标签:ram ash bsp 移动 util output 请求 点击 dictd
一、后台的文件上传action
private String tempPath = this.servletContext.getRealPath("") + File.separator + "tempFolder"; private String realPath = this.servletContext.getRealPath("") + File.separator + "realFolder"; private File attach;//前台传入 private String attachContentType; private String attachFileName; private String attachTempName; /** * 创建任务时附件首先上传到临时文件夹 * @return */ @Action(value="UploadTemp") public String UploadTemp(){ System.out.println("!!!!!!!进入文件上传!!!!!!!"); int fileState = 0;//标识目标文件是否存在,如果存在提醒修改文件名称 0表示不重复,1表示重复,2表示文件复制出错 String wpyId = request.getParameter("wpyId"); //临时文件由原文件名+#+用户名组成以防重复,个人每次任务只传一个文件,正式传完即删除临时文件夹内容,不会重复 String attachTempName = wpyId+"#"+attachFileName; //看临时路径是否存在 Util.checkDirExist(tempPath); String attachFile = tempPath + File.separator + attachTempName; //创建目标文件 File destFile = new File(attachFile); if (destFile.exists()) { new File(attachFile).delete(); } int byteread = 0; // 读取的字节数 InputStream in = null; OutputStream out = null; try { in = new FileInputStream(attach); out = new FileOutputStream(destFile); byte[] buffer = new byte[1024]; //定义一个流 in,存入buffer中,=-1代表读完 while ((byteread = in.read(buffer)) != -1) { out.write(buffer, 0, byteread); } // return true; } catch (FileNotFoundException e) { fileState = 2; e.printStackTrace(); // return false; } catch (IOException e) { fileState = 2; e.printStackTrace(); // return false; } finally { try { if (out != null) out.close(); if (in != null) in.close(); attach.delete(); } catch (IOException e) { e.printStackTrace(); } } Map<String, Object> fileInfo = new HashMap<String, Object>(); fileInfo.put("uploadName", attachTempName); fileInfo.put("fileState", fileState); outputJson(fileInfo); return NONE; }
二、前台页面
<div class="col-sm-2" style="padding-right:0px"> <a id="advancedDropzone" class="btn btn-primary" style="width:100%"> 点击上传图片 </a> </div> <div class="col-sm-6" style="padding-left:0px"> <div class="input-group"> <input readonly type="text" id="img_name" class="form-control"> <div class="input-group-btn"> <a id="delTempFile" tabindex="-1" class="btn btn-primary" type="button">删除文件</a> </div> </div> </div>
三、js 发起请求
//上传附件按钮组件 var example_dropzone = $("#advancedDropzone").dropzone({ //首先上传到临时位置,如果整体提交,再移动到规定位置,如果整体取消,则删除临时文件 url: baseCtx+‘/.../UploadTemp.action?Id=‘+curuser, paramName: "attach", acceptedFiles: ".jpg,.png,.bmp", dictDefaultMessage:"点击上传文件", maxFiles:1,//一次性上传的文件数量上限 maxFilesize: 20, //MB addedfile: function(file) { var size = parseInt(file.size/1024, 10); size = file.size < 1024 ? (file.size + " 字节") : (size + " KB"); upLoadSize = size; $("#img_name").val(file.name+" "+upLoadSize+" 上传中..."); }, success:function(file,data){ var currData = $.parseJSON(data); uploadName = currData.uploadName; $("#opr_screenshot_name").val(uploadName+" "+upLoadSize+" 已完成"); //激活删除临时文件按钮 $("#delTempFile").off().on("click",function(){ $("#opr_screenshot_name").val(""); $.ajax({ url : baseCtx+‘/.../delTempFile.action‘, //TODO data : { attachTempName:uploadName }, type : ‘post‘, async : false, dataType : "json", success: function(data){ } }) }) }, error: function(file) { alert(file.name+"上传未成功") }, removedfile:function(file){ uploadName=""; } }) })
标签:ram ash bsp 移动 util output 请求 点击 dictd
原文地址:http://www.cnblogs.com/Lxiaojiang/p/6339796.html