SpringBoot开发案例之打造私有云网盘的实现

前言

最近在做工作流的事情，正好有个需求，要添加一个附件上传的功能，曾找过不少上传插件，都不是特别满意。无意中发现一个很好用的开源web文件管理器插件 elfinder，功能比较完善，社区也很活跃，还方便二次开发。

环境搭建

项目截图

周末抽时间做了一个简单的案例，希望对大家有所帮助，下面是简单的项目截图。

项目功能

在线新建目录、文件、附件上传、下载、预览、在线打包，图片在线裁剪、编辑，实现列表试图、图标视图等等一些列功能。

项目配置

项目在第三方插件进行二次开发，基于 SpringBoot 注解配置实现。

application.properties 配置：

# 执行类，内部调用，实现前端相关功能
file-manager.command=com.itstyle.cloud.common.elfinder.command
file-manager.thumbnail.width=80
file-manager.volumes[0].Node=
file-manager.volumes[0].source=fileSystem
file-manager.volumes[0].alias=file
# 文件存放目录，可以自定义
file-manager.volumes[0].path=D:/cloudFile
file-manager.volumes[0]._default=true
file-manager.volumes[0].locale=
file-manager.volumes[0].constraint.locked=false
file-manager.volumes[0].constraint.readable=true
file-manager.volumes[0].constraint.writable=true

ElfinderConfiguration 读取配置：

@Component
@ConfigurationProperties(prefix="file-manager") //接收application.properties中的file-manager下面的属性
public class ElfinderConfiguration {

  private Thumbnail thumbnail;

  private String command;

  private List volumes;

  private Long maxUploadSize = -1L;

  //省略部分代码
}

elfinderStorageFactory 初始化 基础Bean：

@Configuration
public class ElFinderConfig {

  @Autowired
  private ElfinderConfiguration elfinderConfiguration;

  @Bean(name = "commandFactory")
  public CommandFactory getCommandFactory() {
    CommandFactory commandFactory = new CommandFactory();
    commandFactory.setClassNamePattern(elfinderConfiguration.getCommand()+".%sCommand");
    return commandFactory;
  }

  @Bean(name = "elfinderStorageFactory")
  public ElfinderStorageFactory getElfinderStorageFactory() {
    DefaultElfinderStorageFactory elfinderStorageFactory = new DefaultElfinderStorageFactory();
    elfinderStorageFactory.setElfinderStorage(getElfinderStorage());
    return elfinderStorageFactory;
  }

  @Bean(name = "elfinderStorage")
  public ElfinderStorage getElfinderStorage() {
    DefaultElfinderStorage defaultElfinderStorage = new DefaultElfinderStorage();

    // creates thumbnail
    DefaultThumbnailWidth defaultThumbnailWidth = new DefaultThumbnailWidth();
    defaultThumbnailWidth.setThumbnailWidth(elfinderConfiguration.getThumbnail().getWidth().intValue());

    // creates volumes, volumeIds, volumeLocale and volumeSecurities
    Character defaultVolumeId = 'A';
    List elfinderConfigurationVolumes = elfinderConfiguration.getVolumes();
    List elfinderVolumes = new ArrayList<>(elfinderConfigurationVolumes.size());
    Map elfinderVolumeIds = new HashMap<>(elfinderConfigurationVolumes.size());
    Map elfinderVolumeLocales = new HashMap<>(elfinderConfigurationVolumes.size());
    List elfinderVolumeSecurities = new ArrayList<>();

    // creates volumes
    for (Node elfinderConfigurationVolume : elfinderConfigurationVolumes) {

      final String alias = elfinderConfigurationVolume.getAlias();
      final String path = elfinderConfigurationVolume.getPath();
      final String source = elfinderConfigurationVolume.getSource();
      final String locale = elfinderConfigurationVolume.getLocale();
      final boolean isLocked = elfinderConfigurationVolume.getConstraint().isLocked();
      final boolean isReadable = elfinderConfigurationVolume.getConstraint().isReadable();
      final boolean isWritable = elfinderConfigurationVolume.getConstraint().isWritable();

      // creates new volume
      Volume volume = VolumeSources.of(source).newInstance(alias, path);

      elfinderVolumes.add(volume);
      elfinderVolumeIds.put(volume, Character.toString(defaultVolumeId));
      elfinderVolumeLocales.put(volume, LocaleUtils.toLocale(locale));

      // creates security constraint
      SecurityConstraint securityConstraint = new SecurityConstraint();
      securityConstraint.setLocked(isLocked);
      securityConstraint.setReadable(isReadable);
      securityConstraint.setWritable(isWritable);

      // creates volume pattern and volume security
      final String volumePattern = Character.toString(defaultVolumeId) + ElFinderConstants.ELFINDER_VOLUME_SERCURITY_REGEX;
      elfinderVolumeSecurities.add(new DefaultVolumeSecurity(volumePattern, securityConstraint));

      // prepare next volumeId character
      defaultVolumeId++;
    }

    defaultElfinderStorage.setThumbnailWidth(defaultThumbnailWidth);
    defaultElfinderStorage.setVolumes(elfinderVolumes);
    defaultElfinderStorage.setVolumeIds(elfinderVolumeIds);
    defaultElfinderStorage.setVolumeLocales(elfinderVolumeLocales);
    defaultElfinderStorage.setVolumeSecurities(elfinderVolumeSecurities);
    return defaultElfinderStorage;
  }
}

CloudDiskController 控制层实现：

@Controller
@RequestMapping("elfinder/connector")
public class CloudDiskController {

  private static final Logger logger = LoggerFactory.getLogger(CloudDiskController.class);

  public static final String OPEN_STREAM = "openStream";
  public static final String GET_PARAMETER = "getParameter";

  @Resource(name = "commandFactory")
  private ElfinderCommandFactory elfinderCommandFactory;

  @Resource(name = "elfinderStorageFactory")
  private ElfinderStorageFactory elfinderStorageFactory;

  @RequestMapping
  public void connector(HttpServletRequest request, final HttpServletResponse response) throws IOException {
    try {
      response.setCharacterEncoding("UTF-8");
      request = processMultipartContent(request);
    } catch (Exception e) {
      throw new IOException(e.getMessage());
    }


    String cmd = request.getParameter(ElFinderConstants.ELFINDER_PARAMETER_COMMAND);
    ElfinderCommand elfinderCommand = elfinderCommandFactory.get(cmd);

    try {
      final HttpServletRequest protectedRequest = request;
      elfinderCommand.execute(new ElfinderContext() {
 @Override
 public ElfinderStorageFactory getVolumeSourceFactory() {
   return elfinderStorageFactory;
 }

 @Override
 public HttpServletRequest getRequest() {
   return protectedRequest;
 }

 @Override
 public HttpServletResponse getResponse() {
   return response;
 }
      });
    } catch (Exception e) {
      logger.error("Unknown error", e);
    }
  }
  //省略部分代码
}

最后，前端页面引入：

小结

总体来说个人使用还是非常不错的，当然对于一些成熟的网盘系统还是有一些差距。

源码：https://gitee.com/52itstyle/spring-boot-CloudDisk

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。