fastDFS分布式文件系统--文件上传/下载/查询完整代码实现

搭建环境

这里我们使用javaApi测试文件的上传，java版本的fastdfs-client地址在： https:///happyfish100/fastdfs-client-java，参考此工程编写测试用例。

1）创建maven工程

pom.xml

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<groupId>com.xuecheng</groupId>
<artifactId>test‐fastDSF</artifactId>
<version>1.0‐SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
</dependency>
<!‐‐ ‐client‐java ‐‐>
<dependency>
<groupId>net.oschina.zcx7878</groupId>
<artifactId>fastdfs‐client‐java</artifactId>
<version>1.27.0.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons‐io</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</parent>

2) 配置 文件

在classpath:config下创建fastdfs-client.properties文件

fastdfs.connect_timeout_in_seconds = 5 #http连接超时时间
fastdfs.network_timeout_in_seconds = 30 #tracker与storage网络通信超时时间
fastdfs.charset = UTF‐8 #字符编码
fastdfs.tracker_servers = 192.168.101.64:22122 #tracker服务器地址，多个地址中间用英文逗号分隔

文件上传

//上传文件
    @Test
    public void testUpload() {
        try {
            ClientGlobal.initByProperties("config/fastdfs‐client.properties");
            System.out.println("network_timeout=" + ClientGlobal.g_network_timeout + "ms");
            System.out.println("charset=" + ClientGlobal.g_charset);
            //创建客户端
            TrackerClient tc = new TrackerClient();
            //连接tracker Server
            TrackerServer ts = tc.getConnection();
            if (ts == null) {
                System.out.println("getConnection return null");
                return;
            }
            //获取一个storage server
            StorageServer ss = tc.getStoreStorage(ts);
            if (ss == null) {
                System.out.println("getStoreStorage return null");
            }
            //创建一个storage存储客户端
            StorageClient1 sc1 = new StorageClient1(ts, ss);
            NameValuePair[] meta_list = null; //new NameValuePair[0];
            String item = "C:\\Users\\admin\\Desktop\\1.png";
            String fileid;
            fileid = sc1.upload_file1(item, "png", meta_list);
            System.out.println("Upload local file " + item + " ok, fileid=" + fileid);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

文件查询

//查询文件
@Test
public void testQueryFile() throws IOException, MyException {
    ClientGlobal.initByProperties("config/fastdfs‐client.properties");
    TrackerClient tracker = new TrackerClient();
    TrackerServer trackerServer = tracker.getConnection();
    StorageServer storageServer = null;
    StorageClient storageClient = new StorageClient(trackerServer,storageServer);
    FileInfo fileInfo =     storageClient.query_file_info("group1","M00/00/01/wKhlQFrKBSOAW5AWAALcAg10vf4862.png");
    System.out.println(fileInfo);
}

文件下载

//下载文件
    @Test
    public void testDownloadFile() throws IOException, MyException {
        ClientGlobal.initByProperties("config/fastdfs‐client.properties");
        TrackerClient tracker = new TrackerClient();
        TrackerServer trackerServer = tracker.getConnection();
        StorageServer storageServer = null;
        StorageClient1 storageClient1 = new StorageClient1(trackerServer,
                storageServer);
        byte[] result =
                storageClient1.download_file1("group1/M00/00/01/wKhlQFrKBSOAW5AWAALcAg10vf4862.png");
        File file = new File("d:/1.png");
        FileOutputStream fileOutputStream = new FileOutputStream(file);
        fileOutputStream.write(result);
        fileOutputStream.close();
    }