SSM实现的一套用户登录注册系统,附带验证等功能(使用idea开发)

未登录时的界面:

登录和注册界面,有动态效果:
登陆之后的界面
拥有完善的验证功能

package com.yue.service;

import com.yue.mapper.UserMapper;
import com.yue.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

@Service("UserService")
public class UserServiceImpl implements UserService{

    @Autowired
    private UserMapper userMapper;

    public void addUser(User user) {
        User exituser = userMapper.getUserByUsername(user.getUser_username());
        if(user.getUser_username().trim()=="") throw new RuntimeException("账号不可为空!!!");
        if(user.getUser_name().trim()=="") throw new RuntimeException("昵称不可为空!!!");
        if(user.getUser_password().trim()=="") throw new RuntimeException("密码不可为空!!!");
        if(exituser!=null){
            throw new RuntimeException("账号已存在");
        }else{
            userMapper.addUser(user);
        }
    }

    public User login(User user) {
        User exituser = userMapper.getUserByUsername(user.getUser_username());
        if(user.getUser_username().trim()=="") throw new RuntimeException("账号不可为空!!!");
        if(user.getUser_password().trim()=="") throw new RuntimeException("密码不可为空!!!");
        if(exituser==null){
            throw new RuntimeException("账号不存在!!!");
        }
        if(exituser.getUser_password().equals(user.getUser_password())){
            return exituser;
        }else{
            throw new RuntimeException("密码错误!!!");
        }
    }

    public void updataUser(String user_username, String user_password1, String user_password2, String user_password3) {
        User user = userMapper.getUserByUsername(user_username);
        System.out.println(user);
        if(!user.getUser_password().equals(user_password1)){
            throw new RuntimeException("旧密码输入不正确！");
        }
        if(!user_password2.equals(user_password3)){
            throw new RuntimeException("两次输入的密码不同！");
        }
        user.setUser_password(user_password2);
        System.out.println(user);
        userMapper.updataUser(user);
    }


}

数据库创建代码在实体类中
源码链接

https://download.csdn.net/download/weixin_44284599/12273296
https://gitee.com/yueliu2345/UserSystem