在春季使用 MultiPartFile 数据类型在 webapp 上上传时重命名文件

Question

I have to upload an image from the user interface and change its name according to my need.我必须从用户界面上传图像并根据需要更改其名称。

ie if user uploads an image with a name WIN_20151122_09_57_47_Pro.jpg I would have to change it to 1.jpg即如果用户上传名称为 WIN_20151122_09_57_47_Pro.jpg 的图像，我将不得不将其更改为 1.jpg

I am using Spring mvc and for file upload and display I am using MultiPartFile datatype我正在使用 Spring mvc 和文件上传和显示我使用MultiPartFile数据类型

Below is the model.下面是模型。

FileBucket.java

package com.faisal.model;

import org.springframework.web.multipart.MultipartFile ;

public class FileBucket {

      MultipartFile file ;

       public MultipartFile getFile() {
             return file ;
      }

       public void setFile(MultipartFile file ) {
             this.file = file;
      }
}

The controller part where I am uploading the file on the server我在服务器上上传文件的控制器部分

@Autowired
      ServletContext servletContext;

@RequestMapping(value = "/singleUpload" , method = RequestMethod.POST)
       public String singleFileUpload(@Valid FileBucket fileBucket,
                  BindingResult result, ModelMap model ) throws IOException {

            String PROFILE_UPLOAD_LOCATION = servletContext.getRealPath("/" )
                        + File. separator + "resources" + File.separator
                        + "profile_images" + File.separator;

             if (result .hasErrors()) {
                  System. out.println("validation errors" );
                   return "singleFileUploader" ;
            } else {
                  System. out.println("Fetching file" );
                  String destination=PROFILE_UPLOAD_LOCATION
                              + fileBucket.getFile().getOriginalFilename();

                  File file = new File(destination);
                  File newFile=new File(PROFILE_UPLOAD_LOCATION +"1.jpg" );


                  FileCopyUtils. copy(fileBucket.getFile().getBytes(), file);
                  FileUtils. moveFile(file, newFile);


                  MultipartFile multipartFile = fileBucket .getFile();
                  String fileName = multipartFile .getOriginalFilename();
                   model.addAttribute("fileName" , fileName );
                   return "success" ;
            }
      }

View page查看页面

<body>
       <div class="success" >

       <img src=" ${pageContext.request.contextPath}/resources/profile_images/${fileName} " height ="100" width="100" />
       <br/>
            File <strong> ${fileName}</strong > uploaded successfully.
       </div>

</body>

In the code above I have successfully renamed the file but then while redirecting on the same page the image is not displayed since it has been replaced by 1.jpg在上面的代码中，我成功地重命名了文件，但是在同一页面上重定向时，图像没有显示，因为它已被 1.jpg 替换

Answer 1

Try <spring:url> like this <img src='<spring:url value="/resources/profile-pictures/${user.profileImage}" />' > .像这样尝试<spring:url> <img src='<spring:url value="/resources/profile-pictures/${user.profileImage}" />' > 。

Here's how I implemented UserController and in jsp view <img src='<spring:url value="/resources/profile-pictures/${user.profileImage}" />' alt="User Image">这是我如何实现UserController并在 jsp 视图中<img src='<spring:url value="/resources/profile-pictures/${user.profileImage}" />' alt="User Image">

在春季使用 MultiPartFile 数据类型在 webapp 上上传时重命名文件

问题描述

1 个解决方案

解决方案1
1 已采纳 2016-03-27 06:58:01

在春季使用 MultiPartFile 数据类型在 webapp 上上传时重命名文件

问题描述

1 个解决方案

解决方案1 1 已采纳 2016-03-27 06:58:01

解决方案1
1 已采纳 2016-03-27 06:58:01