1.使用IDEA自带的Database模块就可以连接到数据库

2.选择数据库MYSQL并且连接到数据库

3.可以查看数据库和表，以及进行增删改等操作

4.导入驱动

配置pom.xml 导入mysql-connector-java:5.1.49

<dependencies>
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.49</version>
      </dependency>
      </dependencies>
      

5.使用JDBC操作数据库

package com.qzxiaofeng.jdbc;

import java.sql.*;

/**
 * @author 刘晓峰
 */
public class FirstJdbc1 {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/xiao?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai";
        PreparedStatement statement = null;
        ResultSet resultSet = null;
        Connection connection=null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            connection = DriverManager.getConnection(url,"root","123456");
            statement = connection.prepareStatement("select * from t_manager");
            resultSet = statement.executeQuery();
            while (resultSet.next()){
                System.out.println("id:"+resultSet.getInt("id"));
                System.out.println("username:"+resultSet.getString("username"));
                System.out.println("password:"+resultSet.getString("password"));
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
        finally {
            if(null!=resultSet){
                try {
                    resultSet.close();
                } catch (SQLException exception) {
                    exception.printStackTrace();
                }
            }
            if(null!=statement){
                try {
                    statement.close();
                } catch (SQLException exception) {
                    exception.printStackTrace();
                }
            }
            if(null!=connection){
                try {
                    connection.close();
                } catch (SQLException exception) {
                    exception.printStackTrace();
                }
            }
        }

    }
}

6.程序执行结果，执行了一条查询语句

完结，加油！