dljd_003_jdbc概述

佚名 6年前 (2019-04-20) 随笔 673人围观抢沙发百度已收录

一、概述

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二、java连接数据库

　　2.1数据库设计

create database jdbc;
use jdbc;

create table test(
id int primary key auto_increment,
name varchar(10)
);

insert into test values(1,"name1");
insert into test values(2,"name2");
insert into test values(3,"name3");
insert into test values(4,"name4");
insert into test values(5,"name5");

　　2.2java连接数据库实现类

package edu.aeon.jdbc;

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

/**
 * [说明]:连接数据库
 * @author aeon(qq:1584875179)
 *
 */
public class Test {
    public static void main(String[] args) {
        try {
            Driver driver=new com.mysql.jdbc.Driver();
            DriverManager.registerDriver(driver);
            String url="jdbc:mysql://localhost:3306/jdbc";
            String username="root";
            String password="root";
            Connection connection=DriverManager.getConnection(url, username, password);
            Statement statement=connection.createStatement();
            String sql="select* from test";
            ResultSet resultSet=statement.executeQuery(sql);
            while(resultSet.next()){
                int id=resultSet.getInt("id");
                String name=resultSet.getString("name");
                System.out.println(id+"\t"+name);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}