2020.04.18 登录案例UserDao

Posted 2021-02-28 aojie

package com.aojie.dao;

import com.aojie.Util.JDBCUtils;
import com.aojie.domain.User;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

/**
 * @author aojie
 * @fuction 操作数据库中user表的类
 * @create 2020-04-18 20:05
 */
public class UserDao {
    //声明JDBCTemplate对象共用
    private JdbcTemplate jdbcTemplate=new JdbcTemplate(JDBCUtils.getDatasource());

    /**
     * 登录方法
     * @param user
     * @return
     */
    public User login(User user){
        try {
            //编写sql语句
            String sql="select * from user where username=? and password=?";
            User user1 = jdbcTemplate.queryForObject(sql, new BeanPropertyRowMapper<User>(User.class),
                    user.getUsername(), user.getPassword());
            return user1;
        } catch (DataAccessException e) {
            return null;
        }
    }
}