使用Java mysql从数据库查看图像后如何设置图像大小

Question

我正在尝试使用java mysql.setIcon（imageIcon）从数据库查看图像后设置图像大小。此标签以供查看。 到目前为止，我尝试过的工作都附在下面。

String id = txtid.getText();                   
    try {
        Class.forName("com.mysql.jdbc.Driver");                      
         con = DriverManager.getConnection("jdbc:mysql://localhost/empay","root","");                       
         pst = con.prepareStatement("select * from records where id=?");
         pst.setString(1, id);
         rs = pst.executeQuery();

         if(rs.next()==false)
                {
                    JOptionPane.showMessageDialog(this,"Data not Found");
                }
                else
                {
                    String firstname = rs.getString("firstname");
                    String lastname = rs.getString("lastname");
                    String address = rs.getString("address");
                    String bsal = rs.getString("bsal");                  


                    Blob  blob1 =rs.getBlob("photo");
        byte[ ]  _imagebytes=blob1.getBytes( 1, (int) blob1.length( ) );



                    txtfirstname.setText(firstname.trim());
                    txtlastname.setText(lastname.trim());
                    txtaddress.setText(address.trim());
                    txtbsal.setText(bsal.trim());
                    imagelabel.setIcon(_imagebytes);