Java Socket 测试本机使用的端口

最新推荐文章于 2024-12-23 23:49:56 发布

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本文介绍了一个使用Java实现的端口扫描器，通过遍历1-255范围内的端口，检查本地主机上每个端口的使用情况。代码包含基本的异常处理逻辑。

源：http://blog.youkuaiyun.com/hailongge/article/details/5109044
评：

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class sampletest
{
public static void main(String[] args)
{
for(int i=1;i<256;i++)
{
try
{
InetAddress localHost=InetAddress.getLocalHost();
Socket socket=new Socket(localHost,i);
System.out.println("本机已经使用了端口："+i);
}
catch(UnknownHostException e)
{
//e.printStackTrace();
}
catch(IOException e)
{
// e.printStackTrace();
}
}
System.out.println("执行完毕！");
}
}

[java] view plaincopy

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class sampletest
{
public static void main(String[] args)
{
for(int i=1;i<256;i++)
{
try
{
InetAddress localHost=InetAddress.getLocalHost();
Socket socket=new Socket(localHost,i);
System.out.println("本机已经使用了端口："+i);
}
catch(UnknownHostException e)
{
//e.printStackTrace();
}
catch(IOException e)
{
// e.printStackTrace();
}
}
System.out.println("执行完毕！");
}
}

Java代码复制代码

import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

public class sampletest implements Runnable
{
public sampletest(){

}
public void searchPort(){
System.out.println("本机已经使用了端口：");
for(int i=1;i<256;i++)
{
try
{
InetAddress localHost=InetAddress.getLocalHost();
Socket socket=new Socket(localHost,i);
System.out.print(" "+i+":使用");
}
catch(UnknownHostException e)
{
//e.printStackTrace();
}
catch(IOException e)
{
System.out.print(" "+i+":空闲");
// e.printStackTrace();
}
}
System.out.println("执行完毕！");

}
public void run() {
for(;;){
try {
Thread.sleep(3000);
this.searchPort();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// TODO Auto-generated method stub

}
public static void main(String[] args){
Runnable rb = new sampletest();
new Thread(rb).start();
}
}