英文:
How to create a list of uploaded files in Spring Boot?
问题
以下是您提供的内容的翻译部分：
控制器部分：
@Controller
class MyFileUploadController {
@RequestMapping(value = "/uploadOneFile", method = RequestMethod.GET)
public String uploadOneFileHandler(Model model) {
MyUploadForm myUploadForm = new MyUploadForm();
model.addAttribute("myUploadForm", myUploadForm);
return "uploadOneFile";
}
@RequestMapping(value = "/uploadOneFile", method = RequestMethod.POST)
public String uploadOneFileHandlerPOST(HttpServletRequest request, //
Model model, //
@ModelAttribute("myUploadForm") MyUploadForm myUploadForm) {
return this.doUpload(request, model, myUploadForm);
}
// ... (其他方法类似)
private String doUpload(HttpServletRequest request, Model model, //
MyUploadForm myUploadForm) {
// ... (上传文件的逻辑)
return "uploadResult";
}
}
MyUploadForm类：
public class MyUploadForm {
private String description;
private MultipartFile[] fileDatas;
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public MultipartFile[] getFileDatas() {
return fileDatas;
}
public void setFileDatas(MultipartFile[] fileDatas) {
this.fileDatas = fileDatas;
}
}
uploadOneFile.html页面：
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:c="http://java.sun.com/xml/ns/javaee">
<head>
<meta charset="UTF-8">
<title>Upload One File</title>
</head>
<body>
<th:block th:include="/_menu"></th:block>
<h3>Upload single file:</h3>
<form th:object="${myUploadForm}" method="POST"
action="" enctype="multipart/form-data">
Beschreibung:
<br>
<input th:field="*{description}" style="width:300px;"/><br/><br/>
File to upload: <input th:field="*{fileDatas}" type="file"/><br/>
<input type="submit" value="Upload">
</form>
</body>
</html>
这些部分是您提供的代码和HTML页面的翻译。如果您有任何其他问题或需要进一步帮助，请随时告诉我。
英文:
I want to create a list of uploaded files that are stored in a directory on my hard drive.
My Controller:
@Controller
class MyFileUploadController {
@RequestMapping(value = "/uploadOneFile", method = RequestMethod.GET)
public String uploadOneFileHandler(Model model) {
MyUploadForm myUploadForm = new MyUploadForm();
model.addAttribute("myUploadForm", myUploadForm);
return "uploadOneFile";
}
@RequestMapping(value = "/uploadOneFile", method = RequestMethod.POST)
public String uploadOneFileHandlerPOST(HttpServletRequest request, //
Model model, //
@ModelAttribute("myUploadForm") MyUploadForm myUploadForm) {
return this.doUpload(request, model, myUploadForm);
}
@RequestMapping(value = "/uploadMultiFile", method = RequestMethod.GET)
public String uploadMultiFileHandler(Model model) {
MyUploadForm myUploadForm = new MyUploadForm();
model.addAttribute("myUploadForm", myUploadForm);
return "uploadMultiFile";
}
@RequestMapping(value = "/uploadMultiFile", method = RequestMethod.POST)
public String uploadMultiFileHandlerPOST(HttpServletRequest request, //
Model model, //
@ModelAttribute("myUploadForm") MyUploadForm myUploadForm) {
return this.doUpload(request, model, myUploadForm);
}
private String doUpload(HttpServletRequest request, Model model, //
MyUploadForm myUploadForm) {
String description = myUploadForm.getDescription();
System.out.println("Description: " + description);
String uploadRootPath = request.getServletContext().getRealPath("upload");
System.out.println("uploadRootPath=" + uploadRootPath);
File uploadRootDir = new File("(directory)");
if (!uploadRootDir.exists()) {
uploadRootDir.mkdirs();
}
MultipartFile[] fileDatas = myUploadForm.getFileDatas();
List<File> uploadedFiles = new ArrayList<File>();
List<String> failedFiles = new ArrayList<String>();
for (MultipartFile fileData : fileDatas) {
String name = fileData.getOriginalFilename();
System.out.println("Client File Name = " + name);
if (name != null && name.length() > 0) {
try {
File serverFile = new File(uploadRootDir.getAbsolutePath() + File.separator + name);
BufferedOutputStream stream = new BufferedOutputStream(new
FileOutputStream(serverFile));
stream.write(fileData.getBytes());
stream.close();
uploadedFiles.add(serverFile);
System.out.println("Write file: " + serverFile);
} catch (Exception e) {
System.out.println("Error Write file: " + name);
failedFiles.add(name);
}
}
}
model.addAttribute("description", description);
model.addAttribute("uploadedFiles", uploadedFiles);
model.addAttribute("failedFiles", failedFiles);
return "uploadResult";
}
}
MyUploadForm
public class MyUploadForm {
private String description;
private MultipartFile[] fileDatas;
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public MultipartFile[] getFileDatas() {
return fileDatas;
}
public void setFileDatas(MultipartFile[] fileDatas) {
this.fileDatas = fileDatas;
}
}
The User can upload his files on the uploadOneFile.html.
uploadOneFile.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" xmlns:c="http://java.sun.com/xml/ns/javaee">
<head>
<meta charset="UTF-8">
<title>Upload One File</title>
</head>
<body>
<th:block th:include="/_menu"></th:block>
<h3>Upload single file:</h3>
<form th:object="${myUploadForm}" method="POST"
action="" enctype="multipart/form-data">
Beschreibung:
<br>
<input th:field="*{description}" style="width:300px;"/>
<br/><br/>
File to upload: <input th:field="*{fileDatas}" type="file"/>
<br/>
<input type="submit" value="Upload">
</form>
</body>
</html>
The uploaded files should then be displayed on the index page. Aswell it should be possible to download the files with just clicking on them.
I'm a beginner in Spring Boot so can you help me? If you need more informations let it me know.
答案1
得分: 1
你可以在那个页面上创建一个表格（HTML布局可以根据设计等选择）。
主要逻辑可能是：
- 从目录中获取文件列表。
- 将文件名存储在SET、LIST或您选择的其他数据结构中。
- 通过一些模型将先前的列表传递到UI，通过索引页面控制器。
- 渲染文件列表。
- 在单击特定文件时，调用端点通过名称下载文件。
一些初始感兴趣的代码可能如下所示：
File directoryPath = new File("D:\\PATH\\OF\\DIRECTORY");
FileFilter textFilefilter = new FileFilter(){
public boolean accept(File file) {
boolean isFile = file.isFile();
if (isFile) {
return true;
} else {
return false;
}
}
};
//所有文件的列表（仅限文件）
File filesList[] = directoryPath.listFiles(textFilefilter);
System.out.println("指定目录中的文件列表：");
for(File file : filesList) {
System.out.println("文件名：" + file.getName());
System.out.println("文件路径：" + file.getAbsolutePath());
System.out.println("大小：" + file.getTotalSpace());
System.out.println(" ");
}
英文:
You can create a table on that page (html layout you can choose as per design etc..)
Main logic can be:-
- Get list of file's from the directory.
- Have the names of files stored in a SET or LIST or something of your choice.
- Pass the previous list onto UI using some model via the index page controller.
- Render the list of files.
- Upon clicking the particular file, call the endpoint to download file by name.
Some Code of initial interest could be like below:-
File directoryPath = new File("D:\\PATH\\OF\\DIRECTORY");
FileFilter textFilefilter = new FileFilter(){
public boolean accept(File file) {
boolean isFile = file.isFile();
if (isFile) {
return true;
} else {
return false;
}
}
};
//List of all the files (only files)
File filesList[] = directoryPath.listFiles(textFilefilter);
System.out.println("List of the files in the specified directory:");
for(File file : filesList) {
System.out.println("File-name: "+file.getName());
System.out.println("File-path: "+file.getAbsolutePath());
System.out.println("Size: "+file.getTotalSpace());
System.out.println(" ");
}
</details>
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