处理
session.setAttribute("errorMsgForNewUser", "注册失败，用户名已存在，请重新输入！");
request.getRequestDispatcher("/static/html/newUser.jsp").forward(request, response);
return;
}
session.setAttribute("errorMsgForNewUser", "");

/*
* 将新注册的账号信息加入baidupan_user表
*/
String addNewUserRes = getDataFromDB.addNewUser(userName, userPassword);
if (!addNewUserRes.equals("success")) {
// 当用户注册时出错处理
session.setAttribute("errorMsgForNewUser", "注册失败，服务器异常，请重新注册！");
request.getRequestDispatcher("/static/html/newUser.jsp").forward(request, response);
return;
}
session.setAttribute("errorMsgForNewUser", "");

/*
* 将新注册的账号信息加入登录信息表
*/
String newUserLoginRes = getDataFromDB.newUserLogin(userName);
if (!newUserLoginRes.equals("success")) {
// 当用户注册时出错处理
session.setAttribute("errorMsgForNewUser", "注册失败，服务器异常，请重新注册！");
request.getRequestDispatcher("/static/html/newUser.jsp").forward(request, response);
return;
}
session.setAttribute("errorMsgForNewUser", "");

/*
* 将新注册的账号信息加入到登录状态表
*/
String newUserLoginStatusRes = getDataFromDB.newUserLoginStatus(userName);
if (!newUserLoginStatusRes.equals("Success")) {
// 当用户注册时出错处理
session.setAttribute("errorMsgForNewUser", "注册失败，服务器异常，请重新注册！");
request.getRequestDispatcher("/static/html/newUser.jsp").forward(request, response);
return;
}
session.setAttribute("errorMsgForNewUser", "");

/*
* 注册成功后，将用户信息存放到session中
*/
session.setAttribute("loginUserName", userName);
session.setAttribute("hasLogined", true);

/*
* 跳转到新内容界面
*/
url = "/listMyResources";
request.getRequestDispatcher(url).forward(request, response);

}

}