Ruby实践—连接Mysql

安装环境：

OS：Windows XP

Ruby: Ruby1.9.1

Mysql: Mysql5.1.46 （username/password: root/root  port:3306）

Ruby-Mysql Driver: mysql-2.8.1-x86-mswin32.gem

（注：用2.7.3版本的驱动在测试时会出现 require"mysql"，找不到指定模块

IDE：RubyMine2.0.1

安装Ruby,RubyMine,Mysql的事项在这里就不多说了，提一下安装驱动的步骤

1）在Mysql安装目录的 bin 目录下，找到 ibmySQL.dll ，将该文件复制到 Ruby 安装目录的 bin 目录中

2）http://rubyforge.org/frs/?group_id=1598，下载 mysql-2.8.1-x86-mswin32.gem，这是 mysql_Ruby驱动程序。

       命令行，进入该文件所在目录，运行　gem install mysql-2.8.1-x86-mswin32.gem ，安装成功即可。

创建Ruby测试类

MysqlTest.rb

class MysqlTest
  #Code here
  require "mysql"
  def testMysql
    dbc=Mysql.real_connect('localhost','root','root','mysql')
    res=dbc.query('select * from user')
    puts "Test Mysql...."
    while row=res.fetch_row do
      puts "#{row[0]}"
    end
  end
  def createTable
      dbc=Mysql.real_connect('localhost','root','root','test')
      dbc.query("drop table if exists cux_users")
      dbc.query("create table cux_users(id int,name char(20))")
      dbc.query("insert into cux_users values(1,'Tom')")
      printf "Create Table........"
      printf "%d rows were inserted/n",dbc.affected_rows
      res = dbc.query("SELECT name FROM cux_users")    
      puts "===Select Data===/n"
      while row = res.fetch_row do
      printf "%s, %s/n", row[0], row[1]
      end
      puts "==================/n"
      puts "Server version: " + dbc.get_server_info
     rescue Mysql::Error => e
     puts "Error code: #{e.errno}"
     puts "Error message: #{e.error}"
     puts "Error SQLSTATE: #{e.sqlstate}" if e.respond_to?("sqlstate")    
    ensure
      puts "Close Connection......."
      dbc.close if dbc    
  end
  (MysqlTest.new).testMysql
  (MysqlTest.new).createTable
end

测试结果：

C:/Ruby19/bin/ruby.exe -e STDOUT.sync=true;STDERR.sync=true;load($0=ARGV.shift) E:/Ruby/Test/com.crystal/mysql_test.rb
Test Mysql....
localhost
Create Table........1 rows were inserted
===Select Data===
Tom,
==================
Server version: 5.1.46-community
Close Connection.......

Process finished with exit code 0

查看数据库test