示例为：对文件进行处理
将 xml报文格式的报文转为lua 去取值
如由 <khxm><name>姓名</name><value>123</value></khxm> 转为
this.hqzhxx_ccsz_name = body['hqzhxx']["ccsz"]['name'] or "";--持仓市值
txt1.txt文件内容如下：
<cpgg><name>产品规格</name><value>123克</value></cpgg>
<gmsl><name>购买数量</name><value>234个</value></gmsl>
<gmfe><name>购买份额</name><value>345克</value></gmfe>
转换后要的效果如下：
this.cpgg_name = body['cpgg']['name'] or '';--产品规格
this.cpgg_value = body['cpgg']['value'] or '';--产品规格
this.gmsl_name = body['gmsl']['name'] or '';--购买数量
this.gmsl_value = body['gmsl']['value'] or '';--购买数量
this.gmfe_name = body['gmfe']['name'] or '';--购买份额
this.gmfe_value = body['gmfe']['value'] or '';--购买份额
erl处理文件(file_change.erl)代码如下：
-module(file_change).
-export([process/2]).
%对文件进行处理
%将 xml报文格式的报文转为lua 去取值
%如由 <khxm><name>姓名</name><value>123</value></khxm> 转为
%this.hqzhxx_ccsz_name = body['hqzhxx']["ccsz"]['name'] or "";--持仓市值
process(FileIn, FileOut)->
{Status,Value} = file:open(FileIn,read),
if Status =:= ok ->
io:format("==== open successed ====!~n"),
Tokens = readFile(Value),%%读取文件并处理
io:format("file_value------~p ~n",[Tokens]),
file:write_file("./"++FileOut,[Tokens]),%%写文件
io:format("==== end ===!~n");
Status =/= ok ->
io:format("open file error!")
end.
readFile(Value) ->
readFile(Value,[]).
readFile(Value,ReturnList) ->
OneLine = io:get_line(Value,""),%一行一行读取文件
if
OneLine =:= eof -> %文件末尾标记 文件结束,关闭文件
io:format("acrss the file end! ~n"),
file:close(Value),
ReturnList;
OneLine =/= eof ->
Tokens = string:tokens(OneLine,"< > /> \n"),% 使用多个分隔符把字符串分割
Len = string:len(Tokens),%获取一个字符长度
if Len =:= 0 ->
io:format(" end to read ~n"),
file:close(Value),
ReturnList;
Len =/= 0 ->
%对一行的数据进行处理
io:format(" the line Value ~p~n",[OneLine]),
%<khxm><name>姓名</name><value>123</value></khxm>
%this.hqzhxx_ccsz_name = body['hqzhxx']["ccsz"]['name'] or "";--持仓市值
%%取出列表对应个数的值
Tokens_1 = lists:nth(1,Tokens),%
Tokens_2 = lists:nth(2,Tokens),%name
Tokens_3 = lists:nth(3,Tokens),%注解
Tokens_5 = lists:nth(5,Tokens),%value
%对字符串进行拼接
BB = "this." ++ Tokens_1 ++ "_" ++ Tokens_2,
BB2 = "this." ++ Tokens_1 ++ "_" ++ Tokens_5,
CC = "body['" ++ Tokens_1 ++"']['" ++Tokens_2++ "']",
CC2 = "body['" ++ Tokens_1 ++"']['" ++Tokens_5++ "']",
DD = " or '';--" ++Tokens_3,
EE = BB ++ " = " ++ CC ++ DD ++ "\n",
EE2 = BB2 ++ " = " ++ CC2 ++ DD ++ "\n",
GG =string:concat(EE,EE2),%将两个字符串列表拼接
% io:format(" the line Value BB ~p~n",[BB]),
% io:format(" the line Value BB2 ~p~n",[BB2]),
% io:format(" the line Value CC ~p~n",[CC]),
% io:format(" the line Value CC2 ~p~n",[CC2]),
% io:format(" the line Value DD ~p~n",[DD]),
% io:format(" the line Value EE ~p~n",[EE]),
% io:format(" the line Value EE2 ~p~n",[EE2]),
NewDic = string:concat(ReturnList,GG),
readFile(Value,NewDic)
end
end.
在erlang shell 输入如下：
7> c(file_change).
{ok,file_change}
8> file_change:process("./txt1.txt","txt3.txt").
==== open successed ====!
the line Value [60,99,112,103,103,62,60,110,97,109,101,62,228,186,167,229,
147,129,232,167,132,230,160,188,60,47,110,97,109,101,62,60,
118,97,108,117,101,62,49,50,51,229,133,139,60,47,118,97,108,
117,101,62,60,47,99,112,103,103,62,10]
the line Value [60,103,109,115,108,62,60,110,97,109,101,62,232,180,173,228,
185,176,230,149,176,233,135,143,60,47,110,97,109,101,62,60,
118,97,108,117,101,62,50,51,52,228,184,170,60,47,118,97,108,
117,101,62,60,47,103,109,115,108,62,10]
the line Value [60,103,109,102,101,62,60,110,97,109,101,62,232,180,173,228,
185,176,228,187,189,233,162,157,60,47,110,97,109,101,62,60,
118,97,108,117,101,62,51,52,53,229,133,139,60,47,118,97,108,
117,101,62,60,47,103,109,102,101,62]
acrss the file end!
file_value------[116,104,105,115,46,99,112,103,103,95,110,97,109,101,32,61,32,
98,111,100,121,91,39,99,112,103,103,39,93,91,39,110,97,109,
101,39,93,32,111,114,32,39,39,59,45,45,228,186,167,229,147,
129,232,167,132,230,160,188,10,116,104,105,115,46,99,112,103,
103,95,118,97,108,117,101,32,61,32,98,111,100,121,91,39,99,
112,103,103,39,93,91,39,118,97,108,117,101,39,93,32,111,114,
32,39,39,59,45,45,228,186,167,229,147,129,232,167,132,230,
160,188,10,116,104,105,115,46,103,109,115,108,95,110,97,109,
101,32,61,32,98,111,100,121,91,39,103,109,115,108,39,93,91,
39,110,97,109,101,39,93,32,111,114,32,39,39,59,45,45,232,180,
173,228,185,176,230,149,176,233,135,143,10,116,104,105,115,
46,103,109,115,108,95,118,97,108,117,101,32,61,32,98,111,100,
121,91,39,103,109,115,108,39,93,91,39,118,97,108,117,101,39,
93,32,111,114,32,39,39,59,45,45,232,180,173,228,185,176,230,
149,176,233,135,143,10,116,104,105,115,46,103,109,102,101,95,
110,97,109,101,32,61,32,98,111,100,121,91,39,103,109,102,101,
39,93,91,39,110,97,109,101,39,93,32,111,114,32,39,39,59,45,
45,232,180,173,228,185,176,228,187,189,233,162,157,10,116,
104,105,115,46,103,109,102,101,95,118,97,108,117,101,32,61,
32,98,111,100,121,91,39,103,109,102,101,39,93,91,39,118,97,
108,117,101,39,93,32,111,114,32,39,39,59,45,45,232,180,173,
228,185,176,228,187,189,233,162,157,10]
==== end ===!
ok
9>
注：本示例txt1.txt 和txt3.txt 都在file_change.erl同级目录
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