多亏了Chrome> = 21，现在才有可能。
function traverseFileTree(item, path) { path = path || ""; if (item.isFile) { // Get file item.file(function(file) { console.log("File:", path + file.name); }); } else if (item.isDirectory) { // Get folder contents var dirReader = item.createReader(); dirReader.readEntries(function(entries) { for (var i=0; i<entries.length; i++) { traverseFileTree(entries[i], path + item.name + "/"); } }); }}dropArea.addEventListener("drop", function(event) { event.preventDefault(); var items = event.dataTransfer.items; for (var i=0; i<items.length; i++) { // webkitGetAsEntry is where the magic happens var item = items[i].webkitGetAsEntry(); if (item) { traverseFileTree(item); } }}, false);
