fastdfs 介绍，安装，结合javaapi使用

具体介绍与安装看这个，一步步来

CentOS7 X64
用FastDFS一步步搭建文件管理系统

java api的使用。
maven项目
pom.xml

<dependencies>
    <dependency>
        <groupId>net.oschina.zcx7878</groupId>
        <artifactId>fastdfs-client-java</artifactId>
        <version>1.27.0.0</version>
    </dependency>
</dependencies>

fdfs_client.conf resources目录下的配置文件，只需要修改ip

connect_timeout = 2
network_timeout = 30
charset = UTF-8
http.tracker_http_port = 8080
http.anti_steal_token = no
http.secret_key = FastDFS1234567890

tracker_server = 192.168.163.132:22122

Upload.java 上传使用

package fastdfs;

import org.csource.common.NameValuePair;
import org.csource.fastdfs.*;

import java.io.*;

public class Upload {

    public static void main(String[] args) {

        try{
            ClientGlobal.init("fdfs_client.conf");
            TrackerClient trackerClient = new TrackerClient();
            TrackerServer trackerServer = trackerClient.getConnection();
            StorageServer storageServer = null;
            StorageClient storageClient = new StorageClient(trackerServer, storageServer);

            NameValuePair[] nameValuePairs = new NameValuePair[2];
            nameValuePairs[0] = new NameValuePair("file","filename");
            nameValuePairs[1] = new NameValuePair("file2","file2name");
            byte[] files = Upload.getBytes("fdfs_client.conf");
            String[] uploadResults = storageClient.upload_file(files,"txt",nameValuePairs);

            //数组0，group
            //数组1，文件路径
            for(String one:uploadResults)
            {
                System.out.println(one);
            }
        }catch (Exception e){
            e.printStackTrace();
        }

    }


    public static byte[] getBytes(String filePath){
        byte[] buffer = null;
        try {
            File file = new File(ClassLoader.getSystemResource(filePath).toURI());
            System.out.println(file.getAbsolutePath());
            ;
            FileInputStream fis = new FileInputStream(file);
            ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
            byte[] b = new byte[1000];
            int n;
            while ((n = fis.read(b)) != -1) {
                bos.write(b, 0, n);
            }
            fis.close();
            bos.close();
            buffer = bos.toByteArray();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }catch (Exception e){
            e.printStackTrace();
        }
        return buffer;
    }
}

Download.java 下载使用

package fastdfs;

import org.csource.common.NameValuePair;
import org.csource.fastdfs.*;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class Download {

    public static void main(String[] args) {
        String group="group1";
        String path="M00/00/00/wKijhFs8cdOAXHteAAAAvuh0edM875.txt";

        try{
            ClientGlobal.init("fdfs_client.conf");
            TrackerClient trackerClient = new TrackerClient();
            TrackerServer trackerServer = trackerClient.getConnection();
            StorageServer storageServer = null;
            StorageClient storageClient = new StorageClient(trackerServer, storageServer);

            byte[] bytes = storageClient.download_file(group,path);

            System.out.println(bytes.length);
            Download.toFile(bytes,".","test.txt");
        }catch (Exception e){
            e.printStackTrace();
        }
    }


    public static void toFile(byte[] bfile, String filePath,String fileName) {
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        File file = null;
        try {
            File dir = new File(filePath);
            if(!dir.exists()&&dir.isDirectory()){//判断文件目录是否存在
                dir.mkdirs();
            }
            file = new File(filePath+"//"+fileName);
            System.out.println(file.getAbsolutePath());
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(bfile);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
    }
}