/*写了个简单的线程处理*/
public static void output(final InputStream in, final ServletOutputStream out){
         new Thread(){
             public void run(){
                 byte[] buf = new byte[1024];
                 int n=0;
                 try{
                     while((n=in.read(buf))!=-1){
                         out.write(buf, 0, n);
                     }
                 }catch(Exception e){
                     e.printStackTrace();
                 }finally{
                     try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                     try {
                        out.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                 }
             }
         }.start();
    }

------解决方案--------------------

 out.write一行后就out.flush()一下，这样在页面就会输出write的内容的