驱动部分:
到官网下载mysql-connector-java-8.0.21
在project下创建一个lib文件夹,拖入mysql-connector-java-8.0.21.jar
并且右击lib点击Add as Library...
命令部分:
1. 1. 1. 驱动加载
Class.forName("com.mysql.cj.jdbc.Driver");
2. 2. 2. URL和用户信息
String url = "jdbc:mysql://localhost:3306/databaseName?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true";
String username = "root";
String password = "123456";
3. 3. 3. 建立连接
Connection connection = DriverManager.getConnection(url, username, password);
4. 4. 4. 执行sql对象
执行你要查询的表的语句
Statement statement = connection.createStatement();
5. 5. 5. 结果集获取
String sql = "select * from manager";
ResultSet resultSet = statement.executeQuery(sql);
6. 6. 6. 关闭所有连接
resultSet.close();
statement.close();
connection.close();