jsp上面可以实现端口扫描

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<br>");
           }
           catch(ioexception e){
           }finally{
                try{s.close();}catch(exception e){}
           }
       }
    }
}