创建数据库,创建用户并授权,建表给数据
create database test;
grant all privileges on test.* to tufujie@localhost identified by '123456';
use test;
create table user
(name varchar(30) primary key,
password varchar(30));
insert into user
values('tufujie','123456');
编写Java文件
package com.jef.sql;
import java.sql.Connection;
import java.sql.DriverManager;
public class ConnectionMySQL {
public static Connection getMySQLConnection() {
//声明Connection对象
Connection con;
//驱动程序名
String driver = "com.mysql.jdbc.Driver";
//URL指向要访问的数据库名test并声明编码格式
String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8";
//MySQL配置时的用户名
String user = "root";
//MySQL配置时的密码
String password = "root";
//遍历查询结果集
try {
// 1.加载(载入)驱动程序
Class.forName(driver);
// 2.得到连接(注册),连接MySQL数据库
con = DriverManager.getConnection(url, user, password);
// 或者采用下面这种方式也行
/*con = DriverManager
.getConnection("jdbc:mysql://localhost:3306/test?user=tufujie&password=123456&useUnicode=true&characterEnconding=UTF-8");*/
if (con != null && !con.isClosed()) {
System.out.println("数据库测试连接成功");
return con;
}
} catch (ClassNotFoundException e) {
//数据库驱动类异常处理
System.out.println("未找到驱动程序");
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
package com.jef.sql;
import java.sql.*;
//演示如何使用com.mysql.jdbc连接桥连接MySQL
public class JavaCtMySQL {
public static void main(String[] args) {
try {
Connection con = ConnectionMySQL.getMySQLConnection();
Statement sm = con.createStatement();
String sql = "select * from user";
// 3.跟sql server一模一样,创建statement对象,用来执行Sql语句
ResultSet rs = sm.executeQuery(sql);
while (rs.next()) {
// 获取用户名和密码
// 方式1,用下标的形式,从1开始
System.out.println("管理员名字:" + rs.getString(1) + "密码:" + rs.getString(2));
// 方式2,根据字段名称获取
System.out.println("管理员名字:" + rs.getString("name") + "密码:" + rs.getString("password"));
}
// 关闭打开的资源
rs.close();
sm.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}