星期5晚上寫了的jsp實現掃描對方的端口...一開始測試比較麻煩~~因為要使用多線程就需要extends thread或者implemets runnable 也就是說需要一個類~~ 在jsp 里面寫一個類,不就是成員內部類咯！哎郁悶啊！之后寫完再測試~~ 又發現問題了！要是當前jsp的線程執行完了就會自動閉合out對象 然而我其他線程的out內容就會沒法輸入~~郁悶ing... 后來想了一個 沒辦法中的辦法！就是在當前線程睡覺一會thread.sleep() 廢話少說了~~下面給出代碼！

//掃描port函數
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);
}//掃描類
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){}
           }
       }
    }
}