diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 0ca9404..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,25 +0,0 @@
-### intellij ###
-*.iml
-*.ipr
-*.iws
-.idea/
-
-### node ###
-lib-cov
-*.seed
-*.log
-*.csv
-*.dat
-*.out
-*.pid
-*.gz
-
-pids
-logs
-results
-
-npm-debug.log
-node_modules
-
-### example ###
-public/lib/
\ No newline at end of file
diff --git a/lib/uploadhandler.js b/lib/uploadhandler.js
index 070f018..0007593 100644
--- a/lib/uploadhandler.js
+++ b/lib/uploadhandler.js
@@ -6,9 +6,10 @@ var EventEmitter = require('events').EventEmitter,
     mkdirp = require('mkdirp'),
     _ = require('lodash'),
     async = require('async');
+    crypto = require('crypto');
+var doNothing=function(){};
 
 module.exports = function (options) {
-
     var FileInfo = require('./fileinfo')(
         _.extend({
             baseDir: options.uploadDir
@@ -63,6 +64,10 @@ module.exports = function (options) {
         }, this));
     };
 
+    var isFileExist = function (filePath) {
+        return fs.existsSync(filePath);
+    }
+
     UploadHandler.prototype.post = function () {
         var self = this,
             form = new formidable.IncomingForm(),
@@ -88,6 +93,7 @@ module.exports = function (options) {
         this.noCache();
 
         form.uploadDir = options.tmpDir;
+        form.hash = "sha1";
         form
             .on('fileBegin', function (name, file) {
                 tmpFiles.push(file.path);
@@ -127,7 +133,7 @@ module.exports = function (options) {
                                         imageMagick.resize({
                                             width: opts.width,
                                             height: opts.height,
-                                            srcPath: options.uploadDir() + '/' + fileInfo.name,
+                                            srcPath: options.uploadDir() + '/' + fileInfo.fileDir + '/' + fileInfo.name,
                                             dstPath: options.uploadDir() + '/' + version + '/' + fileInfo.name,
                                             customArgs: opts.imageArgs || ['-auto-orient']
                                         }, finish);
@@ -137,22 +143,40 @@ module.exports = function (options) {
                         }
 
                         mkdirp(options.uploadDir() + '/', function(err, made) {
-                            fs.rename(file.path, options.uploadDir() + '/' + fileInfo.name, function (err) {
-                                if (!err) {
-                                    generatePreviews();
-                                    finish();
-                                } else {
-                                    var is = fs.createReadStream(file.path);
-                                    var os = fs.createWriteStream(options.uploadDir() + '/' + fileInfo.name);
-                                    is.on('end', function (err) {
-                                        if (!err) {
-                                            fs.unlink(file.path);
-                                            generatePreviews();
-                                        }
+                            //文件后缀
+                            const fileSuffix = fileInfo.name.substring(fileInfo.name.lastIndexOf('.'));
+                            const fileName = file.hash + fileSuffix;
+                            //子目录
+                            const fileDir = fileName.substring(0,2);
+                            const filePath = path.join(fileDir+fileName);
+                            fileInfo.fileDir = fileDir;
+                            fileInfo.name = fileName;
+                            const isExist = isFileExist(filePath);
+
+                            if(isExist) {
+                                finish();
+                                return;
+                            }
+
+                            mkdirp(path.join(options.uploadDir(),fileDir), function(err, made_1) {
+                                const new_path = path.join(options.uploadDir(),fileDir,fileName);
+                                fs.rename(file.path, new_path, function (err) {
+                                    if (!err) {
+                                        generatePreviews();
                                         finish();
-                                    });
-                                    is.pipe(os);
-                                }
+                                    } else {
+                                        var is = fs.createReadStream(file.path);
+                                        var os = fs.createWriteStream(new_path);
+                                        is.on('end', function (err) {
+                                            if (!err) {
+                                                fs.unlink(file.path);
+                                                generatePreviews();
+                                            }
+                                            finish();
+                                        });
+                                        is.pipe(os);
+                                    }
+                                });
                             });
                         });
                     }
@@ -189,7 +213,7 @@ module.exports = function (options) {
         }
         fs.unlink(filepath, function (ex) {
             _.each(options.imageVersions, function (value, version) {
-                fs.unlink(path.join(options.uploadDir(), version, fileName));
+                fs.unlink(path.join(options.uploadDir(), version, fileName), doNothing);
             });
             self.emit('delete', fileName);
             self.callback({success: !ex});
@@ -198,8 +222,8 @@ module.exports = function (options) {
 
     UploadHandler.prototype.initUrls = function (fileInfo, cb) {
         var baseUrl = (options.ssl ? 'https:' : 'http:') + '//' + (options.hostname || this.req.get('Host'));
-        fileInfo.setUrl(null, baseUrl + options.uploadUrl());
-        fileInfo.setUrl('delete', baseUrl + this.req.originalUrl);
+        fileInfo.setUrl(null, baseUrl + options.uploadUrl() + '/' + fileInfo.fileDir);
+        fileInfo.setUrl('delete', baseUrl + this.req.originalUrl + '/' + fileInfo.fileDir);
         async.each(Object.keys(options.imageVersions), function(version, cb) {
             fs.exists(options.uploadDir() + '/' + version + '/' + fileInfo.name, function(exists) {
                 if (exists) fileInfo.setUrl(version, baseUrl + options.uploadUrl() + '/' + version);
diff --git a/package.json b/package.json
index dc11e0c..3cbafe5 100644
--- a/package.json
+++ b/package.json
@@ -1,34 +1,62 @@
 {
-  "name": "jquery-file-upload-middleware",
-  "author": "Aleksandr Guidrevitch <aguidrevitch@gmail.com>",
-  "description": "jQuery-File-Upload Express.js Middleware",
-  "keywords": [
-    "jquery",
-    "upload",
-    "express",
-    "middleware"
+  "_from": "github:fangj/jquery-file-upload-middleware",
+  "_id": "jquery-file-upload-middleware@0.1.7",
+  "_inBundle": false,
+  "_location": "/jquery-file-upload-middleware",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "git",
+    "raw": "jquery-file-upload-middleware@github:fangj/jquery-file-upload-middleware",
+    "name": "jquery-file-upload-middleware",
+    "escapedName": "jquery-file-upload-middleware",
+    "rawSpec": "github:fangj/jquery-file-upload-middleware",
+    "saveSpec": "github:fangj/jquery-file-upload-middleware",
+    "fetchSpec": null,
+    "gitCommittish": null
+  },
+  "_requiredBy": [
+    "/"
   ],
-  "version": "0.1.7",
+  "_resolved": "github:fangj/jquery-file-upload-middleware#999e430e5f207bc2ae8ded31b1b54d538cb95dab",
+  "_spec": "jquery-file-upload-middleware@github:fangj/jquery-file-upload-middleware",
+  "_where": "D:\\project\\lims_next_x1\\extra\\file_service",
+  "author": {
+    "name": "Aleksandr Guidrevitch",
+    "email": "aguidrevitch@gmail.com"
+  },
+  "bugs": {
+    "url": "https://github.com/aguidrevitch/jquery-file-upload-middleware/issues"
+  },
+  "bundleDependencies": false,
   "dependencies": {
+    "async": "*",
     "formidable": ">=1.0.11",
     "imagemagick": ">=0.1.2",
     "lodash": ">= 0.9.2",
-    "mkdirp": ">= 0.3.4",
-    "async": "*"
+    "mkdirp": ">= 0.3.4"
   },
+  "deprecated": false,
+  "description": "jQuery-File-Upload Express.js Middleware",
+  "devDependencies": {},
   "engines": {
     "node": ">= 0.8.8"
   },
+  "homepage": "https://github.com/aguidrevitch/jquery-file-upload-middleware#readme",
+  "keywords": [
+    "jquery",
+    "upload",
+    "express",
+    "middleware"
+  ],
+  "license": "MIT",
+  "main": "./index.js",
+  "name": "jquery-file-upload-middleware",
   "repository": {
     "type": "git",
     "url": "git://github.com/aguidrevitch/jquery-file-upload-middleware.git"
   },
-  "main": "./index.js",
-  "readmeFilename": "README.md",
-  "devDependencies": {},
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
-  "_id": "jquery-file-upload-middleware@0.1.7",
-  "license": "MIT"
+  "version": "0.1.7"
 }