Java实现JDBC连接数据库实例

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCTest {
    
    private static final String URL="jdbc:mysql://127.0.0.1:3306/student";
    private static final String USER="root";
    private static final String PASSWORD="root";

    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        
        //1.加载驱动程序
        Class.forName("com.mysql.jdbc.Driver");
        
        //2.获得数据连接
        Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);
        
        //3.使用数据库的连接创建声明
        Statement stmt = conn.createStatement();
        
        //4.使用声明执行SQL语句
        ResultSet rs = stmt.executeQuery("select * from stu");
        
        //5.读取数据库的信息
        while(rs.next()){
            String id = rs.getString("id");
            String name = rs.getString("name");
            String sex = rs.getString("sex");
            String score = rs.getString("score");
            System.out.println(id+"姓名："+name+"，性别："+sex+"，成绩："+score);
        }

    }
    
}