Java网络编程实现的简单端口扫描器示例

import java.awt.BorderLayout;import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.IOException;import java.net.InetAddress;import java.net.InetSocketAddress;import java.net.Socket;import java.net.SocketAddress;import java.net.UnknownHostException;import java.util.Arrays;import java.util.LinkedList;import java.util.List;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import javax.swing.BorderFactory;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;public class ScanPort extends JFrame { /**  * 端口扫描启动主程序  */ private static final long serialVersionUID = 1L; String str1 = " 常见端口有:"; String str2 = "ftp:21,22,telnet:23,smtp:25,http:80"; String str3 = "dns:53,tftp:69,snmp:161,162"; String str4 = "1158,1433,1521,2100,3128,26,69"; String str5 = "3306,3389,7001,8080,8081,110,143"; String str6 = "9080,9090,43958,443,465,995,1080"; JButton jb1 = new JButton("strat"); JTextArea jta = new JTextArea(); JScrollPane jsp = new JScrollPane(jta); JTextField jtf = new JTextField(17); String IP = "";//待扫描IP或域名 List <Integer>portList = new LinkedList<Integer>();// 定义一个List容器表示扫描的团口的List集合 Integer[] ports = new Integer[] { 21, 22, 23, 25, 26, 53,69, 80, 110, 143,   443,465,69,161,162,135,995,1080,1158,1433,1521,2100, 3128, 3306, 3389,   7001, 8080, 8081, 9080, 9090, 43958 ,135,445,1025,1026,1027,1028,1055,5357}; // 常见端口集合 public ScanPort() {  this.add(getPanel(), BorderLayout.SOUTH);  jsp.setBorder(BorderFactory.createEtchedBorder());  jsp.setBackground(Color.cyan);  this.add(jsp, BorderLayout.CENTER);  this.add(getPanel2(), BorderLayout.NORTH);  this.add(getPanel3(), BorderLayout.WEST);  this.setBounds(300, 60, 600, 600);  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  this.setTitle("ScanPort");  jta.setTabSize(4);  jta.setFont(new Font("标楷体", Font.BOLD, 16));  jta.setLineWrap(true);// 激活自动换行功能  jta.setWrapStyleWord(true);// 激活断行不断字功能  portList.addAll(Arrays.asList(ports));  //将ports中的值加入到set中，并去掉重复的  jb1.addActionListener(new ActionListener() {   @Override   public void actionPerformed(ActionEvent e) {    // TODO Auto-generated method stub    IP = jta.getText();    //ip为文本框内输入的字符串    scanPorts(IP, portList, 10, 800);    //超时时间设定为800，线程数设定为10   }  });  this.setVisible(true); } /**  * 多线程扫描目标主机指定List端口集合的开放情况  *  * @param ip  *   待扫描IP或域名  * @param portList  *   待扫描的端口的List集合  * @param threadNumber  *   线程数  * @param timeout  *   连接超时时间  * */ public void scanPorts(String ip, List<Integer> portSet,int threadNumber, int timeout) {  ExecutorService threadPool = Executors.newCachedThreadPool();  //线程池  for (int i = 0; i < threadNumber; i++) {   //10个线程 加入到线程池里   ScanMethod scanMethod2 = new ScanMethod(ip, portSet,threadNumber, i, timeout);   threadPool.execute(scanMethod2);  }  threadPool.shutdown();  while (true) {   if (threadPool.isTerminated()) {    System.out.println("扫描结束");    break;   }   try {    Thread.sleep(1000);   } catch (InterruptedException e) {    e.printStackTrace();   }  }// end of while } /*  * 扫描方式：针对一个待扫描的端口的List集合进行扫描  */ private class ScanMethod implements Runnable {  private String ip; // 目标IP  private List<Integer> portList; // 待扫描的端口的List集合  private int threadNumber, serial, timeout; // 线程数，这是第几个线程，超时时间  public ScanMethod(String ip, List<Integer> portList, int threadNumber,int serial, int timeout) {   this.ip = ip;   this.portList = portList;   this.threadNumber = threadNumber;   this.serial = serial;   this.timeout = timeout;  }  public void run() {   int port = 0;   Integer[] ports = portList.toArray(new Integer[portList.size()]); // List转数组   try {    InetAddress address = InetAddress.getByName(ip); //如果输入的是主机名，尝试获取ip地址    Socket socket;//定义套接字    SocketAddress socketAddress;//传递ip和端口    if (ports.length < 1)     //若数组没有元素，返回，不执行     return;    for (port = 0 + serial; port <= ports.length - 1; port += threadNumber) {     //每次运行10个线程     socket = new Socket();     //为对象分配内存空间     socketAddress = new InetSocketAddress(address, ports[port]);     try {      socket.connect(socketAddress, timeout);      //对目标主机的指定端口进行连接，超时后连接失败      socket.close();      //关闭端口      System.out.println("端口 " + ports[port] + " ：开放");      jta.append("端口 " + ports[port] + " ：开放/n");      //在文本区域里更新消息     } catch (IOException e) {      System.out.println("端口 " + ports[port] + " ：关闭");      jta.append("端口 " + ports[port] + " ：关闭/n");      //产生异常表示端口关闭     }    }   } catch (UnknownHostException e) {    e.printStackTrace();   }  }  //end of run() }//end of ScanMethod public JPanel getPanel() {  JPanel jp = new JPanel();  jp.add(jb1, BorderLayout.CENTER);  jp.setBorder(BorderFactory.createRaisedBevelBorder());  jp.setBackground(Color.lightGray);  return jp; } public JPanel getPanel2() {  JPanel jp = new JPanel();  JLabel jl = new JLabel();  jl.setText("请输入主机名或ip地址，将扫描该主机的常见端口号：");  jp.add(jl);  jp.add(jtf);  jp.setBorder(BorderFactory.createRaisedBevelBorder());  jp.setBackground(Color.LIGHT_GRAY);  return jp; } public JPanel getPanel3() {  JLabel jl1 = new JLabel(str1);  JLabel jl2 = new JLabel(str2);  JLabel jl3 = new JLabel(str3);  JLabel jl4 = new JLabel(str4);  JLabel jl5 = new JLabel(str5);  JLabel jl6 = new JLabel(str6);  JPanel jp = new JPanel();  jp.setLayout(new GridLayout(6, 1));  jp.add(jl1);  jp.add(jl2);  jp.add(jl3);  jp.add(jl4);  jp.add(jl5);  jp.add(jl6);  jp.setBorder(BorderFactory.createEtchedBorder());  //蚀刻边框  return jp; } public static void main(String[] args) {  new ScanPort(); }}