Java fastdfs客户端实现上传下载文件

一、项目结构

二、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">
 <modelVersion>4.0.0</modelVersion>
 <groupId>org.example</groupId>
 <artifactId>A01fastdfs</artifactId>
 <version>1.0-SNAPSHOT</version>

<dependencies>
   <!-- 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>junit</groupId>
     <artifactId>junit</artifactId>
     <version>4.13</version>
     <scope>test</scope>
   </dependency>
   <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-io -->
   <dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-io</artifactId>
     <version>1.3.2</version>
   </dependency>
 </dependencies>

<build>
   <plugins>
     <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-compiler-plugin</artifactId>
       <configuration>
         <source>1.9</source>
         <target>1.9</target>
       </configuration>
     </plugin>
   </plugins>
 </build>
</project>

三、fastdfs-client.properties

#http连接超时时间
fastdfs.connect_timeout_in_seconds=5
#tracker和storage网络通信超时时间
fastdfs.network_timeout_in_seconds=30
#字符编码
fastdfs.charset=utf-8
#tracker服务器地址，多个地址中间用英文逗号分隔
fastdfs.tracker_servers=192.168.2.105:22122

四、测试

package com.wuxi.test;

import org.csource.fastdfs.*;
import org.junit.Test;

import java.io.File;
import java.io.FileOutputStream;

public class MyTest {
 //上传文件
 @Test
 public void testUpload() {
   try {
     //加载fastdfs-client.properties配置文件
     ClientGlobal.initByProperties("config/fastdfs-client.properties");
     //定义TrackerClient，用于请求TrackerServer
     TrackerClient trackerClient = new TrackerClient();
     //连接tracker
     TrackerServer trackerServer = trackerClient.getConnection();
     //获取storage
     StorageServer storeStorage = trackerClient.getStoreStorage(trackerServer);
     //创建storageClient
     StorageClient1 storageClient1 = new StorageClient1(trackerServer, storeStorage);
     //向storage服务器上传文件
     //本地文件的路径
     String path = "F:/java/resource/data.txt";
     //上传成功后拿到文件Id
     String fileId = storageClient1.upload_file1(path, "txt", null);
     System.out.println(fileId);//group1/M00/00/00/wKgCaV9vaSaARBTKAAAAGjJpL2g017.txt
   } catch (Exception e) {
     e.printStackTrace();
   }
 }

//下载文件
 @Test
 public void testDownload() {
   try {
     //加载fastdfs-client.properties配置文件
     ClientGlobal.initByProperties("config/fastdfs-client.properties");
     //定义TrackerClient，用于请求TrackerServer
     TrackerClient trackerClient = new TrackerClient();
     //连接tracker
     TrackerServer trackerServer = trackerClient.getConnection();
     //获取storage
     StorageServer storeStorage = trackerClient.getStoreStorage(trackerServer);
     //创建storageClient
     StorageClient1 storageClient1 = new StorageClient1(trackerServer, storeStorage);
     //下载文件
     //文件id
     String fileId = "group1/M00/00/00/wKgCaV9vaSaARBTKAAAAGjJpL2g017.txt";
     byte[] bytes = storageClient1.download_file1(fileId);
     //使用输出流保存文件
     FileOutputStream fileOutputStream = new FileOutputStream(new File("F:/data.txt"));
     fileOutputStream.write(bytes);
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
}

来源：https://www.cnblogs.com/linding/p/13737440.html