Tutoriel Lua
/ Lua 數(shù)據(jù)庫(kù)訪問(wèn)
Lua 數(shù)據(jù)庫(kù)訪問(wèn)
本文主要為大家介紹 Lua 數(shù)據(jù)庫(kù)的操作庫(kù):LuaSQL。他是開源的,支持的數(shù)據(jù)庫(kù)有:ODBC, ADO, Oracle, MySQL, SQLite 和 PostgreSQL。
本文為大家介紹MySQL的數(shù)據(jù)庫(kù)連接。
LuaSQL 可以使用 LuaRocks 來(lái)安裝可以根據(jù)需要安裝你需要的數(shù)據(jù)庫(kù)驅(qū)動(dòng)。
LuaRocks 安裝方法:
$ wget http://luarocks.org/releases/luarocks-2.2.1.tar.gz $ tar zxpf luarocks-2.2.1.tar.gz $ cd luarocks-2.2.1 $ ./configure; sudo make bootstrap $ sudo luarocks install luasocket $ lua Lua 5.3.0 Copyright (C) 1994-2015 Lua.org, PUC-Rio > require "socket"
Window 下安裝 LuaRocks:https://github.com/keplerproject/luarocks/wiki/Installation-instructions-for-Windows
安裝不同數(shù)據(jù)庫(kù)驅(qū)動(dòng):
luarocks install luasql-sqlite3 luarocks install luasql-postgres luarocks install luasql-mysql luarocks install luasql-sqlite luarocks install luasql-odbc
你也可以使用源碼安裝方式,Lua Github 源碼地址:https://github.com/keplerproject/luasql
Lua 連接MySql 數(shù)據(jù)庫(kù):
require "luasql.mysql" --創(chuàng)建環(huán)境對(duì)象 env = luasql.mysql() --連接數(shù)據(jù)庫(kù) conn = env:connect("數(shù)據(jù)庫(kù)名","用戶名","密碼","IP地址",端口) --設(shè)置數(shù)據(jù)庫(kù)的編碼格式 conn:execute"SET NAMES UTF8" --執(zhí)行數(shù)據(jù)庫(kù)操作 cur = conn:execute("select * from role") row = cur:fetch({},"a") --文件對(duì)象的創(chuàng)建 file = io.open("role.txt","w+"); while row do var = string.format("%d %s\n", row.id, row.name) print(var) file:write(var) row = cur:fetch(row,"a") end file:close() --關(guān)閉文件對(duì)象 conn:close() --關(guān)閉數(shù)據(jù)庫(kù)連接 env:close() --關(guān)閉數(shù)據(jù)庫(kù)環(huán)境