jquery-file-upload demo

下载地址:http://plugins.jquery.com/blueimp-file-upload/

文档地址:https://github.com/blueimp/jQuery-File-Upload/wiki

本文只是一个demo,实现功能也很简单:点击一个上传按钮,用户选择图片,图片Ajax上传到后台存储到硬盘,返回一个连接,页面上显示用户上传的图片。

(jquery-file-upload多文件上传可以做的非常漂亮,我这里有点大材小用了)

注:demo 页面为jsp,服务端为Java springMVC。

页面代码:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/html">

<head>
    <meta charset="UTF-8">
    <title>file upload demo</title>
    
    <link rel="stylesheet" href="<c:url value ='/resource/themes/bootstrap/css/bootstrap.min.css'/>">
    <link rel="stylesheet" href="<c:url value ='/resource/js/jQuery-File-Upload/css/jquery.fileupload.css'/>">
     <script src="<c:url value ='/resource/js/jquery-1.9.1.min.js'/>"></script>
    <script src=" <c:url value ='/resource/js/jQuery-File-Upload/js/vendor/jquery.ui.widget.js'/>"></script>
    <script src=" <c:url value ='/resource/js/jQuery-File-Upload/js/jquery.iframe-transport.js'/>"></script>
    <script src=" <c:url value ='/resource/js/jQuery-File-Upload/js/jquery.fileupload.js'/>"></script>
    <script src="<c:url value ='/resource/themes/bootstrap/js/bootstrap.min.js'/>"></script>
    
     <script type="text/javascript">
    
     $(function () {
            var url = "/portal/upload/uploadImg.do";
            $('#fileupload').fileupload({
                url: url,
                dataType: 'text',
                done: function (e, data) {
                    console.dir(data);
                    $(".imgView img").attr('src','${contextPath}'+data.result);
                    $("#progress").hide();
                    $(".imgView").show();
                    
                },
                progressall: function (e, data) {
                    console.dir(data);
                    var progress = parseInt(data.loaded / data.total * 100, 10);
                    $('#progress .progress-bar').css(
                        'width',
                        progress + '%'
                    );
                }
            });
        });
    </script>
</head>
<body>
    <span class="btn btn-success fileinput-button">
        <i class="glyphicon glyphicon-plus"></i>
        <span>Select file.</span>
        <!-- The file input field used as target for the file upload widget -->
        <input id="fileupload" type="file" name="imgFile"/>
    </span>
    <br>
    <br>
    <!-- The global progress bar -->
    <div id="progress" class="progress">
        <div class="progress-bar progress-bar-success"></div>
    </div>
    <div class="imgView" hidden="hidden">
        <img src="">
    </div>            
</body>
</html>

如果要自己写css

那么只需以下四个js:jquery.min.jsjquery.ui.widget.jsjquery.iframe-transport.jsjquery.fileupload.js

配置:对id为fileupload 的file input 进行fileupload实例化,url即为图片要上传到服务端的后台链接,也可以通过html5的属性 data-url 直接在input中给,input的name要给,或者通过配置 paramName属性也是可以的。progressall是配置进度条的,done是上传到后台返回后的事件。

Java代码:

 

import java.io.IOException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import com.isoftstone.veco.common.base.controller.BaseController;
import com.isoftstone.veco.common.upload.FileUploadHandler;

@RequestMapping("/upload")
@Controller
public class UploadController extends BaseController
{
    @RequestMapping("/uploadImg.do")
    public @ResponseBody
    String uploadMaterialImg(@RequestParam("imgFile") MultipartFile multipartFile)
    {
        String resp = null;
        if (multipartFile != null)
        {
            try
            {
                byte[] file = multipartFile.getBytes();
                String dir = "/test";
                String imgId = FileUploadHandler.uploadImg(file, dir);
                resp = FileUploadHandler.UPLOAD_CONFIG.getImgVirtualDir() + "?" + FileUploadHandler.UPLOAD_CONFIG.getDownloadParamName() + "="
                        + imgId;
            } catch (IOException e)
            {
                e.printStackTrace();
            }
        }
        return resp;
    }

}

 

try中间的上传逻辑就不详细写了,controller这里写的有点挫,应该返回一个json格式的,判断上传是否成功,给用户反馈的,不过我这里只是一个demo,哈哈

补充:增加对上传图片格式的验证,以及对图片大小的验证,配置如下  
 $('#fileupload').fileupload({
                url: url,
                paramName:"imgFile",
                acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
                maxFileSize: 5000000, // 5 MB
                dataType: 'text',
                done: function (e, data) {
                    console.dir(data);
                    $(".imgView img").attr('src','${contextPath}'+data.result);
                    $("#progress").hide();
                    $(".imgView").show();
                    
                },
                progressall: function (e, data) {
                    console.dir(data);
                    var progress = parseInt(data.loaded / data.total * 100, 10);
                    $('#progress .progress-bar').css(
                        'width',
                        progress + '%'
                    );
                },
                messages: {
                    acceptFileTypes: '图片类型不合法 ',
                    maxFileSize: '图片大小超过限制'
                }
            }).on('fileuploadprocessalways', function (e, data) {
                var index = data.index,
                file = data.files[index];
                if (file.error) {
                       alert(file.error);
                    }
          
                });

注: acceptFileTypes, maxFileSize这两个属性是jquery-file-upload中jquery.fileupload-validate.js中的,需要在进入两个js文件:

jquery.fileupload-validate.js和jquery.fileupload-process.js

在通过注册上传后台之前的事件fileuploadprocessalways 来获取错误信息,如果不知道data中是什么可以通过 console.dir(data);在浏览器debug控制台中查看

 


 

posted @ 2014-08-18 22:23  china2k  阅读(2968)  评论(2编辑  收藏  举报