数据库
java代码
先导入相应的jdbc的jar包
import java.sql.*;
public class Test {
public static void main(String[] args) throws ClassNotFoundException, SQLException {
//1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
//2.连接成功,数据库对象 Connection代表数据库
//url末尾高版本可加&useSSL=true,低版本没有,否则会报错
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=utf8",
"root", "123456");
//3.执行sql对象 Statement 执行sql对象
Statement st = conn.createStatement();
//4.执行sql的对象
String sql = "select * from user";//增删改查修改这行即可
ResultSet rs = st.executeQuery(sql);//增删改用executeUpdate,查用executeQuery
while (rs.next()){
System.out.println("id = " + rs.getInt("id"));
System.out.println("name = " + rs.getString("name"));
System.out.println("pwd = " + rs.getString("password"));
System.out.println("email = " + rs.getString("email"));
System.out.println("birthday = " + rs.getDate("birthday"));
}
//5.释放连接
rs.close();
st.close();
conn.close();
}
}