分佈式文件系統 : fastDFS簡介及快速入門（二）

二、fastDFS入門

2.1fastDFS安裝

tracker和storage使用相同的安裝包，fastDFS的下載地址在：https://github.com/happyfish100/FastDFS，FastDFS是C語言開發，建議在linux上運行。安裝細節本篇博文就不做贅述了，感興趣的朋友可以評論區留言我會單獨寫一篇博文來介紹fastDFS在Linux中的安裝和配置。

2.2文件上傳下載測試

2.2.1搭建環境

這裏我們使用javaApi測試文件的上傳，java版本的fastdfs-client地址在：https://github.com/happyfish100/fastdfs-client-java，參考此工程編寫測試用例。

此工程採用SpringBoot創建，導入資料下邊的test-fastdfs.zip，下邊是一些配置文件介紹：

1）pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>xc-framework-parent</artifactId>
        <groupId>com.fastDFS</groupId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../xc-framework-parent/pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>
​
    <artifactId>test-fastdfs</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/net.oschina.zcx7878/fastdfs-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>
​
</project>

2) 配置文件

在classpath:config下創建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連接超時時間
fastdfs.network_timeout_in_seconds： #tracker與storage網絡通信超時時間
fastdfs.charset：#字符編碼
fastdfs.tracker_servers：tracker#服務器地址，多個地址中間用英文逗號分隔

2.2.2 文件上傳

//上傳文件
@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);
        //創建客戶端
        TrackerClient tc = new TrackerClient();
        //連接tracker Server
        TrackerServer ts = tc.getConnection();
        if (ts == null) {
            System.out.println("getConnection return null");
            return;
        }
        //獲取一個storage server
        StorageServer ss = tc.getStoreStorage(ts);
​
        //創建一個storage存儲客戶端
        StorageClient1 sc1 = new StorageClient1(ts, ss);
        //本地文件路徑
        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 文件查詢

 
//查詢文件
@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 文件下載

//下載文件
@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();
}