java JDBC连接MYSQL链接数据库代码详解

1.源代码

package mysqldatabase;

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

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;

public class database {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("你好！");
        try {
            Class.forName("com.mysql.jdbc.Driver");
            System.out.println("成功加载sql驱动");
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            System.out.println("找不到sql驱动");
            e.printStackTrace();
        }
        String url="jdbc:mysql://localhost:3306/test";   
        Connection conn;
        try {

 /**
             * "jdbc:mysql://我的ip地址/我要访问的数据库","用户名", "密码"

**/

            conn = (Connection) DriverManager.getConnection(url,    "root","0000");
            //创建一个Statement对象
            Statement stmt = (Statement) conn.createStatement(); //创建Statement对象
            System.out.print("成功连接到数据库！");
            System.out.println(conn);
            ResultSet rs = stmt.executeQuery("select * from student");
            //user 为你表的名称
            System.out.println(rs.toString());
            while (rs.next()) {
                System.out.println(rs.getString("sname"));
            }

            stmt.close();
            conn.close();
        } catch (SQLException e){
            System.out.println("fail to connect the database!");
            e.printStackTrace();
        }

    }

}

2.mysql数据库配置

​​​​​​​​​​​​​​

3.eclipse运行结果