jscript读写二进制文件的方法

jscript读写二进制文件的方法

这篇文章主要介绍了jscript读写二进制文件的方法,涉及javascript中ActiveXObject对象的使用技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了jscript读写二进制文件的方法。分享给大家供大家参考。具体实现方法如下：

var bin = new Array(256);

for(var i=0;i<256;i++){

bin[i]=String.fromCharCode(i);

}

function TestWrite(){

var Stream = new ActiveXObject("ADODB.Stream");

var adTypeBinary=1,adTypeText=2;

Stream.Type = adTypeText;

Stream.CharSet = "iso-8859-1";

Stream.Open();

//Stream.WriteText("\x00\x01\x02\xff\xff");

for(var i=0;i<256;i++){

Stream.WriteText(String.fromCharCode(i));

//Stream.WriteText(bin[i]);

}

Stream.SaveToFile("c:\\windows\\temp\\test.bin", 2);

Stream.Close();

Stream = null;

}

function BinaryFile(filepath){

var adTypeBinary=1,adTypeText=2;

var adSaveCreateNotExist=1,adSaveCreateOverWrite=2;

var adReadAll=-1,adReadLine=-2;

this.path=filepath;

this.WriteAll = function(content){

var Stream = new ActiveXObject("ADODB.Stream");

Stream.Type = adTypeText;

Stream.CharSet = "iso-8859-1";

Stream.Open();

Stream.WriteText(content);

Stream.SaveToFile(this.path, adSaveCreateOverWrite);

Stream.Close();

Stream = null;

}

this.ReadAll = function(){

var Stream = new ActiveXObject("ADODB.Stream");

Stream.Type = adTypeText;

Stream.CharSet = "iso-8859-1";

Stream.Open();

Stream.LoadFromFile(this.path);

var content = Stream.ReadText(adReadAll);

Stream.Close();

Stream = null;

return content;

}

}

用法示例如下：

var crFolder = 'C:/Temp/cr'

var bf1=new BinaryFile(crFolder+"/PCDV0026.JPG");

var bf2=new BinaryFile(crFolder+"/PCDV0026_.JPG");

bf2.WriteAll(bf1.ReadAll());

希望本文所述对大家的javascript程序设计有所帮助。

更多信息请查看IT技术专栏