; i+) / 对局域网的IP地址进行遍历 String ip = wd + i;/ 生成IP地址 PingIpThread thread = new PingIpThread(ip);/ 创建线程对象 thread.start();/ 启动线程对象 Set set = pingMap.keySet();/ 获得集合中键的Set视图 Iterator it = set.iterator();/ 获得迭代器对象 while (it.hasNext() / 迭代器中有元素，则执行循环体 String key = it.next(); / 获得下一个键的名称 String value = pingMap.get(key);/ 获得指定键的值 if (value.equals(true) ta_allIp.append(key + n);/ 追加显示IP地址 /* * Create the frame */ public gainallip() super(); addWindowListener(new WindowAdapter() public void windowOpened(final WindowEvent e) try gainAllIp(); ta_allIp.setText(null); catch (Exception e1) ta_allIp.setText(null); ); setTitle(获得内网的所有IP地址); setBounds(400, 200, 270, 375); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); final JScrollPane scrollPane = new JScrollPane(); getContentPane().add(scrollPane, BorderLayout.CENTER); ta_allIp = new JTextArea(); scrollPane.setViewportView(ta_allIp); final JPanel panel = new JPanel(); getContentPane().add(panel, BorderLayout.NORTH); final JButton button_2 = new JButton(); button_2.addActionListener(new ActionListener() public void actionPerformed(final ActionEvent e) try ta_allIp.setText(null); gainAllIp(); catch (Exception e1) ta_allIp.setText(null); JOptionPane.showMessageDialog(null, 应用程序异常，请再试一次。); ); button_2.setText(显示所有IP); panel.add(button_2); final JButton button = new JButton(); button.addActionListener(new ActionListener() public void actionPerformed(final ActionEvent e) System.exit(0); ); button.setText(退 出); panel.add(button); final JButton button_1 = new JButton(); button_1.setText(New JButton); panel.add(button_1); pingMap = new Hashtable(); class PingIpThread extends Thread / 判断给定IP是否为内网IP的线程对象 public String ip; / 表示IP地址的成员变量 public PingIpThread(String ip) / 参数为需要判断的IP地址 this.ip = ip; public void run() try / 获得所ping的IP进程，-w 280是等待每次回复的超时时间，-n 1是要发送的回显请求数 Process process = Runtime.getRuntime().exec( ping + ip + -w 280 -n 1); InputStream is = process.getInputStream();/ 获得进程的输入流对象 InputStreamReader isr = new InputStreamReader(is);/ 创建InputStreamReader对象 BufferedReader in = new BufferedReader(isr);/ 创建缓冲字符流对象 String line = in.readLine();/ 读取信息 while (line != null) if (line != null & !line.equals() if (line.substring(0,