FastDFS通过java上传文件到linux服务器,通过nginx进行查看

#一、FastDFS简介及系统环境搭建:点击进入
#二、FastDFS 配置 Nginx 模块及访问测试:点击进入

首先确保tracker 和 storage 启动

启动tracker服务:

/usr/bin/fdfs_trackerd /etc/fdfs/tracker.conf start

启动storage服务:

/usr/bin/fdfs_storaged /etc/fdfs/storage.conf start

查看监听:

netstat -lnpt|grep fdfs

在这里插入图片描述
如此linux服务算是启动完成
以下开始java代码

1.导入需要的坐标

  <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
  </dependency>
  <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>4.0.12</version>
  </dependency>
  
  <dependency>
            <groupId>org.csource</groupId>
            <artifactId>fastdfs-client-java</artifactId>
            <version>1.27-SNAPSHOT</version>
  </dependency>
  

如果 fastdfs-client-java 无法导入,需要安装源码到maven仓库,点击此处

2.启动类设置

@SpringBootApplication
public class FileUploadWebApplication {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(FileUploadWebApplication.class, args);
    }

    @Bean
    public TomcatServletWebServerFactory tomcatEmbedded() {
        TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
        tomcat.addConnectorCustomizers((TomcatConnectorCustomizer) connector -> {
            if ((connector.getProtocolHandler() instanceof AbstractHttp11Protocol<?>)) {
                //-1 means unlimited
                ((AbstractHttp11Protocol<?>) connector.getProtocolHandler()).setMaxSwallowSize(-1);
            }
        });
        return tomcat;
    }

tomcatEmbedded 这段代码是为了解决,上传文件大于10M出现连接重置的问题。此异常内容 GlobalException 也捕获不到。
FastDFS通过java上传文件到linux服务器,通过nginx进行查看_第1张图片

3.前端页面


xmlns:th="http://www.thymeleaf.org">

Spring Boot file upload example

"POST" action="/upload" enctype="multipart/form-data"> "file" name="file" />

"submit" value="Submit" />

展示结果页面




Spring Boot - Upload Status

{message}">

{message}"/>

放置的位置在resources下的static目录
FastDFS通过java上传文件到linux服务器,通过nginx进行查看_第2张图片

4.创建FastDFS工具类

public class FastDFSFile {
    private String name;
    private byte[] content;
    private String ext;
    private String md5;
    private String author;
    //省略getter、setter

创建fdfs_client.conf文件,进行配置

connect_timeout = 60
network_timeout = 60
charset = UTF-8
http.tracker_http_port = 8070
http.anti_steal_token = no
http.secret_key = 123456

tracker_server = 192.168.206.101:22122  ##换上linux上tracker的ip
package com.activity.FastDFS;

import cn.hutool.core.io.resource.ClassPathResource;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.*;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

public class FastDFSClient {
    private static org.slf4j.Logger logger = LoggerFactory.getLogger(FastDFSClient.class);

    /**
     * 封装 FastDFSClient 类,包含常用的上传、下载、删除等方法。
     * 首先在类加载的时候读取相应的配置信息,并进行初始化。
     */
    static {
        try {
            String filePath = new ClassPathResource("fdfs_client.conf").getFile().getAbsolutePath();;
            ClientGlobal.init(filePath);
        } catch (Exception e) {
            logger.error("FastDFS Client Init Fail!",e);
        }
    }

    /**
     * 文件上传
     * @param file
     * @return
     */
    public static String[] upload(FastDFSFile file) {
        logger.info("File Name: " + file.getName() + "File Length:" + file.getContent().length);

        NameValuePair[] meta_list = new NameValuePair[1];
        meta_list[0] = new NameValuePair("author", file.getAuthor());

        long startTime = System.currentTimeMillis();
        String[] uploadResults = null;
        StorageClient storageClient=null;
        try {
            storageClient = getTrackerClient();
            uploadResults = storageClient.upload_file(file.getContent(), file.getExt(), meta_list);
        } catch (IOException e) {
            logger.error("IO Exception when uploadind the file:" + file.getName(), e);
        } catch (Exception e) {
            logger.error("Non IO Exception when uploadind the file:" + file.getName(), e);
        }
        logger.info("upload_file time used:" + (System.currentTimeMillis() - startTime) + " ms");

        if (uploadResults == null && storageClient!=null) {
            logger.error("upload file fail, error code:" + storageClient.getErrorCode());
        }
        String groupName = uploadResults[0];
        String remoteFileName = uploadResults[1];

        logger.info("upload file successfully!!!" + "group_name:" + groupName + ", remoteFileName:" + " " + remoteFileName);
        return uploadResults;
    }

    /**
     * 使用 FastDFS 提供的客户端 storageClient 来进行文件上传,最后将上传结果返回。
     * 根据 groupName 和文件名获取文件信息。
     * @param groupName
     * @param remoteFileName
     * @return
     */
    public static FileInfo getFile(String groupName, String remoteFileName) {
        try {
            StorageClient storageClient = getTrackerClient();
            return storageClient.get_file_info(groupName, remoteFileName);
        } catch (IOException e) {
            logger.error("IO Exception: Get File from Fast DFS failed", e);
        } catch (Exception e) {
            logger.error("Non IO Exception: Get File from Fast DFS failed", e);
        }
        return null;
    }

    /**
     * 下载文件
     * @param groupName
     * @param remoteFileName
     * @return
     */
    public static InputStream downFile(String groupName, String remoteFileName) {
        try {
            StorageClient storageClient = getTrackerClient();
            byte[] fileByte = storageClient.download_file(groupName, remoteFileName);
            InputStream ins = new ByteArrayInputStream(fileByte);
            return ins;
        } catch (IOException e) {
            logger.error("IO Exception: Get File from Fast DFS failed", e);
        } catch (Exception e) {
            logger.error("Non IO Exception: Get File from Fast DFS failed", e);
        }
        return null;
    }

    /**
     * 删除文件
     * @param groupName
     * @param remoteFileName
     * @throws Exception
     */
    public static void deleteFile(String groupName, String remoteFileName)
            throws Exception {
        StorageClient storageClient = getTrackerClient();
        int i = storageClient.delete_file(groupName, remoteFileName);
        logger.info("delete file successfully!!!" + i);
    }

    public static StorageServer[] getStoreStorages(String groupName)
            throws IOException {
        TrackerClient trackerClient = new TrackerClient();
        TrackerServer trackerServer = trackerClient.getConnection();
        return trackerClient.getStoreStorages(trackerServer, groupName);
    }

    public static ServerInfo[] getFetchStorages(String groupName,
                                                String remoteFileName) throws IOException {
        TrackerClient trackerClient = new TrackerClient();
        TrackerServer trackerServer = trackerClient.getConnection();
        return trackerClient.getFetchStorages(trackerServer, groupName, remoteFileName);
    }

    public static String getTrackerUrl() throws IOException {
        return "http://"+getTrackerServer().getInetSocketAddress().getHostString()+":"+ ClientGlobal.getG_tracker_http_port()+"/";
    }

    private static StorageClient getTrackerClient() throws IOException {
        TrackerServer trackerServer = getTrackerServer();
        StorageClient storageClient = new StorageClient(trackerServer, null);
        return  storageClient;
    }

    private static TrackerServer getTrackerServer() throws IOException {
        TrackerClient trackerClient = new TrackerClient();
        TrackerServer trackerServer = trackerClient.getConnection();
        return  trackerServer;
    }
}

5.编写Controller

package com.activity.FastDFS;

import org.apache.catalina.TrackedWebResource;
import org.csource.common.MyException;
import org.csource.common.NameValuePair;
import org.csource.fastdfs.*;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author zhongxia
 * @create 2019/12/20
 */
@RequestMapping("/FastDFS")
@RestController
public class FastDfsDemo {

    private static org.slf4j.Logger logger = LoggerFactory.getLogger(FastDfsDemo.class);

    @GetMapping("/")
    public String index() {
        return "upload";
    }

    /**
     * 请求控制,调用上面方法saveFile(),上传成功之后,将文件的路径展示到页面
     * @param file
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/upload") //new annotation since 4.3
    public String singleFileUpload(@RequestParam("file") MultipartFile file,
                                   RedirectAttributes redirectAttributes) {
        if (file.isEmpty()) {
            redirectAttributes.addFlashAttribute("message", "Please select a file to upload");
            return "redirect:uploadStatus";
        }
        try {
            // Get the file and save it somewhere
            String path=saveFile(file);
            redirectAttributes.addFlashAttribute("message",
                    "You successfully uploaded '" + file.getOriginalFilename() + "'");
            redirectAttributes.addFlashAttribute("path",
                    "file path url '" + path + "'");
        } catch (Exception e) {
            logger.error("upload file failed",e);
        }
        return "redirect:/uploadStatus";
    }

    /**
     * 从 MultipartFile 中读取文件信息,然后使用 FastDFSClient 将文件上传到 FastDFS 集群中。
     * @param multipartFile
     * @return
     * @throws IOException
     */
    public String saveFile(MultipartFile multipartFile) throws IOException {
        String[] fileAbsolutePath={};
        String fileName=multipartFile.getOriginalFilename();
        String ext = fileName.substring(fileName.lastIndexOf(".") + 1);
        byte[] file_buff = null;
        InputStream inputStream=multipartFile.getInputStream();
        if(inputStream!=null){
            int len1 = inputStream.available();
            file_buff = new byte[len1];
            inputStream.read(file_buff);
        }
        inputStream.close();
        FastDFSFile file = new FastDFSFile(fileName, file_buff, ext);
        try {
            fileAbsolutePath = FastDFSClient.upload(file);  //upload to fastdfs
        } catch (Exception e) {
            logger.error("upload file Exception!",e);
        }
        if (fileAbsolutePath==null) {
            logger.error("upload file failed,please upload again!");
        }
        String path=FastDFSClient.getTrackerUrl()+fileAbsolutePath[0]+ "/"+fileAbsolutePath[1];
        return path;
    }



}

上面代码的意思就是,通过MultipartFile读取文件信息,如果文件为空跳转到结果页并给出提示;如果不为空读取文件流并写入到指定目录,最后将结果展示到页面。

MultipartFile是Spring上传文件的封装类,包含了文件的二进制流和文件属性等信息,在配置文件中也可对相关属性进行配置,基本的配置信息如下:

spring.http.multipart.enabled=true #默认支持文件上传.
spring.http.multipart.file-size-threshold=0 #支持文件写入磁盘.
spring.http.multipart.location= # 上传文件的临时目录
spring.http.multipart.max-file-size=1Mb # 最大支持文件大小
spring.http.multipart.max-request-size=10Mb # 最大支持请求大小
最常用的是最后两个配置内容,限制文件上传大小,上传时超过大小会抛出异常:

启动
FastDFS通过java上传文件到linux服务器,通过nginx进行查看_第3张图片
上传之后再控制台会看见我们上传图片的地址
在这里插入图片描述
这个地址就是存放在linux上
FastDFS通过java上传文件到linux服务器,通过nginx进行查看_第4张图片
在通过nginx访问
先看一下nginx的配置
FastDFS通过java上传文件到linux服务器,通过nginx进行查看_第5张图片

在这里插入图片描述
结束

你可能感兴趣的:(FastDFS)