简单的Lua 连接操作mysql数据库的方法_Lua

简单的Lua 连接操作mysql数据库的方法

win 需要先安装luaforwindows
linux 需要安装 luarocks 并 luarocks install luasql-mysql

require"luasql.mysql"
 
--创建环境对象
env=luasql.mysql()
 
--连接数据库
conn=env:connect("数据库名","用户名","密码","ip地址",端口)
 
--设置数据库的编码格式
conn:execute"set names gb2312"
 
--执行数据库操作
cur=conn:execute("select * from role")
 
row=cur:fetch({},"a")
 
while row do
var=string.format("%d%s\n",row.id,row.name)
 
print(var)
 
row=cur:fetch(row,"a")
end
 
conn:close()--关闭数据库连接
env:close()--关闭数据库环境

上面是个简单的，我们再来看个稍微复杂些的例子

-- load driver 
require "luasql.mysql" 
-- create environment object 
env = assert (luasql.mysql()) 
-- connect to data source 
con = assert (env:connect("database", "usr", "password", "192.168.xx.xxx", 3306)) 
-- reset our table 
res = con:execute"drop table people"        --建立新表people 
res = assert (con:execute[[ 
create table people(        
  name varchar(50), 
  email varchar(50) 
) 
]]) 
-- add a few elements 
list = { 
{ name="jose das couves", email="jose@couves.com", }, 
{ name="manoel joaquim", email="manoel.joaquim@cafundo.com", }, 
{ name="maria das dores", email="maria@dores.com", }, 
} 
for i, p in pairs (list) do                      --加入数据到people表 
res = assert (con:execute(string.format([[ 
  insert into people                      
  values ('%s', '%s')]], p.name, p.email) 
)) 
end 
-- retrieve a cursor 
cur = assert (con:execute"select name, email from people")  --获取数据 
-- print all rows 
row = cur:fetch ({}, "a") -- the rows will be indexed by field names  --显示出来 
while row do 
print(string.format("name: %s, e-mail: %s", row.name, row.email)) 
row = cur:fetch (row, "a") -- reusing the table of results 
end 
-- close everything 
cur:close() 
con:close() 
env:close()