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我想将文本文件从一个文件夹复制到另一个文件夹。问题一旦你选择文件夹保存到什么是正确的代码来获取文件复制到该文件夹？我和使用NSI文件选择器modeOpen和modeSave，并找不到任何关于如何正确保存文件的代码。 MDN缺乏代码。任何人都知道如何正确使用nsIFilePicker？
var dispdir = Components.classes["@mozilla.org/file/directory_service;1"].
getService(Components.interfaces.nsIProperties).
get("ProfD", Components.interfaces.nsIFile);
var nsIFilePicker = Components.interfaces.nsIFilePicker;
var fp = Components.classes["@mozilla.org/filepicker;1"]
.createInstance(nsIFilePicker);
fp.init(window, "Select a File", nsIFilePicker.modeOpen);
fp.appendFilters(nsIFilePicker.filterText);
fp.displayDirectory = dispdir;
var rv = fp.show();
if (rv == nsIFilePicker.returnOK || rv == nsIFilePicker.returnCancel) {
var file = fp.file;
var path = fp.file.path;
}
var savedir = Components.classes["@mozilla.org/file/directory_service;1"].
getService(Components.interfaces.nsIProperties).
get("ProfD", Components.interfaces.nsIFile);
savedir.append("Test Folder");
if(!savedir.exists() || !savedir.isDirectory()) {
// if it doesn't exist,create
savedir.create(Components.interfaces.nsIFile.DIRECTORY_TYPE, 0777);
alert(savedir.path + "\n" + "Folder was made");
}
var fp2 = Components.classes["@mozilla.org/filepicker;1"]
.createInstance(nsIFilePicker);
fp2.init(window, "Save file to?", nsIFilePicker.modeSave);
fp2.appendFilters(nsIFilePicker.filterText);
fp2.displayDirectory = savedir;
fp2.defaultString = fp.file.leafName;
var rv = fp2.show();
if (rv == nsIFilePicker.returnOK || rv == nsIFilePicker.returnReplace) {
}
var aDir = Components.classes["@mozilla.org/file/local;1"]
.createInstance(Components.interfaces.nsILocalFile);
aDir.append(fp2.file.parent.path);
alert(fp2.file.parent.path)
fp.file.copyTo(aDir, null);
copyFile(fp.file.path);
alert(fp2.file.path + "\n" + "File copied successfuly!")