【微服务架构 - 14 - FastDFS】 02 使用 FastDFS Java 客户端

本是古典何须时尚 2022-03-11 02:28 146阅读 0赞

#### 安装 FastDFS Java 客户端 ####

--------------------

#### 克隆源码 ####

git clone https://github.com/happyfish100/fastdfs-client-java.git

#### 使用 Maven 从源码安装 ####

mvn clean install

#### 在项目中添加依赖 ####

<dependency>
        <groupId>org.csource</groupId>
        <artifactId>fastdfs-client-java</artifactId>
        <version>1.27-SNAPSHOT</version>
    </dependency>

#### FastDFS 工具类 ####

--------------------

##### 文件存储服务接口 #####

public interface StorageService {
        /**
         * 上传文件
         *
         * @param data    文件的二进制内容
         * @param extName 扩展名
         * @return 上传成功后返回生成的文件id；失败，返回null
         */
        public String upload(byte[] data, String extName);
    
        /**
         * 删除文件
         *
         * @param fileId 被删除的文件id
         * @return 删除成功后返回0，失败后返回错误代码
         */
        public int delete(String fileId);
    }

##### 文件存储服务接口实现类 #####

import org.csource.common.NameValuePair;
    import org.csource.fastdfs.ClientGlobal;
    import org.csource.fastdfs.StorageClient1;
    import org.csource.fastdfs.StorageServer;
    import org.csource.fastdfs.TrackerClient;
    import org.csource.fastdfs.TrackerGroup;
    import org.csource.fastdfs.TrackerServer;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.InitializingBean;
    import org.springframework.beans.factory.annotation.Value;
    
    import java.io.File;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.io.PrintWriter;
    
    public class FastDFSStorageService implements StorageService, InitializingBean {
        private static final Logger logger = LoggerFactory.getLogger(FastDFSStorageService.class);
    
        private TrackerClient trackerClient;
    
        @Value("${storage.fastdfs.tracker_server}")
        private String trackerServer;
    
        @Override
        public String upload(byte[] data, String extName) {
            TrackerServer trackerServer = null;
            StorageServer storageServer = null;
            StorageClient1 storageClient1 = null;
            try {
                NameValuePair[] meta_list = null; // new NameValuePair[0];
    
                trackerServer = trackerClient.getConnection();
                if (trackerServer == null) {
                    logger.error("getConnection return null");
                }
                storageServer = trackerClient.getStoreStorage(trackerServer);
                storageClient1 = new StorageClient1(trackerServer, storageServer);
                String fileid = storageClient1.upload_file1(data, extName, meta_list);
                logger.debug("uploaded file <{}>", fileid);
                return fileid;
            } catch (Exception ex) {
                logger.error("Upload fail", ex);
                return null;
            } finally {
                if (storageServer != null) {
                    try {
                        storageServer.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (trackerServer != null) {
                    try {
                        trackerServer.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                storageClient1 = null;
            }
        }
    
        @Override
        public int delete(String fileId) {
    //        System.out.println("deleting ....");
            TrackerServer trackerServer = null;
            StorageServer storageServer = null;
            StorageClient1 storageClient1 = null;
            int index = fileId.indexOf('/');
            String groupName = fileId.substring(0, index);
            try {
                trackerServer = trackerClient.getConnection();
                if (trackerServer == null) {
                    logger.error("getConnection return null");
                }
                storageServer = trackerClient.getStoreStorage(trackerServer, groupName);
                storageClient1 = new StorageClient1(trackerServer, storageServer);
                int result = storageClient1.delete_file1(fileId);
                return result;
            } catch (Exception ex) {
                logger.error("Delete fail", ex);
                return 1;
            } finally {
                if (storageServer != null) {
                    try {
                        storageServer.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (trackerServer != null) {
                    try {
                        trackerServer.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                storageClient1 = null;
            }
        }
    
        @Override
        public void afterPropertiesSet() throws Exception {
            File confFile = File.createTempFile("fastdfs", ".conf");
            PrintWriter confWriter = new PrintWriter(new FileWriter(confFile));
            confWriter.println("tracker_server=" + trackerServer);
            confWriter.close();
            ClientGlobal.init(confFile.getAbsolutePath());
            confFile.delete();
            TrackerGroup trackerGroup = ClientGlobal.g_tracker_group;
            trackerClient = new TrackerClient(trackerGroup);
    
            logger.info("Init FastDFS with tracker_server : {}", trackerServer);
        }
    }

##### 文件存储服务工厂类 #####

import org.springframework.beans.factory.FactoryBean;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
    
    import java.util.HashMap;
    import java.util.Map;
    
    public class StorageFactory implements FactoryBean<StorageService> {
    
        @Autowired
        private AutowireCapableBeanFactory acbf;
    
        /**
         * 存储服务的类型，目前仅支持fastdfs
         */
        @Value("${storage.type}")
        private String type;
    
        private Map<String, Class<? extends StorageService>> classMap;
    
        public StorageFactory() {
            classMap = new HashMap<>();
            classMap.put("fastdfs", FastDFSStorageService.class);
        }
    
        @Override
        public StorageService getObject() throws Exception {
            Class<? extends StorageService> clazz = classMap.get(type);
            if (clazz == null) {
                throw new RuntimeException("Unsupported storage type [" + type + "], valid are " + classMap.keySet());
            }
    
            StorageService bean = clazz.newInstance();
            acbf.autowireBean(bean);
            acbf.initializeBean(bean, bean.getClass().getSimpleName());
            return bean;
        }
    
        @Override
        public Class<?> getObjectType() {
            return StorageService.class;
        }
    
        @Override
        public boolean isSingleton() {
            return true;
        }
    }

#### FastDFS 控制器 ####

--------------------

##### 云配置 #####

fastdfs.base.url: http://192.168.75.128:8888/
    storage:
      type: fastdfs
      fastdfs:
        tracker_server: 192.168.75.128:22122

###### 控制器 ######

import com.funtl.itoken.service.upload.fastdfs.StorageService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.CrossOrigin;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.multipart.MultipartFile;
    
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    @CrossOrigin(origins = "*", maxAge = 3600)
    @RestController
    public class UploadController {
        @Value("${fastdfs.base.url}")
        private String FASTDFS_BASE_URL;
    
        @Autowired
        private StorageService storageService;
    
        /**
         * 文件上传
         *
         * @param dropFile    Dropzone
         * @param editorFiles wangEditor
         * @return
         */
        @RequestMapping(value = "upload", method = RequestMethod.POST)
        public Map<String, Object> upload(MultipartFile multipartFile) {
            Map<String, Object> result = new HashMap<>();
            result.put("fileName", writeFile(multipartFile));
            return result;
        }
    
        /**
         * 将图片写入指定目录
         *
         * @param multipartFile
         * @return 返回文件完整路径
         */
        private String writeFile(MultipartFile multipartFile) {
            // 获取文件后缀
            String oName = multipartFile.getOriginalFilename();
            String extName = oName.substring(oName.lastIndexOf(".") + 1);
    
            // 文件存放路径
            String url = null;
            try {
                String uploadUrl = storageService.upload(multipartFile.getBytes(), extName);
                url = FASTDFS_BASE_URL + uploadUrl;
            } catch (IOException e) {
                e.printStackTrace();
            }
    
            // 返回文件完整路径
            return url;
        }
    }