Node.js与AngularJS结合multiparty实现多图片上传

npm install multiparty --save 
npm install fs --save 

const express = require('express')
const multiparty = require('multiparty');
const fs = require('fs');
const router = express.Router()；

router.post('/uploadImg', function (req, res,next) {

 //生成multiparty对象，并配置上传目标路径
 var form = new multiparty.Form({
 uploadDir: './public/uploads/',//路径需要对应自己的项目更改
 /*设置文件保存路径 */
 encoding: 'utf-8',
 /*编码设置 */
 maxFilesSize: 20000 * 1024 * 1024,
 /*设置文件最大值 20MB */
 keepExtensions: true,
 /*保留后缀*/
 });
 
 //上传处理
 form.parse(req, function(err, fields, files) {
  var filesTmp = JSON.stringify(files, null, 2);
  console.log(files);
  
  function isType(str) {
   if (str.indexOf('.') == -1) {
    return '-1';
   } else {
    var arr = str.split('.');
    return arr.pop();
   }
  }
  
  if (err) {
   console.log('parse error: ' + err);
  } else {
  var inputFile = files.image[0];
  var uploadedPath = inputFile.path;
  var type = isType(inputFile.originalFilename);
  /*var dstPath = './public/files/' + inputFile.originalFilename;//真实文件名*/
  var name = new Date().getTime() + '.' + type; /*以上传的时间戳命名*/
  var dstPath = './public/uploads/' + name; /*路径需要对应自己的项目更改*/
  console.log("type---------" + type);
  
  if (type == "jpg" || type == "png" || type == "exe") {
   console.log('可以上传');
   //重命名为真实文件名
   fs.rename(uploadedPath, dstPath, function(err) {
    if (err) {
     console.log('rename error: ' + err);
    } else {
     console.log('上传成功');
    }
   });
   res.writeHead(200, { 'content-type': 'text/plain;charset=utf-8' });
   var data = { "code": "1",'result_code':'SUCCESS', "msg": "上传成功", "results": [{ "name": name, "path": "uploads/" + name }] };
   console.log(JSON.stringify(data))
   res.end(JSON.stringify(data));
   
   } else {
    fs.unlink(uploadedPath, function(err) {
    if (err) {
    return console.error(err);
    }
    console.log("文件删除成功！");
    });
    
    console.log('不能上传' + inputFile.originalFilename);
    res.writeHead(200, { 'content-type': 'text/plain;charset=utf-8' });
    var data = { "code": 0, "msg": "上传失败" };
    res.end(JSON.stringify(data));
   
   }
  }
  
 });

}); 

appIndex.controller('createImgs',function($rootScope,$scope,$http){
  // 图片上传

  $scope.reader = new FileReader();  //创建一个FileReader接口
  $scope.form = {   //用于绑定提交内容，图片或其他数据
    image:{},
  };
  $scope.thumb = {};   //用于存放图片的base64
  $scope.thumb_default = {  //用于循环默认的‘加号'添加图片的框
    1111:{}
  };

  $scope.img_upload = function(files) {    //单次提交图片的函数
    $scope.guid = (new Date()).valueOf();  //通过时间戳创建一个随机数，作为键名使用
    $scope.reader.readAsDataURL(files[0]); //FileReader的方法，把图片转成base64
    $scope.reader.onload = function(ev) {
      $scope.$apply(function(){
        $scope.thumb[$scope.guid] = {
          imgSrc : ev.target.result, //接收base64
        }
      });
    };
    
    var data = new FormData();   //以下为像后台提交图片数据
    data.append('image', files[0]);
    data.append('guid',$scope.guid);
    $http({
      method: 'post',
      url: '/uploadImg',
      data:data,
      headers: {'Content-Type': undefined},
      transformRequest: angular.identity
    }).then(function successCallBack(response) {
      if (response.data.result_code == 'SUCCESS') {
        $scope.form.image[$scope.guid] = response.data.results[0].path;
        $scope.thumb[$scope.guid].status = 'SUCCESS';
        console.log($scope.form)
      }
      if(data.result_code == 'FAIL'){
        console.log(data)
      }
    }, function errorCallback(response) {
      console.log('网络错误')
    })
  };

  $scope.img_del = function(key) {  //删除，删除的时候thumb和form里面的图片数据都要删除，避免提交不必要的
    var guidArr = [];
    for(var p in $scope.thumb){
      guidArr.push(p);
    }
    delete $scope.thumb[guidArr[key]];
    delete $scope.form.image[guidArr[key]];
  };
  $scope.submit_form = function(){  //图片选择完毕后的提交，这个提交并没有提交前面的图片数据，只是提交用户操作完毕后，到底要上传哪些，通过提交键名或者链接，后台来判断最终用户的选择,整个思路也是如此
    $http({
      method: 'post',
      url: '/insertImg',
      data:$scope.form,
    }).success(function(data) {
      console.log(data);  
    })
  };
 
 }) 

<div class="col-md-12 col-lg-7 fill">
  <div class="form-group">
    <h4>图片</h4>
    <p>支持批量上传，支持照片的格式为<span class="label label-default">jpg & png</span> 。每张照片请不要超过<span class="label label-default">50M</span> 。为了在全屏下获得最好的效果，照片的分辨率最好大于<span class="label label-default">1920 x 1280</span> 。上传后的照片默认会按照它们的EXIF日期来排序。</p>
    <div ng-repeat="item in thumb_default">
      <!-- 这里之所以写个循环，是为了后期万一需要多个‘加号'框 -->
      <label for="one-input">
        <div class="add">
          <span></span>
          <span></span>
        </div>
      </label>
      <input type="file" id="one-input" accept="image/*" file-model="images" onchange="angular.element(this).scope().img_upload(this.files)"/>
    </div>
  </div>
  <div class="hr-text hr-text-left m-b-1 m-t-1">
    <h6 class="text-white">
      <strong>已上传</strong>
    </h6>
  </div>
  <div ng-repeat="item in thumb" class="imgload">
  <!-- 采用angular循环的方式，对存入thumb的图片进行展示 -->
    <label>
      ![]({{item.imgSrc}})
    </label>
    <div class="imgDel">
      <span ng-if="item.imgSrc" ng-click="img_del($index)" class="glyphicon glyphicon-remove"></span>
    </div>
    
  </div>
  
</div> 

.fill .form-group label .add{
  border:1px solid #666;
  width: 100px;
  height: 100px;
  position: relative;
  cursor: pointer;
}
.fill .form-group label .add span:nth-of-type(1){
  width: 2px;
  height: 50px;
  display: block;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-top: -25px;
  margin-left: -1px;
  background: #666;
}
.fill .form-group label .add span:nth-of-type(2){
  background: #666;
  width: 50px;
  height: 2px;
  display: block;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-top: -1px;
  margin-left: -25px;
}
.fill .form-group input{
  display: none;
}
.fill .imgload{
  display: inline-block;
  margin: 7px;
  position: relative;
}
.fill .imgload label img{
  width: 200px;
  height: 200px;
}
.fill .imgload .imgDel{
  width:20px;
  height: 20px;
  background: #666;
  border-radius: 50%;
  position: absolute;
  right: -10px;
  top: -10px;
  color: #ccc;
  text-align: center;
  line-height: 20px;
  cursor: pointer;
}