Java线程池技术实现TCP端口扫描

一个简单的利用线程池技术实现端口扫描（TCP）的小程序

关键代码如下

// 扫描本机

private void getLocal()

{

String ip = getIP();

String portStart = txPortStartgetText()trim();

String portEnd = txPortEndgetText()trim();

if (portStartlength() == || portEndlength() == )

return;

int s = ;

int e = ;

try {

s = IntegervalueOf(portStart);

e = IntegervalueOf(portEnd);

} catch (Exception ex) {

JOptionPaneshowMessageDialog(null 端口输入有误);

return;

}

// 检查端口是否超出范围

if (! (checkPort(s) && checkPort(e)))

{

JOptionPaneshowMessageDialog(null 端口应该大于而小于);

return;

}

scann(ip s e);

runThread(); // 启动线程 监视扫描是否已完成

}

private String getIP()

{

try {

InetAddress addr = InetAddressgetLocalHost();

return addrgetHostAddress()toString(); // ip

}

catch (Exception e)

{

JOptionPaneshowMessageDialog(null 获取IP出错!);

}

return null;

}

// 扫描单个IP

private void scann(String ip int startPort int endPort)

{

// 将所有按钮设为不可用

setBtnEdit(false);

statussetText(请稍候);

String[] add = {ip };

tableaddRow(add);

exec = ExecutorsnewFixedThreadPool();

for (int i = startPort; i <= endPort; i++)

execexecute(new RunSocket(ip i));

execshutdown();

}