在lua中使用json库容易遇到的问题

来源：互联网发布：俄语配音软件编辑：程序博客网时间：2024/06/05 19:05

现在有在lua里直接解析json的纯lua库，使得解析json很方便，尤其是在lua接入网络协议，读取本地配置尤为重要，但目前使用下来，存在一些问题。

使用的json库为网上的流行的开源json库，并且是cocos原生附带的json库，如下：

    -----------------------------------------------------------------------------    -- JSON4Lua: JSON encoding / decoding support for the Lua language.    -- json Module.    -- Author: Craig Mason-Jones    -- Homepage: http://json.luaforge.net/    -- Version: 0.9.40    -- This module is released under the MIT License (MIT).    -- Please see LICENCE.txt for details.

首先，lua本身不能识别\u83b7\u53d6\u6210\u529f这类unicode串，其次，lua也不支持解析”\/”这类转译，需要手动处理。

1.处理unicode的中文编码

--解析unicode编码的中文local bit = require("bit")local function unicode_to_utf8(convertStr)    if base.type(convertStr)~="string" then        return convertStr    end    local resultStr = ""    local i = 1    while true do        local unicode        local num1 = string.byte(convertStr,i)        if num1 ~= nil and string.sub(convertStr,i,i+1) == "\\u" then            unicode = base.tonumber("0x"..string.sub(convertStr,i+2,i+5))            i= i+6        elseif num1~=nil then            unicode = num1            i= i+1        else            break        end        --base.print(unicode)        if unicode <= 0x007f then            resultStr = resultStr..string.char(bit.band(unicode,0x7f))        elseif unicode >= 0x0080 and unicode <= 0x07ff then            resultStr = resultStr..string.char(bit.bor(0xc0,bit.band(bit.rshift(unicode,6),0x1f)))            resultStr = resultStr..string.char(bit.bor(0x80,bit.band(unicode,0x3f)))        elseif unicode >= 0x0800 and unicode <= 0xffff then            resultStr = resultStr..string.char(bit.bor(0xe0,bit.band(bit.rshift(unicode,12),0x0f)))            resultStr = resultStr..string.char(bit.bor(0x80,bit.band(bit.rshift(unicode,6),0x3f)))            resultStr = resultStr..string.char(bit.bor(0x80,bit.band(unicode,0x3f)))        end    end    --base.print(resultStr)    return resultStr

end

local function utf8_to_unicode(convertStr)    if base.type(convertStr)~="string" then        return convertStr    end    local resultStr = ""    local i = 1    local num1 = string.byte(convertStr,i)    while num1 ~= nil do        --base.print(num1)        local tempVar1,tempVar2        if num1 >= 0x00 and num1 <= 0x7f then            tempVar1 = num1            tempVar2 = 0        elseif bit.band(num1,0xe0)== 0xc0 then            local t1 = 0            local t2 = 0            t1 = bit.band(num1,bit.rshift(0xff,3))            i = i+1            num1 = string.byte(convertStr,i)            t2 = bit.band(num1,bit.rshift(0xff,2))            tempVar1 = bit.bor(t2,bit.lshift(bit.band(t1,bit.rshift(0xff,6)),6))            tempVar2 = bit.rshift(t1,2)        elseif bit.band(num1,0xf0)== 0xe0 then            local t1 = 0            local t2 = 0            local t3 = 0            t1 = bit.band(num1,bit.rshift(0xff,3))            i = i+1            num1=string.byte(convertStr,i)            t2 = bit.band(num1,bit.rshift(0xff,2))            i = i+1            num1 = string.byte(convertStr,i)            t3 = bit.band(num1,bit.rshift(0xff,2))            tempVar1=bit.bor(bit.lshift(bit.band(t2,bit.rshift(0xff,6)),6),t3)            tempVar2=bit.bor(bit.lshift(t1,4),bit.rshift(t2,2))        end        resultStr = resultStr..string.format("\\u%02x%02x",tempVar2,tempVar1)        --base.print(resultStr)        i = i+1        num1 = string.byte(convertStr,i)    end    --base.print(resultStr)    return resultStrend

2.处理不能转译的\/字符

找到相应的串替换掉

0 0