本文主要为大家介绍 Lua 数据库的操作库:
LuaSQL http://luaforge.net/projects/luasql/
他是开源的,支持的数据库有:ODBC, ADO, Oracle, MySQL, SQLite 和 PostgreSQL。
LuaSQL 可以使用
LuaRocks https://luarocks.org/
来安装可以根据需要安装你需要的数据库驱动。
LuaRocks 安装方法:
$ wget https://luarocks.org/releases/luarocks-2.4.1.tar.gz
$ tar zxpf luarocks-2.4.1.tar.gz
$ cd luarocks-2.4.1
$ ./configure; sudo make bootstrap
$ sudo luarocks install luasocket
$ lua
Lua 5.3.3 Copyright (C) 1994-2016 Lua.org, PUC-Rio
> require "socket"
通过LuaRocks安装mysql必要的驱动:
sudo luarocks install luasql-mysql MYSQL_INCDIR=/usr/include/mysql/
mysql = require "luasql.mysql"
--创建环境对象
local env = mysql.mysql()
--链接数据库
local conn = env:connect("dstorage", "root", "itcast")
print(env, conn)
print("----------")
--执行sql语句
cursor,errorString = conn:execute([[ select * from user]])
--遍历查询结果
row = cursor:fetch({}, "a")
while row do
print(string.format("Id:%s Name:%s", row.u_id, row.u_name))
row = cursor:fetch({}, "a")
end
--关闭链接句柄
conn:close()
env:close()
执行结果:
MySQL environment (0x16fb628) MySQL connection (0x16fc108)
----------
Id:1 Name:ace
Id:2 Name:shit
Id:3 Name:gailun
Id:4 Name:ben
Id:5 Name:akali
Id:6 Name:marong
Id:7 Name:123
Id:9 Name:songjj
Id:10 Name:a
Id:12 Name:guanyuhan
Id:14 Name:tt-y
Id:16 Name:1234
Id:17 Name:1111
Id:18 Name:mike
Id:19 Name:pipixia
Id:21 Name:qqq
Id:22 Name:123123
Id:23 Name:1110
Id:25 Name:he