简单的文件上传服务器（上传到FastDFS服务器）

现在文件服务器使用越来越多，其中FastDFS文件服务器非常出色，可以支持分布式存储，多文件系统集群和多主机备份

环境中使用的文件服务器为172.16.100.10，其中trackerd服务和storaged服务器为同一台主机

使用到的jar包为官方提供的包，下载地址为https://sourceforge.net/projects/fastdfs/files/?source=navbar

项目环境：maven项目

项目目录树

简单的文件上传服务器（上传到FastDFS服务器）

其中pom.xml的配置

<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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>uploadServer</groupId>

  <artifactId>uploadServer</artifactId>

  <packaging>war</packaging>

  <version>0.0.1-SNAPSHOT</version>

  <name>uploadServer Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->

    <dependency>

        <groupId>commons-fileupload</groupId>

        <artifactId>commons-fileupload</artifactId>

        <version>1.3.2</version>

    </dependency>

    <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->

    <dependency>

        <groupId>com.alibaba</groupId>

        <artifactId>fastjson</artifactId>

        <version>1.2.31</version>

    </dependency>

  </dependencies>

  <build>

    <finalName>uploadServer</finalName>

  </build>

</project>

web.xml

<!DOCTYPE web-app PUBLIC

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

  <display-name>Archetype Created Web Application</display-name>

<servlet>

    <servlet-name>uploadServlet</servlet-name>

    <servlet-class>com.uploadServer.servlet.UploadServlet</servlet-class>

</servlet>

<servlet-mapping>

    <servlet-name>uploadServlet</servlet-name>

    <url-pattern>/upload</url-pattern>

</servlet-mapping>

</web-app>

uploadServer.properties

## FastDFS\u6587\u4EF6\u670D\u52A1\u5668\u7684\u5730\u5740 ##

imgServerAddress = 172.16.100.10

## FastDFS\u6587\u4EF6\u670D\u52A1\u5668\u7684\u8BBF\u95EE\u7AEF\u53E3 ##

imgServerPort = 8090

fdfs_client.conf

connect_timeout = 2

network_timeout = 30

charset = UTF-8

http.tracker_http_port = 8090

http.anti_steal_token = no

http.secret_key = FastDFS1234567890

tracker_server=172.16.100.10:22122

UploadServlet.java

package com.uploadServer.servlet;

import java.io.IOException;

import java.io.InputStream;

import java.net.URL;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.Properties;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;

import org.apache.commons.fileupload.FileUploadException;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

import org.csource.fastdfs.ClientGlobal;

import org.csource.fastdfs.StorageClient;

import org.csource.fastdfs.StorageClient1;

import org.csource.fastdfs.StorageServer;

import org.csource.fastdfs.TrackerClient;

import org.csource.fastdfs.TrackerServer;

import com.alibaba.fastjson.JSON;

/**

 * 功能：上传文件到FastDFS文件服务器，并返回访问链接

 * @author djoker

 *

 */

public class UploadServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private TrackerClient trackerClient = null;

    private TrackerServer trackerServer = null;

    private StorageClient storageClient= null;

    private StorageServer storageServer= null;

    private StorageClient1 storageClient1= null;

    private Properties properties = null;

    private InputStream imgServerConf = null;

    @Override

    protected void doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        DiskFileItemFactory factory = new DiskFileItemFactory();

        ServletFileUpload upload = new ServletFileUpload(factory);

        Map<String, Object> putMap = new HashMap<String, Object>();

        try {

            //读取配置文件

            imgServerConf = this.getClass().getClassLoader().getResourceAsStream("uploadServer.properties");

            properties = new Properties();

            properties.load(imgServerConf);

            //获取FastDFS客户端的配置文件和初始化环境

            String conf = this.getClass().getClassLoader().getResource("fdfs_client.conf").getPath();

            ClientGlobal.init(conf);

            //从request中获取文件

            List<FileItem> items = upload.parseRequest(request);

            //循环文件集合

            int fileNum = 1;

            for(Iterator<FileItem> iter = items.iterator(); iter.hasNext();){

                FileItem item = iter.next();

                Map<String, Object> resMap = new HashMap<String, Object>();

                resMap.put("fileNum", fileNum);

                if(item.getSize() == 0){

                    resMap.put("code", -1);

                }else{

                    trackerClient = new TrackerClient();

                    trackerServer = trackerClient.getConnection();

                    storageClient1 = new StorageClient1(trackerServer, storageServer);

                    //上传后返回文件路径参数

                    String[] url = storageClient1.upload_file(item.get(), item.getName().substring(item.getName().indexOf(".") + 1, item.getName().length()), null);

                    //单个文件的返回信息

                    resMap.put("code", 0);

                    resMap.put("imgServerAddress", properties.getProperty("imgServerAddress"));

                    resMap.put("imgServerPort", properties.getProperty("imgServerPort"));

                    resMap.put("groupName", url[0]);

                    resMap.put("imgPath", url[1]);

                    resMap.put("fileName", item.getName());

                    resMap.put("imgUrl", "http://" + properties.getProperty("imgServerAddress")

                                + ":" + properties.getProperty("imgServerPort") + "/" + url[0]  + "/" + url[1]);

                }

                putMap.put(Integer.toString(fileNum), resMap);

                fileNum++;

            }

        } catch (FileUploadException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        //输出

        response.getWriter().println(JSON.toJSONString(putMap));

    }

}

前段jsp页面，upload.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"

    pageEncoding="ISO-8859-1"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>Insert title here</title>

</head>

<body>

<form action="upload" method="post" enctype="multipart/form-data">

    <input type="file" name="myfile"><br>

    <input type="file" name="myfile"><br>

    <input type="file" name="myfile"><br>

    <button type="submit">submit</button>

</form>

</body>

</html>