1.通過POST方法，發送數據至HTTP Server 
2.大家通常忽略Content-Type和Content-Length 

...... 
conn.setRequestMethod(HttpConnection.POST); 

conn.setRequestProperty("User-Agent","Profile/MIDP-1.0 Configuration/CLDC-1.0" ); 
conn.setRequestProperty("Content-Language", "en-US" ); 

postmsg = request.getBytes(); 

conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 
conn.setRequestProperty("Content-Length",Integer.toString( postmsg != null?postmsg.length : 0 ) ); 

out = conn.openOutputStream(); 
out.write(postmsg); 
......