FastDFS：实现文件的上传、下载、删除、修改

 

1、maven项目中，在pom中添加 fastdfs_client 依赖

1.  
   #添加依赖
2.  
   <dependency>
3.  
   <groupId>org.csource</groupId>
4.  
   <artifactId>fastdfs-client-java</artifactId>
5.  
   <version>5.0.4</version>
6.  
   </dependency>
7.  
    
8.  
   #说明：
9.  
   #由于fastdfs-client-java jar包没有上传到中央仓库，所以需要下载源码进行maven编译再上传到私服，然
10.  
    #后通过私服下载或者通过jar包的形式进行下载

2、在src/main/resource 下创建 fdfs_client.conf 配置文件

1.  
   #fdfs_client.conf 配置
2.  
   connect_timeout = 10
3.  
   network_timeout = 30
4.  
   charset = UTF-8
5.  
   http.tracker_http_port = 8888
6.  
   http.anti_steal_token = no
7.  
   http.secret_key = FastDFS1234567890
8.  
    
9.  
   tracker_server = 100.98.22.253:22122
10.  
    #如果有多台服务，指定集群的IP
11.  
    #tracker_server = 192.168.10.250:22122

3、客户端代码实例

1.  
   package util;
2.  
    
3.  
   import java.io.ByteArrayInputStream;
4.  
   import java.io.File;
5.  
   import java.io.FileInputStream;
6.  
   import java.io.IOException;
7.  
   import java.io.InputStream;
8.  
    
9.  
   import org.apache.commons.lang3.StringUtils;
10.  
    import org.apache.log4j.Logger;
11.  
    import org.csource.common.NameValuePair;
12.  
    import org.csource.fastdfs.ClientGlobal;
13.  
    import org.csource.fastdfs.StorageClient1;
14.  
    import org.csource.fastdfs.StorageServer;
15.  
    import org.csource.fastdfs.TrackerClient;
16.  
    import org.csource.fastdfs.TrackerGroup;
17.  
    import org.csource.fastdfs.TrackerServer;
18.  
     
19.  
    /**
20.  
    *
21.  
    * <B>系统名称：</B><BR>
22.  
    * <B>模块名称：</B><BR>
23.  
    * <B>中文类名：</B>FastDFS分布式文件系统操作客户端<BR>
24.  
    * <B>概要说明：</B>FastDFS分布式文件系统操作客户端<BR>
25.  
    * @author bhz
26.  
    * @since 2013年11月10日
27.  
    */
28.  
    public class FastDFSClientUtils {
29.  
     
30.  
    private static final String CONF_FILENAME = Thread.currentThread().getContextClassLoader().getResource("fastdfs_client.conf").getPath();
31.  
     
32.  
    private static Logger logger = Logger.getLogger(FastDFSClientUtils.class);
33.  
     
34.  
     
35.  
    private static TrackerClient trackerClient;
36.  
     
37.  
     
38.  
    //加载文件
39.  
    static {
40.  
    try {
41.  
    ClientGlobal.init(CONF_FILENAME);
42.  
    TrackerGroup trackerGroup = ClientGlobal.g_tracker_group;
43.  
    trackerClient = new TrackerClient(trackerGroup);
44.  
    } catch (Exception e) {
45.  
    logger.error(e);
46.  
    }
47.  
    }
48.  
     
49.  
    /**
50.  
    * <B>方法名称：</B>上传方法<BR>
51.  
    * <B>概要说明：</B><BR>
52.  
    * @param file 文件
53.  
    * @param path 路径
54.  
    * @return 上传成功返回id，失败返回null
55.  
    */
56.  
    public static String upload(File file, String path) {
57.  
    TrackerServer trackerServer = null;
58.  
    StorageServer storageServer = null;
59.  
    StorageClient1 storageClient1 = null;
60.  
    FileInputStream fis = null;
61.  
    try {
62.  
    NameValuePair[] meta_list = null; // new NameValuePair[0];
63.  
    fis = new FileInputStream(file);
64.  
    byte[] file_buff = null;
65.  
    if (fis != null) {
66.  
    int len = fis.available();
67.  
    file_buff = new byte[len];
68.  
    fis.read(file_buff);
69.  
    }
70.  
     
71.  
    trackerServer = trackerClient.getConnection();
72.  
    if (trackerServer == null) {
73.  
    logger.error("getConnection return null");
74.  
    }
75.  
    storageServer = trackerClient.getStoreStorage(trackerServer);
76.  
    storageClient1 = new StorageClient1(trackerServer, storageServer);
77.  
    String fileid = storageClient1.upload_file1(file_buff, getFileExt(path), meta_list);
78.  
     
79.  
    return fileid;
80.  
    } catch (Exception ex) {
81.  
    logger.error(ex);
82.  
    return null;
83.  
    }finally{
84.  
    if (fis != null){
85.  
    try {
86.  
    fis.close();
87.  
    } catch (IOException e) {
88.  
    logger.error(e);
89.  
    }
90.  
    }
91.  
    if (storageServer != null){
92.  
    try {
93.  
    storageServer.close();
94.  
    } catch (IOException e) {
95.  
    e.printStackTrace();
96.  
    }
97.  
    }
98.  
    if (trackerServer != null){
99.  
    try {
100.  
     trackerServer.close();
101.  
     } catch (IOException e) {
102.  
     e.printStackTrace();
103.  
     }
104.  
     }
105.  
     storageClient1 = null;
106.  
     }
107.  
     }
108.  
      
109.  
     /**
110.  
     * <B>方法名称：</B>上传方法<BR>
111.  
     * <B>概要说明：</B><BR>
112.  
     * @param data 数据
113.  
     * @param path 路径
114.  
     * @return 上传成功返回id，失败返回null
115.  
     */
116.  
     public static String upload(byte[] data, String extName) {
117.  
     TrackerServer trackerServer = null;
118.  
     StorageServer storageServer = null;
119.  
     StorageClient1 storageClient1 = null;
120.  
     try {
121.  
     NameValuePair[] meta_list = null; // new NameValuePair[0];
122.  
      
123.  
     trackerServer = trackerClient.getConnection();
124.  
     if (trackerServer == null) {
125.  
     logger.error("getConnection return null");
126.  
     }
127.  
     storageServer = trackerClient.getStoreStorage(trackerServer);
128.  
     storageClient1 = new StorageClient1(trackerServer, storageServer);
129.  
     String fileid = storageClient1.upload_file1(data, extName, meta_list);
130.  
     return fileid;
131.  
     } catch (Exception ex) {
132.  
     logger.error(ex);
133.  
     return null;
134.  
     }finally{
135.  
     if (storageServer != null){
136.  
     try {
137.  
     storageServer.close();
138.  
     } catch (IOException e) {
139.  
     e.printStackTrace();
140.  
     }
141.  
     }
142.  
     if (trackerServer != null){
143.  
     try {
144.  
     trackerServer.close();
145.  
     } catch (IOException e) {
146.  
     e.printStackTrace();
147.  
     }
148.  
     }
149.  
     storageClient1 = null;
150.  
     }
151.  
     }
152.  
      
153.  
     /**
154.  
     * <B>方法名称：</B>下载方法<BR>
155.  
     * <B>概要说明：</B>通过文件id进行下载<BR>
156.  
     * @param fileId 文件id
157.  
     * @return 返回InputStream
158.  
     */
159.  
     public static InputStream download(String groupName, String fileId) {
160.  
     TrackerServer trackerServer = null;
161.  
     StorageServer storageServer = null;
162.  
     StorageClient1 storageClient1 = null;
163.  
     try {
164.  
     trackerServer = trackerClient.getConnection();
165.  
     if (trackerServer == null) {
166.  
     logger.error("getConnection return null");
167.  
     }
168.  
     storageServer = trackerClient.getStoreStorage(trackerServer, groupName);
169.  
     storageClient1 = new StorageClient1(trackerServer, storageServer);
170.  
     byte[] bytes = storageClient1.download_file1(fileId);
171.  
     InputStream inputStream = new ByteArrayInputStream(bytes);
172.  
     return inputStream;
173.  
     } catch (Exception ex) {
174.  
     logger.error(ex);
175.  
     return null;
176.  
     } finally {
177.  
     if (storageServer != null){
178.  
     try {
179.  
     storageServer.close();
180.  
     } catch (IOException e) {
181.  
     e.printStackTrace();
182.  
     }
183.  
     }
184.  
     if (trackerServer != null){
185.  
     try {
186.  
     trackerServer.close();
187.  
     } catch (IOException e) {
188.  
     e.printStackTrace();
189.  
     }
190.  
     }
191.  
     storageClient1 = null;
192.  
     }
193.  
     }
194.  
      
195.  
     /**
196.  
     * <B>方法名称：</B>删除方法<BR>
197.  
     * <B>概要说明：</B>根据id来删除一个文件<BR>
198.  
     * @param fileId 文件id
199.  
     * @return 删除成功返回0，非0则操作失败，返回错误代码
200.  
     */
201.  
     public static int delete(String groupName, String fileId) {
202.  
     TrackerServer trackerServer = null;
203.  
     StorageServer storageServer = null;
204.  
     StorageClient1 storageClient1 = null;
205.  
     try {
206.  
     trackerServer = trackerClient.getConnection();
207.  
     if (trackerServer == null) {
208.  
     logger.error("getConnection return null");
209.  
     }
210.  
     storageServer = trackerClient.getStoreStorage(trackerServer, groupName);
211.  
     storageClient1 = new StorageClient1(trackerServer, storageServer);
212.  
     int result = storageClient1.delete_file1(fileId);
213.  
     return result;
214.  
     } catch (Exception ex) {
215.  
     logger.error(ex);
216.  
     return 0;
217.  
     } finally {
218.  
     if (storageServer != null){
219.  
     try {
220.  
     storageServer.close();
221.  
     } catch (IOException e) {
222.  
     e.printStackTrace();
223.  
     }
224.  
     }
225.  
     if (trackerServer != null){
226.  
     try {
227.  
     trackerServer.close();
228.  
     } catch (IOException e) {
229.  
     e.printStackTrace();
230.  
     }
231.  
     }
232.  
     storageClient1 = null;
233.  
     }
234.  
     }
235.  
      
236.  
     /**
237.  
     * <B>方法名称：</B><BR>
238.  
     * <B>概要说明：</B><BR>
239.  
     * @param oldFileId 旧文件id
240.  
     * @param file 新文件
241.  
     * @param path 新文件路径
242.  
     * @return 上传成功返回id，失败返回null
243.  
     */
244.  
     public static String modify(String oldGroupName, String oldFileId, File file, String path) {
245.  
     String fileid = null;
246.  
     try {
247.  
     // 先上传
248.  
     fileid = upload(file, path);
249.  
     if (fileid == null) {
250.  
     return null;
251.  
     }
252.  
     // 再删除
253.  
     int delResult = delete(oldGroupName, oldFileId);
254.  
     if (delResult != 0) {
255.  
     return null;
256.  
     }
257.  
     } catch (Exception ex) {
258.  
     logger.error(ex);
259.  
     return null;
260.  
     }
261.  
     return fileid;
262.  
     }
263.  
      
264.  
     /**
265.  
     * <B>方法名称：</B>获取文件后缀名<BR>
266.  
     * <B>概要说明：</B>获取文件后缀名<BR>
267.  
     * @param fileName
268.  
     * @return 如："jpg"、"txt"、"zip" 等
269.  
     */
270.  
     private static String getFileExt(String fileName) {
271.  
     if (StringUtils.isBlank(fileName) || !fileName.contains(".")) {
272.  
     return "";
273.  
     } else {
274.  
     return fileName.substring(fileName.lastIndexOf(".") + 1);
275.  
     }
276.  
     }
277.  
     }

4、测试代码

1.  
   package util;
2.  
    
3.  
   import java.io.File;
4.  
   import java.io.InputStream;
5.  
    
6.  
   import org.apache.commons.io.FileUtils;
7.  
    
8.  
    
9.  
    
10.  
    public class FastDFSTest {
11.  
     
12.  
    /**
13.  
    * 上传
14.  
    */
15.  
    public static void upload() throws Exception {
16.  
    // id: group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
17.  
    // fastdfsBasePath = http://192.168.1.170/fastdfs
18.  
    // url: http://192.168.1.170/fastdfs/group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
19.  
    String path = System.getProperty("user.dir") + File.separatorChar + "source" + File.separatorChar + "001.jpg";
20.  
    File file = new File(path);
21.  
    String fileId = FastDFSClientUtils.upload(file, path);
22.  
    System.out.println("本地文件：" + path + "，上传成功！ 文件ID为：" + fileId);
23.  
    }
24.  
     
25.  
    /**
26.  
    * 下载
27.  
    */
28.  
    public static void download() throws Exception {
29.  
    // id: group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
30.  
    // url: http://192.168.1.170/fastdfs/group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg
31.  
    String fileId = "group1/M00/00/00/wKgBr1crUIuAJ22iAADHTIxNXeI872.jpg";
32.  
    InputStream inputStream = FastDFSClientUtils.download("group1", fileId);
33.  
    System.out.println(inputStream.available());
34.  
    String path = System.getProperty("user.dir") + File.separatorChar + "receive" + File.separatorChar + "001.jpg";
35.  
    System.out.println(path);
36.  
    //FileUtils.copyInputStreamToFile(inputStream, new File(path));
37.  
    }
38.  
     
39.  
    /**
40.  
    * 删除
41.  
    */
42.  
    public static void delete() throws Exception {
43.  
    String fileId = "group1/M00/00/00/wKgBr1crVnSAbI4sAAAeV2aU4jU126.jpg";
44.  
    int result = FastDFSClientUtils.delete("group1", fileId);
45.  
    System.out.println(result == 0 ? "删除成功" : "删除失败:" + result);
46.  
    }
47.  
     
48.  
     
49.  
     
50.  
    /**
51.  
    * @param args
52.  
    * @throws Exception
53.  
    */
54.  
    public static void main(String[] args) throws Exception {
55.  
     
56.  
     
57.  
    //upload();
58.  
    download();
59.  
    Thread.sleep(10000);
60.  
    download();
61.  
    Thread.sleep(10000);
62.  
    download();
63.  
    //delete();
64.  
     
65.  
    }
66.  
     
67.  
    }