24-修改密码功能

概述

本文接着写smbms的修改密码的功能
功能不算难，核心就是数据库的update语句

实践

UserDao.java

package com.kuang.dao.user;

import com.kuang.pojo.User;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

/**
 * 功能描述
 *
 * @since 2022-09-05
 */
public interface UserDao {
    public User getLoginUser(Connection conn, PreparedStatement preparedStatement, ResultSet resultSet, String sql,
        Object[] params);

    // 修改当前用户密码
    public int updataUserPwd(Connection conn, PreparedStatement preparedStatement, int id, String pwd);
}

UserDaoImpl.java

package com.kuang.dao.user;

import com.kuang.dao.BaseDao;
import com.kuang.pojo.User;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * 功能描述
 *
 * @since 2022-09-05
 */
public class UserDaoImpl implements UserDao {
    @Override
    public User getLoginUser(Connection conn, PreparedStatement preparedStatement, ResultSet resultSet, String sql,
        Object[] params) {
        User user = new User();
        try {
            resultSet = BaseDao.execute(conn, sql, params, preparedStatement, resultSet);
            if (resultSet.next()) {
                user.setAddress(resultSet.getString("address"));
                user.setBirthday(resultSet.getDate("birthday"));
                user.setUserCode(resultSet.getString("userCode"));
                user.setUserName(resultSet.getString("userName"));
                user.setUserPassword(resultSet.getString("userPassword"));
                user.setUserRole(resultSet.getString("userRole"));
                user.setCreatedBy(resultSet.getInt("createdBy"));
                user.setCreationDate(resultSet.getDate("creationDate"));
                user.setModifyBy(resultSet.getInt("modifyBy"));
                user.setModifyDate(resultSet.getDate("modifyDate"));
                user.setGender(resultSet.getInt("gender"));
                user.setId(resultSet.getInt("id"));
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return user;
    }

    @Override
    public int updataUserPwd(Connection conn, PreparedStatement preparedStatement, int id, String pwd) {
        String sql = "update smbms_user set userPassword=? where id=?";
        Object[] params = {pwd, id};
        int result = 0;
        try {
            result = BaseDao.execute(conn, sql, params, preparedStatement);
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return result;
    }
}

UserService.java

package com.kuang.service;

import com.kuang.pojo.User;

/**
 * 功能描述
 *
 * @since 2022-09-05
 */
public interface UserService {
    public User getLoginUser(String UserCode);

    // 更新用户名密码
    public boolean updateUserPwd(int id, String pwd);
}

UserServiceImpl.java

package com.kuang.service;

import com.kuang.dao.BaseDao;
import com.kuang.dao.user.UserDao;
import com.kuang.dao.user.UserDaoImpl;
import com.kuang.pojo.User;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

/**
 * 功能描述
 *
 * @since 2022-09-05
 */
public class UserServiceImpl implements UserService {
    private Connection connection = BaseDao.getConnection();

    private UserDao userDao;

    public UserServiceImpl() {
        userDao = new UserDaoImpl();
    }

    @Override
    public User getLoginUser(String UserCode) {
        String sql = "select * from smbms_user where userCode=?";
        Object[] params = {UserCode};
        PreparedStatement preparedStatement = null;
        ResultSet resultSet = null;

        User loginUser = userDao.getLoginUser(connection, preparedStatement, resultSet, sql, params);
        BaseDao.closeResource(null, preparedStatement, resultSet);
        return loginUser;
    }

    @Override
    public boolean updateUserPwd(int id, String pwd) {
        PreparedStatement preparedStatement = null;
        int i = userDao.updataUserPwd(connection, preparedStatement, id, pwd);
        Boolean flag = false;
        if (i > 0) {
            flag = true;
        }
        BaseDao.closeResource(null, preparedStatement, null);
        return flag;
    }
}

UserServlet.java

package com.kuang.servlet;

import com.kuang.pojo.User;
import com.kuang.service.UserService;
import com.kuang.service.UserServiceImpl;
import com.kuang.utils.Constants;
import com.mysql.jdbc.StringUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 功能描述
 *
 * @since 2022-09-07
 */
public class UserServlet extends HttpServlet {
    private static final long serialVersionUID = 4477827924112311146L;

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        updatePwd(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }

    public void updatePwd(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        Object o = req.getSession().getAttribute(Constants.USER_SESSION);
        String newPwd = req.getParameter("newpassword");
        if (o != null && !StringUtils.isNullOrEmpty(newPwd)) {
            User user = (User) o;
            UserService userService = new UserServiceImpl();
            boolean flag = userService.updateUserPwd(user.getId(), newPwd);
            if (flag) {
                req.setAttribute(Constants.MESSAGE, "修改成功，请重新登录");
                // 需移除当前Session
                req.getSession().removeAttribute(Constants.USER_SESSION);

            } else {
                req.setAttribute(Constants.MESSAGE, "修改失败");

            }
        } else {
            req.setAttribute(Constants.MESSAGE, "新密码有问题");

        }
        req.getRequestDispatcher("/jsp/pwdmodify.jsp").forward(req, resp);
    }
}

web.xml

<servlet>
    <servlet-name>user</servlet-name>
    <servlet-class>com.kuang.servlet.UserServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>user</servlet-name>
    <url-pattern>/jsp/user.do</url-pattern>
</servlet-mapping>

遗留

UserServlet.java这个文件中最后使用转发的方式转发到当前的密码修改页面，将返回的修改成功或失败的消息以cookie的方式塞回给req,前端页面接收这个而消息并显示，没有找到是在哪里实现的。