最近项目中要做一个带进度条的上传文件的功能,学习了Ajax,使用起来比较方便,将几个方法实现就行。
前端引入文件
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css"> <script src="https://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://malsup.github.com/jquery.form.js"></script>
Ajax进度条异步处理
<script type="text/javascript"> $(function () { $("#myupload").ajaxForm({ dataType:'json', beforeSend:function(){ $(".progress").show(); }, uploadProgress:function(event,position,total,percentComplete){ var percentVal = percentComplete + '%'; $(".progress-bar").width(percentComplete + '%'); $(".progress-bar").html(percentVal); $(".sr-only").html(percentComplete + '%'); }, success:function(data){ $(".progress").hide(); if(data.error == "empty_name"){ alert("文件上传非法,上传失败!"); exit(); }; if(data.error == "large"){ alert("图片上传不能大于2M,上传失败!"); exit(); }; /*alert(data.error);*/ if(data.error == "format"){ alert("图片格式错误,上传失败"); //alert(data.type); exit(); }; //alert("上传成功!"); //files.html("<b>"+data.name+"("+data.size+"k)</b> <span>删除</span>"); $(".files").html("文件名: "+data.name+"<span> del </span>大小："+data.size); var img = "http://www.sandleft.com/test/input/upload/files/"+data.pic; $(".showimg").html("<img src='"https://www.jb51.net/article/+img+"'>"); alert("上传成功!"); }, error:function(){ alert("图片上传失败"); } }); $(".progress").hide(); }); </script>
前端上传HTML
<div> <div></div> <h1>文件上传</h1> <div></div> <div> <h1>Ajax Image Uploader</h1> <p>A simple tutorial to explain image uploading using jquery ajax and php</p> <form action='new_upload.php' method='post' enctype='multipart/form-data'> <label for="file">Filename:</label> <input type="file"><br> <input type="submit" value="upload"> </form> <div> <div role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100"> <span>0% Complete</span> </div> </div> <div></div> <div></div> </div> </div>
PHP文件上传类
<?php class upload{ protected $file_path = "files"; //当前files存储文件夹 #protected $file_size = 1024000; protected $file_size = 5120000; //5M 用户上传 //检测文件是否为空 public function check_file($get_file) { if (empty($get_file)) { $type = "check_file"; $arr = array('error'=>'empty_name','type'=>$type); echo json_encode($arr); exit(); } return true; } //检测文件类型 public function check_type($get_type) { if (( $get_type == ".docx" ) || ( $get_type == ".doc" )) { #$types = $get_type; }else{ $type = "check_type"; $arr = array('error'=>'format','type'=>$type); echo json_encode($arr); exit(); } return true; } //检测文件大小 public function check_size($get_file) { if ( $get_file != "" ) { if ( $get_file > $this->file_size ) { $arr = array('error'=>'large'); echo json_encode($arr); exit(); } }else{ return false; exit(); } return true; } //文件保存 public function save_file($file_type,$file_tmp_name) { $rand = rand(1000, 9999); $pics = date("YmdHis") . $rand . $file_type; $path = $this->file_path."https://www.jb51.net/".$pics; $result = move_uploaded_file($file_tmp_name, $path); if($result){ return $pics; }else{ return false; exit(); } #return $pics; } } PHP文件上传处理 <?php include("upload.class.php"); $up_obj = new upload(); $get_fileName = $_FILES['mypic']['name']; $get_fileSize = $_FILES['mypic']['size']; $get_TmpFiles = $_FILES['mypic']['tmp_name']; $get_fileType = strstr($get_fileName, '.'); $check_result = $up_obj->check_file($get_fileName); if($check_result){ //检查文件类型 $result_type = $up_obj->check_type($get_fileType); //检查文件大小 if($result_type){ $result_size = $up_obj->check_size($get_fileSize); if($result_size){ //文件上传保存 $pics = $up_obj->save_file($get_fileType,$get_TmpFiles); $size = round($get_fileSize/1024,2); $arr = array( 'name' => $get_fileName, 'pic' => $pics, 'size'=> $size, 'error' => 2 ); //检查文件上传状态 if($pics){ echo json_encode($arr); /* 执行上传完成逻辑..... */ } } } }
文件上传效果如图：
