UserBean userBean = userService.LoginIn(username, password);

As an AI language model, I am not aware of the specific implementation of the "userService" and "LoginIn" methods. However, it seems that this code is attempting to authenticate a user by calling a method named "LoginIn" from a service named "userService" with the provided username and password parameters. The returned value is then assigned to a variable named "userBean" of type "UserBean". It is likely that the "UserBean" class contains information about the authenticated user, such as their username, email, and other relevant details.

相关问题

session.setAttribute("userBean",userBean); String username=request.getParameter("username").trim(); String password=request.getParameter("password").trim(); String again_password=request.getParameter("again_password").trim(); String sex=request.getParameter("sex").trim(); String phone=request.getParameter("phone").trim(); boolean isLD=true; //联动注册：是否填写联系方式 boolean boo=username.length()>0&&password.length()>0&&isLD; 怎么联动注册sex和phone两个数据

联动注册指的是在用户填写必填项的同时，也要求用户填写其他相关信息。在这段代码中，已经判断了是否填写了联系方式（isLD），那么可以在这个判断的基础上再加上对sex和phone的判断。比如：

boolean boo = username.length() > 0 && password.length() > 0 && isLD && sex.length() > 0 && phone.length() > 0;

这样，只有当必填项和sex、phone都填写了，boo才会为true，表示可以进行注册。

try { con=DriverManager.getConnection(url); String insertCondition="INSERT INTO users(username,password,sex,phone) VALUES (?,?,?,?)"; sql=con.prepareStatement(insertCondition); if(boo) { sql.setString(1,username); sql.setString(2,password); sql.setString(3,sex); sql.setString(4,phone); int m=sql.executeUpdate(); //判断数据是否存入数据库 if(m!=0) { backNews="注册成功"; //若存入则注册成功 userBean.setBackNews(backNews); userBean.setUsername(username); session.setAttribute("success", 1); } }

在这段代码中，如果用户没有填写性别和联系方式，则会直接跳过注册的过程，不会将数据存入数据库。如果需要进行联动注册，则可以修改代码，让用户必须填写性别和联系方式才能进行注册。

可以在这段代码中添加以下判断：

boolean isLD = true; // 联动注册：必须填写性别和联系方式才能注册
boolean boo = username.length()>0 && password.length()>0 && isLD && sex.length()>0 && phone.length()>0; // 用户名、密码、性别和联系方式不能为空

if (boo) {
    con = DriverManager.getConnection(url);
    String insertCondition = "INSERT INTO users(username, password, sex, phone) VALUES (?, ?, ?, ?)";
    sql = con.prepareStatement(insertCondition);
    sql.setString(1, username);
    sql.setString(2, password);
    sql.setString(3, sex);
    sql.setString(4, phone);
    int m = sql.executeUpdate(); // 判断数据是否存入数据库
    if (m != 0) {
        backNews = "注册成功"; // 若存入则注册成功
        userBean.setBackNews(backNews);
        userBean.setUsername(username);
        session.setAttribute("success", 1);
    }
}

这样，只有当用户填写了性别和联系方式，才能进行注册。如果没有填写，就不允许进行注册。