JAVA图片批量上传JS-带预览功能

这篇文章就简单的介绍一个很好用的文件上传工具，批量带预览功能。直接贴代码吧，都有注释，很好理解。

HTML页面

<!DOCTYPE html>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<c:set var="BASE" value="${pageContext.request.contextPath}"/>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>新增照片</title>
<script type="text/javascript">
var BASE = "${BASE}";
</script>
<!-- 引用控制层插件样式 -->
<link rel="stylesheet" href="${BASE}/www/css/upload/zyupload-1.0.0.min.css " type="text/css">
<script type="text/javascript" src="${BASE}/www/js/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="${BASE}/www/js/upload/zyupload-1.0.0.min.js"></script>
</head>
<body>
<input type="hidden" id="boxId" value="${boxId}"/>
        <div id="zyupload" class="zyupload"></div>  
         
         
        <script type="text/javascript">
            $(function(){
                var boxId = $("#boxId").val();
                // 初始化插件
                $("#zyupload").zyUpload({
                    width            :   "650px",                 // 宽度
                    height           :   "400px",                 // 宽度
                    itemWidth        :   "140px",                 // 文件项的宽度
                    itemHeight       :   "115px",                 // 文件项的高度
                    url              :   BASE+"/photo/add/"+boxId,  // 上传文件的路径
                    fileType         :   ["jpg","png","txt","js","exe","gif"],// 上传文件的类型
                    fileSize         :   51200000,                // 上传文件的大小
                    multiple         :   true,                    // 是否可以多个文件上传
                    dragDrop         :   true,                    // 是否可以拖动上传文件
                    tailor           :   true,                    // 是否可以裁剪图片
                    del              :   true,                    // 是否可以删除文件
                    finishDel        :   false,                   // 是否在上传文件完成后删除预览
                    /* 外部获得的回调接口 */
                    onSelect: function(selectFiles, allFiles){    // 选择文件的回调方法  selectFile:当前选中的文件  allFiles:还没上传的全部文件
                        console.info("当前选择了以下文件：");
                        console.info(selectFiles);
                    },
                    onDelete: function(file, files){              // 删除一个文件的回调方法 file:当前删除的文件  files:删除之后的文件
                        console.info("当前删除了此文件：");
                        console.info(file.name);
                    },
                    onSuccess: function(file, response){          // 文件上传成功的回调方法
                        console.info("此文件上传成功：");
                        console.info(file.name);
                        console.info("此文件上传到服务器地址：");
                        console.info(response);
                        $("#uploadInf").append("<p>上传成功，文件地址是：" + response + "</p>");
                    },
                    onFailure: function(file, response){          // 文件上传失败的回调方法
                        console.info("此文件上传失败：");
                        console.info(file.name);
                    },
                    onComplete: function(response){               // 上传完成的回调方法
                        console.info("文件上传完成");
                        console.info(response);
                    }
                });
                 
            });
         
        </script> 
    </body>
      </body>     
</html>

　JS和CSS、IMAGES文件下载地址https://page69.ctfile.com/fs/3775069-203728262，自己根据html中的导入，找不到的在eclipse全局搜索

action代码：根据需求改地址

@RequestMapping(value="/add/{boxId}", method={RequestMethod.POST})
    public void addPhotospost(@PathVariable(value="boxId") String boxId, HttpServletRequest request,HttpServletResponse response ) throws IOException {
        ServletContext servletContext=request.getSession().getServletContext(); 
        String newFileName=""; 
            PrintWriter out = response.getWriter();  
              
            //文件保存目录路径  
            String savePath = "E:/";  
            //String savePath = this.getServletContext().getRealPath("/") + configPath;  
              
            // 临时文件目录   
            String tempPath = servletContext.getRealPath("/") + Constant.dirTemp;  
              
            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");  
            String ymd = sdf.format(new Date());  
            savePath += "/" + ymd + "/";  
            //创建文件夹  
            File dirFile = new File(savePath);  
            if (!dirFile.exists()) {  
                dirFile.mkdirs();  
            }  
              
            tempPath += "/" + ymd + "/";  
            //创建临时文件夹  
            File dirTempFile = new File(tempPath);  
            if (!dirTempFile.exists()) {  
                dirTempFile.mkdirs();  
            }  
              
            DiskFileItemFactory  factory = new DiskFileItemFactory();  
            factory.setSizeThreshold(20 * 1024 * 1024); //设定使用内存超过5M时，将产生临时文件并存储于临时目录中。     
            factory.setRepository(new File(tempPath)); //设定存储临时文件的目录。     
            ServletFileUpload upload = new ServletFileUpload(factory);  
            upload.setHeaderEncoding("UTF-8");  
            try {  
                List items = upload.parseRequest(request);  
                System.out.println("items = " + items);  
                Iterator itr = items.iterator();  
                  
                while (itr.hasNext())   
                {  
                    FileItem item = (FileItem) itr.next();  
                    String fileName = item.getName();  
                    long fileSize = item.getSize();  
                    if (!item.isFormField()) {  
                        String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();  
                        SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");  
                         newFileName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;  
                        try{  
                            File uploadedFile = new File(savePath, newFileName);  
                            
                            OutputStream os = new FileOutputStream(uploadedFile);  
                            InputStream is = item.getInputStream();  
                            byte buf[] = new byte[1024];//可以修改 1024 以提高读取速度  
                            int length = 0;    
                            while( (length = is.read(buf)) > 0 ){    
                                os.write(buf, 0, length);    
                            }    
                            //关闭流    
                            os.flush();  
                            os.close();    
                            is.close();    
                            System.out.println("上传成功！路径："+savePath+"/"+newFileName);  
                            out.print(savePath+"/"+newFileName);  
                        }catch(Exception e){  
                            e.printStackTrace();  
                        }  
                    }else {  
                        String filedName = item.getFieldName();  
                        System.out.println("===============");   
                        System.out.println(new String(item.getString().getBytes("iso-8859-1"),
                                "utf-8"));  
                        System.out.println("FieldName："+filedName);  
                        // 获得裁剪部分的坐标和宽高
                        System.out.println("String："+item.getString());  
                    }             
                }   
                  
            } catch (FileUploadException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
            out.flush();  
            out.close();         
    }