js|端口扫描

星期5晚上写了的JSP实现扫描对方的端口...一开始测试比较麻烦~~因为要使用多线程就需要extends Thread或者implemets Runnable 也就是说需要一个类~~ 在JSP 里面写一个类,不就是成员内部类咯！哎郁闷啊！之后写完再测试~~ 又发现问题了！要是当前JSP的线程执行完了就会自动闭合out对象 然而我其他线程的out内容就会没法输入~~郁闷ing... 后来想了一个 没办法中的办法！就是在当前线程睡觉一会Thread.sleep() 废话少说了~~下面给出代码！

//扫描port函数
void scanPort(javax.servlet.jsp.JspWriter out,String strAddress,int startPort,int endPort)throws Exception{
    if(endPort<startPort||startPort<=0||startPort>65535||endPort>65535||endPort<=0){
        out.print("port setup error");
        return;
    }
    InetAddress ia=InetAddress.getByName(strAddress);
    for(int p=startPort;p<=endPort;p+=15){
        (new ScanPort(ia,p,p+14,out)).start();
    }
    Thread.sleep((int)(endPort/startPort)*5000);
}//扫描类
class ScanPort extends Thread{
    int startPort;
    int endPort;
    InetAddress address;
    javax.servlet.jsp.JspWriter out;
    public ScanPort(InetAddress address,int startPort,int endPort,javax.servlet.jsp.JspWriter out){
        this.address=address;
        this.startPort=startPort;
        this.endPort=endPort;
        this.out=out;
    }
    public void run(){
       Socket s=null;
       for(int port=startPort;port<=endPort;port++){
           try{
               s=new Socket(address,port);
               out.println("port "+port+" is Open
");
           }
           catch(IOException e){
           }finally{
                try{s.close();}catch(Exception e){}
           }
       }
    }
}