applet中使用URLConnection获取远程对象

服务器端：

@RequestMapping("/obtainUser")
public voidobtainUser(Integer uid, HttpServletResponse response)
            throws IOException {
    　　 //假设一用户实例
        User user = userService.get(uid); 
     
        ObjectOutputStream objstream = new ObjectOutputStream(response.getOutputStream());
        objstream.writeObject(user);
        objstream.flush();
}        

applet端：

使用这种方式时，需要将远程获取的POJO类一同打包

private User obtainRemoteUser(Integer uid){

    URL url = new URL(getCodeBase(),"/obtainUser?uid=" + uid + "");
    URLConnection conn = url.openConnection();
    conn.setUseCaches(false);
    conn.setRequestProperty("Cookie", "JSESSIONID="+sid); //使用firefox时会使用session丢失，对于一些有登录要求的系统将不能获取远程对象

    ObjectInputStream objstream = new ObjectInputStream(conn.getInputStream());
    User user= (User) objstream.readObject();

    return user;  
}