FastDFS文件上传下载流程

上传：

1. Client通过Tracker server查找可用的Storage server。

2. Tracker server向Client返回一台可用的Storage server的IP地址和端口号。

3. Client直接通过Tracker server返回的IP地址和端口与其中一台Storage server建立连接并进行文件上传。

4. 上传完成，Storage server返回Client一个文件ID，文件上传结束。

下载：

1. Client通过Tracker server查找要下载文件所在的的Storage server。

2. Tracker server向Client返回包含指定文件的某个Storage server的IP地址和端口号。

3. Client直接通过Tracker server返回的IP地址和端口与其中一台Storage server建立连接并指定要下载文件。

4. 下载文件成功。

java客户端

springboot项目引入依赖

<dependency>
    <groupId>com.github.tobato</groupId>
    <artifactId>fastdfs-client</artifactId>
</dependency>

配置类

package com.leyou.config;
 
import com.github.tobato.fastdfs.FdfsClientConfig;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableMBeanExport;
import org.springframework.context.annotation.Import;
import org.springframework.jmx.support.RegistrationPolicy;
 
@Configuration
@Import(FdfsClientConfig.class)
/**
 * 解决jmx重复注册bean的问题
  */
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FastClientImporter {
}

在yml中编写FastDFS的属性

测试：

package com.leyou.test;
 
import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.domain.ThumbImageConfig;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.leyou.LyUploadService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
 
@RunWith(SpringRunner.class)
@SpringBootTest(classes = LyUploadService.class)
public class FdfsTest {
 
    @Autowired
    private FastFileStorageClient storageClient;
 
    @Autowired
    private ThumbImageConfig thumbImageConfig;
 
    @Test
    public void testUpload() throws FileNotFoundException {
        File file = new File("G:\\LeYou\\upload\\spitter_logo_50.png");
        // 上传
        StorePath storePath = this.storageClient.uploadFile(
                new FileInputStream(file), file.length(), "png", null);
        // 带分组的路径
        System.out.println(storePath.getFullPath());
        // 不带分组的路径
        System.out.println(storePath.getPath());
    }
 
    @Test
    public void testUploadAndCreateThumb() throws FileNotFoundException {
        File file = new File("G:\\LeYou\\upload\\spitter_logo_50.png");
        // 上传并且生成缩略图
        StorePath storePath = this.storageClient.uploadImageAndCrtThumbImage(
                new FileInputStream(file), file.length(), "png", null);
        // 带分组的路径
        System.out.println(storePath.getFullPath());
        // 不带分组的路径
        System.out.println(storePath.getPath());
        // 获取缩略图路径
        String path = thumbImageConfig.getThumbImagePath(storePath.getPath());
        System.out.println(path);
    }
}

具体应用中上传

package com.leyou.upload.service.serviceimpl;

import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import com.leyou.upload.service.UploadService;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
 
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
 
@Service
public class UploadServiceImpl implements UploadService {
 
    @Autowired
    private FastFileStorageClient storageClient;
 
    private static final Logger logger= LoggerFactory.getLogger(UploadServiceImpl.class);
 
    /**
     *     支持上传的文件类型
     */
    private static final List<String> suffixes = Arrays.asList("image/png","image/jpeg","image/jpg");
 
 
    @Override
    public String upload(MultipartFile file) {
        /**
         * 1.图片信息校验
         *      1)校验文件类型
         *      2)校验图片内容
         * 2.保存图片
         *      1)生成保存目录
         *      2)保存图片
         *      3)拼接图片地址
         */
        try {
            String type = file.getContentType();
            if (!suffixes.contains(type)) {
                logger.info("上传文件失败，文件类型不匹配：{}", type);
                return null;
            }
            BufferedImage image = ImageIO.read(file.getInputStream());
            if (image == null) {
                logger.info("上传失败，文件内容不符合要求");
                return null;
            }
 
            StorePath storePath = this.storageClient.uploadFile(
                  file.getInputStream(), file.getSize(), getExtension(file.getOriginalFilename()), null);
       
            String url = "http://image.leyou.com/"+storePath.getFullPath();
            return url;
        }catch (Exception e){
            return null;
        }
    }
 
    public String getExtension(String fileName){
        return StringUtils.substringAfterLast(fileName,".");
    }
}