FastDFS分布文件系统Java客户端集成

参考博客：http://blog.csdn.net/xyang81/article/details/52847311

官网Java客户端源代码：

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

从上面地址下载压缩包，解压

使用idea工具打开执行clean install将包打到本地的maven仓库

如果协同开发，可将该包上传到公司的私服，供大家一起下载，就不需要下载该工程进行本地打包，只需要引pom地址

工程目录结构

根据官方提供的sdk封装了一个工具类

 package com.cky.fastdfsdemo;

 import com.cky.util.FileUtil;
 import org.apache.commons.io.IOUtils;
 import org.csource.common.NameValuePair;
 import org.csource.fastdfs.*;

 import java.io.*;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 /**
  * Created by chenkaiyang on 2017/11/30.
  */
 public class FastDFSClient {
     private static final String CONFIG_FILENAME = "src/main/resources/fdfs/fdfs_client.conf";
     private static StorageClient1 storageClient1 = null;

     // 初始化FastDFS Client
     static {
         try {
             ClientGlobal.init(CONFIG_FILENAME);
             TrackerClient trackerClient = new TrackerClient(ClientGlobal.g_tracker_group);
             TrackerServer trackerServer = trackerClient.getConnection();
             if (trackerServer == null) {
                 throw new IllegalStateException("getConnection return null");
             }

             StorageServer storageServer = trackerClient.getStoreStorage(trackerServer);
             if (storageServer == null) {
                 throw new IllegalStateException("getStoreStorage return null");
             }

             storageClient1 = new StorageClient1(trackerServer,storageServer);

         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     /**
      * 上传文件
      * @param file 文件对象
      * @param fileName 文件名
      * @return
      */
     public static String uploadFile(File file, String fileName) {
         return uploadFile(file,fileName,null);
     }

     /**
      * 上传文件
      * @param file 文件对象
      * @param fileName 文件名
      * @param metaList 文件元数据
      * @return
      */
     public static String uploadFile(File file, String fileName, Map<String,String> metaList) {
         try {
             byte[] buff = IOUtils.toByteArray(new FileInputStream(file));
             NameValuePair[] nameValuePairs = null;
             if (metaList != null) {
                 nameValuePairs = new NameValuePair[metaList.size()];
                 int index = 0;
                 for (Iterator<Map.Entry<String,String>> iterator = metaList.entrySet().iterator(); iterator.hasNext();) {
                     Map.Entry<String,String> entry = iterator.next();
                     String name = entry.getKey();
                     String value = entry.getValue();
                     nameValuePairs[index++] = new NameValuePair(name,value);
                 }
             }
             return storageClient1.upload_file1(buff, FileUtil.getExtensionName(fileName),nameValuePairs);
         } catch (Exception e) {
             e.printStackTrace();
         }
         return null;
     }

     /**
      * 获取文件元数据
      * @param fileId 文件ID
      * @return
      */
     public static Map<String,String> getFileMetadata(String fileId) {
         try {
             NameValuePair[] metaList = storageClient1.get_metadata1(fileId);
             if (metaList != null) {
                 HashMap<String,String> map = new HashMap<String, String>();
                 for (NameValuePair metaItem : metaList) {
                     map.put(metaItem.getName(),metaItem.getValue());
                 }
                 return map;
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
         return null;
     }

     /**
      * 删除文件
      * @param fileId 文件ID
      * @return 删除失败返回-1，否则返回0
      */
     public static int deleteFile(String fileId) {
         try {
             return storageClient1.delete_file1(fileId);
         } catch (Exception e) {
             e.printStackTrace();
         }
         return -1;
     }

     /**
      * 下载文件
      * @param fileId 文件ID（上传文件成功后返回的ID）
      * @param outFile 文件下载保存位置
      * @return
      */
     public static int downloadFile(String fileId, File outFile) {
         FileOutputStream fos = null;
         try {
             byte[] content = storageClient1.download_file1(fileId);
             fos = new FileOutputStream(outFile);
            // IOUtils.copy(content,fos);
             IOUtils.copy(new ByteArrayInputStream(content), fos);
             return 0;
         } catch (Exception e) {
             e.printStackTrace();
         } finally {
             if (fos != null) {
                 try {
                     fos.close();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
         }
         return -1;
     }

 }

Java客户端配置文件（fdfs_client.conf）：

connect_timeout = 10
network_timeout = 20
charset = UTF-8
http.tracker_http_port = 8080
http.anti_steal_token = no
http.secret_key = FastDFS1234567890

tracker_server = 192.168.0.204:22122

Java客户端文件上传、下载、删除和元数据获取测试FastDFSClientTest文件

 package com.cky.fastdfsdemo;

 import org.junit.Test;

 import java.io.File;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;

 /**
  * Created by chenkaiyang on 2017/11/30.
  */
 public class FastDFSClientTest {

     /**
      * 文件上传测试
      */
     @Test
     public void testUpload() {
         File file = new File("F:\\img\\edc.jpg");
         Map<String,String> metaList = new HashMap<String, String>();
         metaList.put("width","1024");
         metaList.put("height","768");
         metaList.put("author","陈冠希");
         metaList.put("date","20171130");
         String fid = FastDFSClient.uploadFile(file,file.getName(),metaList);
         System.out.println("upload local file " + file.getPath() + " ok, fileid=" + fid);
         //上传成功返回的文件ID： group1/M00/00/00/wKgAyVgFk9aAB8hwAA-8Q6_7tHw351.jpg
     }

     /**
      * 文件下载测试
      */
     @Test
     public void testDownload() {
         int r = FastDFSClient.downloadFile("group1/M00/00/00/wKgAzFogMFKAVgnMAABIYRjp760474.jpg", new File("F:\\cccDownloadFile_fid.jpg"));
         System.out.println(r == 0 ? "下载成功" : "下载失败");
     }

     /**
      * 获取文件元数据测试
      */
     @Test
     public void testGetFileMetadata() {
         Map<String,String> metaList = FastDFSClient.getFileMetadata("group1/M00/00/00/wKgAzFogMFKAVgnMAABIYRjp760474.jpg");
         for (Iterator<Map.Entry<String,String>> iterator = metaList.entrySet().iterator(); iterator.hasNext();) {
             Map.Entry<String,String> entry = iterator.next();
             String name = entry.getKey();
             String value = entry.getValue();
             System.out.println(name + " = " + value );
         }
     }

     /**
      * 文件删除测试
      */
     @Test
     public void testDelete() {
         int r = FastDFSClient.deleteFile("group1/M00/00/00/wKgAzFogMFKAVgnMAABIYRjp760474.jpg");
         System.out.println(r == 0 ? "删除成功" : "删除失败");
     }
 }

获取文件扩展名的工具类

FileUtils

 package com.cky.util;

 /**
  * Created by chenkaiyang on 2017/11/30.
  */
 public class FileUtil {
     /*
  * Java文件操作 获取文件扩展名
  *
  *  Created on: 2011-8-2
  *      Author: blueeagle
  */
     public static String getExtensionName(String filename) {
         if ((filename != null) && (filename.length() > 0)) {
             int dot = filename.lastIndexOf('.');
             if ((dot >-1) && (dot < (filename.length() - 1))) {
                 return filename.substring(dot + 1);
             }
         }
         return filename;
     }
     /*
      * Java文件操作 获取不带扩展名的文件名
      *
      *  Created on: 2011-8-2
      *      Author: blueeagle
      */
     public static String getFileNameNoEx(String filename) {
         if ((filename != null) && (filename.length() > 0)) {
             int dot = filename.lastIndexOf('.');
             if ((dot >-1) && (dot < (filename.length()))) {
                 return filename.substring(0, dot);
             }
         }
         return filename;
     }

 }

pom文件

 <dependency>
      <groupId>org.csource</groupId>
      <artifactId>fastdfs-client-java</artifactId>
      <version>1.27-SNAPSHOT</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-io</artifactId>
      <version>1.3.2</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
    </dependency>

附送项目地址