A quick start to fastdfs takes you three minutes to upload and download files to the ECS

Prerequisite ,linux install fastdfs, If it is not installed, please check the previous blog article to install , Otherwise it can't go on .
https://blog.csdn.net/csdnerM/article/details/125179633

First step , Download the source file

Download address ：https://codeload.github.com/happyfish100/fastdfs-client-java/zip/master
After decompression, it is a source file , So we need to pack it into one jar Pack and in your own maven Warehouse dereference .

The second step ,maven Quote in the project

After packaging, we see that the version is 1.29-SNAPSHOT, So we are maven Introduction in ：

The third step , To write fastdfs.conf file ：

tracker_server=127.0.0.1:22122

Fill in your server's ip and fastdfs The port of

Step four , Write a tool class , Realize the upload function

public static void upload() {
    
        TrackerServer ts = null;
        StorageServer ss = null;
        StorageClient sc = null;
        try {
    
            // Load profile , The purpose is to get all TrackerServer Address information for 
            ClientGlobal.init("fastdfs.conf");
            TrackerClient tc = new TrackerClient();
            ts = tc.getTrackerServer();
            ss = tc.getStoreStorage(ts);
            // establish Storage Client object of , You need to use this object to operate FastDFS, Upload, download and delete files 
            sc = new StorageClient(ts, ss);
            // Upload files to FastDFS
            // Parameters  1  The absolute path of the file to be uploaded on the local disk 
            // Parameters  2  Is the extension of the file to be uploaded 
            // Parameters  3  The attribute file for the file to be uploaded is usually null Do not upload , The attributes of these files, such as file size and type, usually need to be recorded in the database 
            // Returns an array of strings , The data in this array is very important and must be kept properly 
            // Be careful ： The first element in this array is where the file is located FastDFS Group name , The second element is the file in FastDFS Remote file name in 
            //  These two data usually need to be written into the database 
            String[] result = sc.upload_file("/Users/wangfugui/Downloads/20220529151321.png", "png", null);
            for (String str : result) {
    
                System.out.println(str);
            }

        } catch (IOException e) {
    
            e.printStackTrace();
        } catch (MyException e) {
    
            e.printStackTrace();
        } finally {
    
            if (sc != null) {
    
                try {
    
                    sc.close();
                } catch (IOException e) {
    
                    e.printStackTrace();
                }
            }
        }
    }

Step five , Write the download method

public static void download() {
    
        TrackerServer ts = null;
        StorageServer ss = null;
        StorageClient sc = null;
        try {
    
            // Load profile , The purpose is to get all TrackerServer Address information for 
            ClientGlobal.init("fastdfs.conf");
            TrackerClient tc = new TrackerClient();
            ts = tc.getTrackerServer();
            ss = tc.getStoreStorage(ts);
            // establish Storage Client object of , You need to use this object to operate FastDFS, Upload, download and delete files 
            sc = new StorageClient(ts, ss);
            int downloadFile = sc.download_file("group1", "M00/00/00/rBJzqmKgR4OACNHEABeAcCmFn1g961.png", "/Users/wangfugui/Downloads/ss.png");
            System.out.println(downloadFile);
        } catch (IOException e) {
    
            e.printStackTrace();
        } catch (MyException e) {
    
            e.printStackTrace();
        } finally {
    
            try {
    
                if (sc != null) {
    
                    sc.close();
                }
            } catch (IOException e) {
    
                e.printStackTrace();
            }
        }
    }

Step six , Write deletion method

 public static void delete() {
    
        TrackerServer ts = null;
        StorageServer ss = null;
        StorageClient sc = null;
        try {
    
            // Load profile , The purpose is to get all TrackerServer Address information for 
            ClientGlobal.init("fastdfs.conf");
            TrackerClient tc = new TrackerClient();
            ts = tc.getTrackerServer();
            ss = tc.getStoreStorage(ts);
            // establish Storage Client object of , You need to use this object to operate FastDFS, Upload, download and delete files 
            sc = new StorageClient(ts, ss);

            int deleteFile = sc.delete_file("group1", "M00/00/00/rBJzqmKgR4OACNHEABeAcCmFn1g961.png");
            System.out.println(deleteFile);
        } catch (IOException e) {
    
            e.printStackTrace();
        } catch (MyException e) {
    
            e.printStackTrace();
        } finally {
    
            try {
    
                if (sc != null) {
    
                    sc.close();
                }
            } catch (IOException e) {
    
                e.printStackTrace();
            }
        }
    }

Step seven , To write main Method to test

After uploading, an array is returned , What's inside looks like this ：

group1
M00/00/00/rBJzqmKgR4OACNHEABeAcCmFn1g961.png

Let's go to the /00/00/ Look inside the folder ：

Delete method , Pass in the group name and file path , You will find that the files in the server have been deleted ,
The download method passes in the group name and file path and local path , You can find that the download is successful ：


Warehouse address ：

https://gitee.com/WangFuGui-Ma/fastdfs-quickstart