手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar
作者:mmseoamin日期:2023-12-25

第一步:下载mysql驱动包

 1、mysql官网:https://dev.mysql.com/downloads/connector/j/

下载Connector/J (JAVA使用)如下图所示

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第1张

2、此时会进入下载页面,无需登录,直接下载即可,如下图所示:

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第2张

3、mysql-connector-j-8.0.32.zip下载成功,里面含有mysql-connector-j-8.0.32.jar文件,后续使用。

 手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第3张

 第二步:在JAVA项目中新建lib文件夹,将mysql-connector-j-8.0.32.jar放进去,右击lib文件夹,选择“添加到库”;

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第4张

 第三步:编写连接MYSQL的类文件,示例如下:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class ConnMySql {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        try (
                Connection conn = DriverManager.getConnection(
                        "jdbc:mysql://127.0.0.1:3306/xyytest",
                        "root",
                        "HUawei123");
                Statement stmt = conn.createStatement();
                ResultSet rs = stmt.executeQuery("select *"
                        + " from employees"
                        + " where department_id in ('10','20','30')")) {
            while (rs.next()) {
                System.out.println(rs.getInt(1) + "\t"
                        + rs.getString(2) + "\t"
                        + rs.getString(3) + "\t"
                        + rs.getString(4) + "\t"
                        + rs.getString(5));
            }
        }
    }
}

运行时应该会报错:

 Access denied for user ''root@'localhost' (using password: YES)

第四步:修改my.ini文件,在[mysqlid] 下面添加一句 skip-grant-tables,这个是为了跳过登陆的,不用密码也能进mysql。

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第5张

 登录mysql服务器,

先输入:flush privileges;

再输入:ALTER USER 'root'@'localhost' IDENTIFIED BY '密码';

如下图:

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第6张

 第五步:重下运行java程序即可

手把手教你JAVA如何连接MYSQL-mysql-connector-j-8.0.32.jar,第7张