分布式文件系统 : fastDFS简介及快速入门（二）

二、fastDFS入门

2.1fastDFS安装

tracker和storage使用相同的安装包，fastDFS的下载地址在：https://github.com/happyfish100/FastDFS，FastDFS是C语言开发，建议在linux上运行。安装细节本篇博文就不做赘述了，感兴趣的朋友可以评论区留言我会单独写一篇博文来介绍fastDFS在Linux中的安装和配置。

2.2文件上传下载测试

2.2.1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://github.com/happyfish100/fastdfs-client-java，参考此工程编写测试用例。

此工程采用SpringBoot创建，导入资料下边的test-fastdfs.zip，下边是一些配置文件介绍：

1）pom.xml

    
        xc-framework-parent
        com.fastDFS
        1.0-SNAPSHOT
        ../xc-framework-parent/pom.xml
    
    4.0.0
​
    test-fastdfs
    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
        
            net.oschina.zcx7878
            fastdfs-client-java
            1.27.0.0
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.apache.commons
            commons-io
            1.3.2
        
    
​

2) 配置文件

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

fastdfs.connect_timeout_in_seconds = 5
fastdfs.network_timeout_in_seconds = 30
fastdfs.charset = UTF-8 
fastdfs.tracker_servers = 192.168.101.65:22122  
​
fastdfs.connect_timeout_in_seconds： #http连接超时时间
fastdfs.network_timeout_in_seconds： #tracker与storage网络通信超时时间
fastdfs.charset：#字符编码
fastdfs.tracker_servers：tracker#服务器地址，多个地址中间用英文逗号分隔

2.2.2 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);
​
        //创建一个storage存储客户端
        StorageClient1 sc1 = new StorageClient1(ts, ss);
        //本地文件路径
        String item = "C:\\Users\\admin\\Desktop\\1.png";
        String fileid;
        fileid = sc1.upload_file1(item, "png", null);
​
        System.out.println("Upload local file " + item + " ok, fileid=" + fileid);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
}

2.2.3 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);
}

2.2.4 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();
}