基于SpringBoot上传任意文件功能的实现
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2024-02-15 09:21:16
一、pom文件依赖的添加
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一、pom文件依赖的添加
<dependencies> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-web</artifactid> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-test</artifactid> <scope>test</scope> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-thymeleaf</artifactid> </dependency> </dependencies>
二、controller层
@controller public class fileuploadcontroller { private final storageservice storageservice; @autowired public fileuploadcontroller(storageservice storageservice) { this.storageservice = storageservice; } //展示上传过的文件 @getmapping("/") public string listuploadedfiles(model model) throws ioexception { model.addattribute("files", storageservice.loadall().map(path -> mvcuricomponentsbuilder.frommethodname(fileuploadcontroller.class, "servefile", path.getfilename().tostring()) .build().tostring()) .collect(collectors.tolist())); return "uploadform"; } //下载选定的上传的文件 @getmapping("/files/{filename:.+}") @responsebody public responseentity<resource> servefile(@pathvariable string filename) { resource file = storageservice.loadasresource(filename); return responseentity .ok() .header(httpheaders.content_disposition, "attachment; filename=\""+file.getfilename()+"\"") .body(file); } //上传文件 @postmapping("/") public string handlefileupload(@requestparam("file") multipartfile file, redirectattributes redirectattributes) { storageservice.store(file); redirectattributes.addflashattribute("message", "you successfully uploaded " + file.getoriginalfilename() + "!"); return "redirect:/"; } @exceptionhandler(storagefilenotfoundexception.class) public responseentity<?> handlestoragefilenotfound(storagefilenotfoundexception exc) { return responseentity.notfound().build(); } }
三、实现的service层
@service public class filesystemstorageservice implements storageservice { private final path rootlocation; @autowired public filesystemstorageservice(storageproperties properties) { this.rootlocation = paths.get(properties.getlocation()); } @override public void store(multipartfile file) { try { if (file.isempty()) { throw new storageexception("failed to store empty file " + file.getoriginalfilename()); } files.copy(file.getinputstream(), this.rootlocation.resolve(file.getoriginalfilename())); } catch (ioexception e) { throw new storageexception("failed to store file " + file.getoriginalfilename(), e); } } @override public stream<path> loadall() { try { return files.walk(this.rootlocation, 1) .filter(path -> !path.equals(this.rootlocation)) .map(path -> this.rootlocation.relativize(path)); } catch (ioexception e) { throw new storageexception("failed to read stored files", e); } } @override public path load(string filename) { return rootlocation.resolve(filename); } @override public resource loadasresource(string filename) { try { path file = load(filename); resource resource = new urlresource(file.touri()); if(resource.exists() || resource.isreadable()) { return resource; } else { throw new storagefilenotfoundexception("could not read file: " + filename); } } catch (malformedurlexception e) { throw new storagefilenotfoundexception("could not read file: " + filename, e); } } @override public void deleteall() { filesystemutils.deleterecursively(rootlocation.tofile()); } @override public void init() { try { files.createdirectory(rootlocation); } catch (ioexception e) { throw new storageexception("could not initialize storage", e); } } }
四、在application.properties文件上配置上传的属性
spring.http.multipart.max-file-size=128kb
spring.http.multipart.max-request-size=128kb
五、服务启动时的处理
六、测试成功的结果
以上这篇基于springboot上传任意文件功能的实现就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持。
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