luaxml 确实好用，节点检索超方便

xml = require(‘LuaXml‘)

-- load XML data from file "test.xml" into local table xfile
local xfile = xml.load("test.xml")
print(type(xfile))
-- search for substatement having the tag "scene"
local xscene = xfile:find("id","id","5")
-- if this substatement is found
if xscene ~= nil then
  --  print it to screen
  print(xscene)
  --  print  tag, attribute id and first substatement
  print(xscene.id,xscene.buildLevel)
end

--xfile:save"t.xml"

print("---\nREADY.")

for i,node in pairs(xfile:find("root")) do
    print("tag is ",node.tag)
    if node.tag~=nil and node[node.tag]=="id" then
    print(node.id,node.buildLevel,node.upGrade)
    end
end

local f2 = xml.load("test2.xml")

local section = f2:find("section","id","0")

local difficulty=section:find("difficulty","id","1")

local level=difficulty:find("level","id","0")

print(level.point)