共计 2909 个字符,预计需要花费 8 分钟才能阅读完成。
视频演示:
https://www.bilibili.com/video/BV1VK4y1s7b1/
需要完成以下步骤:
-
创建工程并引入依赖包
- spring-boot-starter-web
- lombok
- 对文件进行操作,上传、预览和删除
- 添加跨域功能
- <font color = red> 前端使用 VUE,前后端分离 </font>
- <font color = red> 看不懂代码,不建议下载 </font>
- 可以参考上一篇文章, 文件上传采用 Form 方式 (前后端不分离)
FileUploadController.java
package com.example.spring.fileupload;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.util.FileSystemUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder;
import java.io.IOException;
import java.net.MalformedURLException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.List;
import java.util.stream.Collectors;
@RestController
public class FileUploadController {
// 上传文件路径
@Value("${file.base.director}")
private String fileBaseDirector;
private Path fileBasePath;
@Autowired
private void createDirectories(){
try {Files.createDirectories(Paths.get(fileBaseDirector));
} catch (IOException e) {e.printStackTrace();
}
this.fileBasePath = Path.of(fileBaseDirector);
}
@GetMapping("/loadAll")
public ResponseEntity loadAll() throws IOException {List<FileObject> filesAll = Files.walk(fileBasePath,1)
.filter(path -> !path.equals(fileBasePath))
.map(path -> {String url = MvcUriComponentsBuilder.fromMethodName(FileUploadController.class,"loadFile",path.getFileName().toString()).build().toString();
FileObject fileObject = new FileObject(path.getFileName().toString(),url);
return fileObject;
}).collect(Collectors.toList());
return ResponseEntity.ok(filesAll);
}
@DeleteMapping("delete/{fileName}")
public ResponseEntity deleteFile(@PathVariable String fileName){Path deletePath = fileBasePath.resolve(fileName);
Boolean isDelete = Boolean.FALSE;
try {isDelete = FileSystemUtils.deleteRecursively(deletePath);
} catch (IOException e) {e.printStackTrace();
}
return ResponseEntity.ok(isDelete);
}
@GetMapping("/{fileName}")
public ResponseEntity loadFile(@PathVariable String fileName){Path path = fileBasePath.resolve(fileName);
Resource resource = null;
try {resource = new UrlResource(path.toUri());
} catch (MalformedURLException e) {e.printStackTrace();
}
return ResponseEntity.ok()
.header(HttpHeaders.CONTENT_DISPOSITION,"attachment;filename=\""+resource.getFilename()+"\"")
.body(resource);
}
@PostMapping("/upload")
public ResponseEntity upload(@RequestParam("file") MultipartFile file){String fileName = StringUtils.cleanPath(file.getOriginalFilename());
Path path = Path.of(fileBaseDirector + fileName);
try {Files.copy(file.getInputStream(),path,StandardCopyOption.REPLACE_EXISTING);
} catch (IOException e) {e.printStackTrace();
}
return ResponseEntity.ok("OK");
}
}
正文完