The Magnificent JavaJava学习笔记

Java:jdbc连接数据库MariaDB/Mysql

2016-05-17  本文已影响5349人  HE1HE

这里是用的Mysql的分支版本MariaDB,除了安装的包不同外,操作基本相同。
本人用的是Archlinux,也只是安装软件的方式不同。

一、MariaDB

+ [安装](https://wiki.archlinux.org/index.php/Pacman)位于[官方软件源](https://wiki.archlinux.org/index.php/Official_repositories)的[mariadb](https://www.archlinux.org/packages/?name=mariadb)、[libmariadbclient](https://www.archlinux.org/packages/?name=libmariadbclient) 和 [mariadb-clients](https://www.archlinux.org/packages/?name=mariadb-clients)
+ 运行: 
# mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
+ 启动 mysqld[守护进程](https://wiki.archlinux.org/index.php/Daemon),运行安装脚本,然后重新启动守护进程:(按提示设置MariaDB用户名和密码)
# systemctl start mysqld
# mysql_secure_installation
# systemctl restart mysqld
  • 启动、登录,建立数据库
# systemctl start mysqld
$ mysql -p -u root
MariaDB [(none)]> create database test;

二、eclipse建立测试项目

用户名和密码设为自己的。

package test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
public class MariaDB {
    // The JDBC Connector Class.
    private static final String dbClassName = "org.mariadb.jdbc.Driver";
    // Connection string. emotherearth is the database the program
    // is connecting to. You can include user and password after this
    // by adding (say) ?user=paulr&password=paulr. Not recommended!
    private static final String CONNECTION =
                          "jdbc:mariadb://localhost:3306/emotherearth";
    public static void main(String[] args) throws
                             ClassNotFoundException,SQLException
    {
        System.out.println(dbClassName);
        // Class.forName(xxx) loads the jdbc classes and
        // creates a drivermanager class factory
        Class.forName(dbClassName);
        // Properties for user and password. Here the user and password are both 'paulr'
        Properties p = new Properties();
        p.put("user","root");
        p.put("password","123456");
        // Now try to connect
        Connection c = DriverManager.getConnection(CONNECTION,p);
        System.out.println("It works !");
        c.close();
    }
}

二、jdbc连接器

方法一:

方法二: 安装包 mariadb-jdbcAUR

$ yaourt mariadb-jdbc

要确保项目里有了Mariadb-Java-Client.jar

三、运行测试

此时运行测试程序,得到:

org.mariadb.jdbc.Driver
It works !
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