1.添加jar包
官网下载,将mysql-connector-java版本号.jar包添加到lib下
2.加载驱动
//8.0以上
Class.forName("com.mysql.cj.jdbc.Driver");
//8.0以下
Class.forName("com.mysql.jdbc.Driver");
3.连接数据库
//8.0以上
url = "jdbc:mysql://localhost:3306/shop539?useSSL=false&serverTimezone=UTC";
//8.0以下
url = "jdbc:mysql://localhost:3306/shop539";
user = "root";
password = "密码";
Connection conn = DriverManager.getConnection(url,user,passward);
4.使用statement操作数据库
Statement st = conn.createStatement();
String sql = "select * from t_goods";
ResultSet rs = st.executeQuery(sql);
5.遍历rs
while (rs.next()){
System.out.println(rs.getString("itemname"));
}
6.关闭连接
rs.close();
st.close();
conn.close();