项目结构：
pom.xml文件添加配置：
<!-- fastdfs -->
<dependency>
<groupId>com.github.tobato</groupId>
<artifactId>fastdfs-client</artifactId>
<version>1.26.2</version>
</dependency>
application.yml添加配置：
#fastdfs 配置
fdfs:
so-timeout: 1500
connect-timeout: 600
thumb-image:
width: 150
height: 150
tracker-list:
- 10.3.10.173:22122
包含加载时间，连接时间，图片长宽高等字段。除了tracker-list:服务地址，其他的都不是必须的，其他具体配置这里不做详细解释。
文件上传html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
<h1 th:inlines="text">文件上传</h1>
<form action="upload" method="post" enctype="multipart/form-data">
<p>选择文件: <input type="file" name="fileName"/></p>
<p><input type="submit" value="提交"/></p>
</form>
</body>
</html>
在controller中访问html文件
/*
* 获取fileUploade.html页面
*/
@RequestMapping("file")
public String file(){
return "/fileUploade";
}
引入fastdfs配置
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;
/**
* 引入fastdfs配置
* Created huhu 1 on 2018/10/26.
*/
@Configuration
@Import(FdfsClientConfig.class)
@EnableMBeanExport(registration = RegistrationPolicy.IGNORE_EXISTING)
public class FdfsConfig {
}
FastDFS客户端包装类
package com.gsafety.webmagic.visualize.common.wrapper;
import com.github.tobato.fastdfs.domain.StorePath;
import com.github.tobato.fastdfs.proto.storage.DownloadByteArray;
import com.github.tobato.fastdfs.service.FastFileStorageClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.io.ByteArrayInputStream;
import java.io.IOException;
/**
* FastDFS客户端包装类
* Created by hu on 2018/10/26.
*/
@Component
public class FastDFSClientWrapper {
private final Logger logger = LoggerFactory.getLogger(FastDFSClientWrapper.class);
@Autowired
private FastFileStorageClient fastFileStorageClient;
/**
* 文件上传
* 最后返回fastDFS中的文件名称;group1/M00/01/04/CgMKrVvS0geAQ0pzAACAAJxmBeM793.doc
*
* @param bytes 文件字节
* @param fileSize 文件大小
* @param extension 文件扩展名
* @return fastDfs路径
*/
public String uploadFile(byte[] bytes, long fileSize, String extension) {
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
StorePath storePath = fastFileStorageClient.uploadFile(byteArrayInputStream, fileSize, extension, null);
System.out.println(storePath.getGroup() + "==" + storePath.getPath() + "======" + storePath.getFullPath());
return storePath.getFullPath();
}
/**
* 下载文件
* 返回文件字节流大小
* @param fileUrl 文件URL
* @return 文件字节
* @throws IOException
*/
public byte[] downloadFile(String fileUrl) throws IOException {
String group = fileUrl.substring(0, fileUrl.indexOf("/"));
String path = fileUrl.substring(fileUrl.indexOf("/") + 1);
DownloadByteArray downloadByteArray = new DownloadByteArray();
byte[] bytes = fastFileStorageClient.downloadFile(group, path, downloadByteArray);
return bytes;
}
}
实现真正文件上传和下载
import com.gsafety.webmagic.visualize.common.wrapper.FastDFSClientWrapper;
import com.gsafety.webmagic.visualize.service.DRFdfsUpAndDowService;
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.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLEncoder;
/**
* Created by 1 on 2018/10/26.
*/
@Service
public class DRFdfsUpAndDowServiceImpl implements DRFdfsUpAndDowService{
@Autowired
private FastDFSClientWrapper fastDFSClientWrapper;
private final Logger logger = LoggerFactory.getLogger(DRFdfsUpAndDowServiceImpl.class);
/**
* 文件上传
* 最后返回fastDFS中的文件名称;group1/M00/01/04/CgMKrVvS0geAQ0pzAACAAJxmBeM793.doc
* @param file 页面提交时文件
* @return
*/
public String uploadFile(MultipartFile file){
byte[] bytes = new byte[0];
try {
bytes = file.getBytes();
} catch (IOException e) {
logger.error("获取文件错误");
e.printStackTrace();
}
//获取源文件名称
String originalFileName = file.getOriginalFilename();
//获取文件后缀--.doc
String extension = originalFileName.substring(originalFileName.lastIndexOf(".") + 1);
String fileName = file.getName();
//获取文件大小
long fileSize = file.getSize();
System.out.println(originalFileName + "==" + fileName + "==" + fileSize + "==" + extension + "==" + bytes.length);
return fastDFSClientWrapper.uploadFile(bytes, fileSize, extension);
}
/**
* 文件下载
* @param fileUrl 当前对象文件名称
* @param response HttpServletResponse 内置对象
* @throws IOException
*/
public void downloadFile(String fileUrl, HttpServletResponse response) throws IOException {
byte[] bytes = fastDFSClientWrapper.downloadFile(fileUrl);
// 这里只是为了整合fastdfs，所以写死了文件格式。需要在上传的时候保存文件名。下载的时候使用对应的格式
response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode("sb.xlsx", "UTF-8"));
response.setCharacterEncoding("UTF-8");
ServletOutputStream outputStream = null;
try {
outputStream = response.getOutputStream();
outputStream.write(bytes);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
outputStream.flush();
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
具体每个类对应的位置，在项目结构中已经有体现。
亲测了没毛病，非常简单易懂，如果时新手，你可能要注意需要建立对应的数据库存放上传时文件的名称以便于在文件下载的时候方便查找。