怎样从applet发送byte[]到servlet？

Question

我的applet中发送数据部分如下：
try{
                URLConnection connect;
                String urlText ="http://192.168.102.177:8080/ecommerce/testservlet"; //define url from getDocumentBase() or getCodeBase() since you can only access the same server the applet was loaded from without signing the applet.
                URL url = new URL(urlText);
                connect = url.openConnection();
                connect.setDoOutput(true);
                connect.setDoInput(true);
                connect.setRequestProperty("Content-Type","text/plain");
                OutputStream out = connect.getOutputStream();
                InputStream in = connect.getInputStream();
                //out.writeUTF();
                byte[] b = "ifassfsa sadfasdfam wood".getBytes();
                out.write(b);
                
                byte[] b1 = new byte[6];
                in.read(b1); 
                String str = new String(b1);
                System.out.println("get from server:"+str);
                out.close();
         }catch(Exception e){
          System.out.println("wrong:"+e.toString());
         }在servlet中接收数据如下：
    ServletInputStream in =req.getInputStream();
    ServletOutputStream out = res.getOutputStream();
    //Object bb = req.getAttribute("abc");
    byte[] b = new byte[5];
        in.read(b);
        //in.reate
    out.write("woodpeng is good".getBytes());
    //out.println("the bytes bb we get:"+bb.toString());
    out.println("the bytes b we get:"+new String(b));
    System.out.println("the bytes we get:"+new String(b));
    System.out.println("contect type:"+req.getContentType());
    out.print("receive user message:");结果是在applet中，可以收到servlet中返回的数据，但是servlet却收不到applet发送的byte[],各位看看是什么问题？？？