web中文件上传下载

你的名字 2022-06-17 06:16 226阅读 0赞

文件上传

<input id="f_aa" οnchange="upload('aa');" type="file" name="cmfile" class="file-styled">
    
    //验证是否为文件
    function validateFile(fileName){
    	fileName = fileName.toUpperCase();
    	if(fileName.indexOf(".PDF")>=0 || fileName.indexOf(".DOC")>=0 || fileName.indexOf(".DOCX")>=0) {
    		return true;
    	}else{
    		return false;
    	}
    }
    
    function upload(id){
    	var basePath = window.location.protocol+"//"+window.location.host+"/";
    	var fileName = $("#f_"+id).val();
    	if(validateFile(fileName)){//validateFile()文件格式验证
    		$.ajaxFileUpload({
    			url:ctx+'/file/upload.json',
    			secureuri:false,
    			fileElementId:'f_'+id,
    			dataType: 'json',
    			data:{fileloc:'upload/', dir:'temp'},
    			success: function (data){
    				if(data.stat == "1" || data.stat == 1){
    					var val=$("#fileName").val();
    					$("#fileName").val(data.data.fileName);
    					$("#filePath").val(data.data.newPath);
    					$("#suffix").val(data.data.suffix);
    					$("#fileSize").val(data.data.size);
    				}else{
    					alert("The file is less than 10M");
    				}
    			},
    		});
    	}else {
    		alert("File type should be doc, docx or PDF!");
    	}
    }

@RequestMapping(value = "/upload.json")
    	 public ResponseEntity<String> upload(HttpServletRequest request,@RequestParam("cmfile") CommonsMultipartFile cmfile,HttpServletResponse response) throws Exception{
    		 ReturnBean rb = new ReturnBean();//返回的实体bean,里面封装了文件各种属性
    		 if(cmfile!=null && !cmfile.isEmpty()){
    			 String fileName = cmfile.getOriginalFilename();  
    			 Long size = cmfile.getSize();  
    			 String suffix = fileName.substring(fileName.lastIndexOf("."));
    			 //如果大于10M报错
    			 if(size > 10485760){
    				 return renderDataNew(0,"notok",rb);
    			 }
    			 FileUploadBean fileUploadBean = FileUtil.execFileUtil(request,"文件名","本地路径",cmfile);
    			 
    			 cmfile.getFileItem().write(fileUploadBean.getFileaddress());
    			 rb.setNewPath(fileUploadBean.getNewPath());
    			 rb.setFileName(fileName);
    			 rb.setSuffix(suffix);
    			 renderDataNew(1,"ok",rb);
    			 return renderDataNew(1,"ok",rb);
    			 
    		 }
    		 return renderDataNew(0,"notok",rb);
    	 }

下载访问路径"download?filePath="+filePath+"&fileName="+fileName;

@RequestMapping(value = "/download") public void download(HttpServletRequest request,HttpServletResponse response,String filePath, String fileName)throws Exception \{ //this.systemConfig.getUploadDirectoryPath()是我在web配置文件中配置的源路径upload.directory.path=E\\:/upload,然后加载出来 //获取服务器中文件路径 String nowPath = this.systemConfig.getUploadDirectoryPath() +"/"+filePath; File file = new File(nowPath); //清除缓冲区 response.reset(); //添加响应头 if(StringUtils.isNotEmpty(fileName))\{ response.addHeader("Content- Disposition","attachment;filename="+newString(fileName.getBytes("gbk"),"iso-8859-1")); //转码之后下载的文件不会出现中文乱码 \}else\{ String\[\] name = filePath.split("/");//filePath="aaa/20170418/149248.docx"; response.addHeader("Content-Disposition", "attachment;filename="+new String(name\[2\].getBytes("gbk"),"iso-8859-1")); //转码之后下载的文件不会出现中文乱码 \} response.addHeader("Content-Length", "" + file.length()); //以流的形式下载文件 InputStream fis = new BufferedInputStream(new FileInputStream(nowPath)); byte\[\] buffer = new byte\[fis.available()\]; fis.read(buffer); fis.close(); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); toClient.write(buffer); toClient.flush(); toClient.close(); \}