Java编写的端口的扫描程序（web端口80和ftp端口21）

1.数据的连接代码

package spider;import java.sql.*;public class Conn {public static Connection connection(){Connection conn=null;String url="jdbc:mysql://192.168.21.52:3306/spider";String root="zpp";String pwd="111";try{//加载驱动Class.forName("com.mysql.jdbc.Driver");conn=DriverManager.getConnection(url,root,pwd);}catch(Exception  e){e.printStackTrace();}return conn;}}

2、开启线程进行验证（原本想使用多线程实现的，但是不行）

package spider;import java.sql.*;import java.net.*;import java.io.*;public class  StartIP extends Thread{long starttime=System.currentTimeMillis();private Connection conn=null;private Statement stmt=null;String ip="";String sql="";int [] port={80,21};Socket socket=null;public StartIP(){//this.ip=ip;conn=Conn.connection();}//存储web  ippublic   void Savewebip(String ip){try{//System.out.println(ip);stmt=conn.createStatement();sql="insert into spider2(ip,port)  values('"+ip+"','"+port[0]+"')";stmt.executeUpdate(sql);}catch(SQLException ew){System.out.println(ew.toString());}}//存储ftp   ippublic   void Saveftpip(String ip){try{//System.out.println(ip);stmt=conn.createStatement();sql="insert into spider1(ip,port)  values('"+ip+"','"+port[1]+"')";stmt.executeUpdate(sql);}catch(SQLException ew){System.out.println(ew.toString());}}//验证ip的80端口是否打开public void SouwebIP(String ip){try{InetAddress inet=InetAddress.getByName(ip);InetSocketAddress  inetsocket=new InetSocketAddress(ip,port[0]); socket=new Socket(); socket.connect(inetsocket,1000);//  System.out.println(ip);socket.close();Savewebip(ip);}catch(IOException e){System.out.println(ip+"...web没有打开。。。");try{socket.close();}catch(IOException r){r.printStackTrace();}e.printStackTrace();}finally{try{if(socket!=null)socket.close();}catch(IOException er){System.out.println("关闭。。。");//er.printStackTrace();}}}//验证ip的21端口是否打开public void SouftpIP(String ip){try{InetAddress inet=InetAddress.getByName(ip);InetSocketAddress  inetsocket=new InetSocketAddress(ip,port[1]); socket=new Socket(); socket.connect(inetsocket,1000);//  System.out.println(ip);socket.close();Saveftpip(ip);}catch(IOException e){System.out.println(ip+"...ftp没有打开。。。");try{socket.close();}catch(IOException r){r.printStackTrace();}e.printStackTrace();}finally{try{if(socket!=null)socket.close();}catch(IOException er){System.out.println("关闭。。。");//er.printStackTrace();}}}//产生ip地址public    void MakeIp(){String ip1="";String ip2="";String ip="";//String sql="";//Socket socket=null;for(int i=0;i<255;i++){ for(int j=0;j<255;j++){ ip1=String.valueOf(i); ip2=String.valueOf(j); ip="192.168."+ip1+"."+ip2; //ip="192.168.21."+ip2; SouwebIP(ip);SouftpIP(ip);//ping(ip);}}//记录扫描的时间long endtime=System.currentTimeMillis();long totaltime=endtime-starttime;System.out.println("total...."+totaltime+"ms");}public synchronized void run(){MakeIp();}}

3.主类

开启线程进行扫描

package spider;import java.net.*;import java.io.*;import java.sql.*;public class IP{public IP(){StartIP startIp1=new StartIP();startIp1.start();}public static void main(String [] args){new IP();}}

这个是个人，参考相关的代码，写的，有什么错误，请指教，大家共同学习啊