利用SpringMVC进行文件的上传,并与FTP服务器进行对接

在项目的开发过程当中,文件的上传是常见的操作,此处做个记录,方便以后查
看。

一.流程分析

image.png

image.png

二 .SpringMVC文件上传

1.导入jar包

在web开发当中我们是使用Apache fileupload组件来实现文件的上传的,在SpringMVC当中对这个组件进行了封装,但是底层还是Apache fileupload组件,springmvc中由MultipartFile接口来实现文件上传,MultipartFile对象被用来接收要前端传过来的数据文件,SpringMVC会将发送的文件绑定到multipartFile对象上。

导入jar包
    commons-fileupload
    commons-io
    commons-io可以不用自己导入,maven会自动导入对应版本的jar
    
        commons-fileupload
        commons-fileupload
        1.3.2
    
   
 
         commons-io
         commons-io
         2.0.1
    

2.MultipartResolver解析

在SpringMVC当中使用MultipartFile对象作为参数,来接受前端传过来的文件,将文件写入到本地当中,实现文件的上传,要想使用该参数,还需要在SpringMVC的配置文件当中配置MultipartResolver。
    
    
         
        
        
    

3.coding

#####################使用SpringMVC##########################
@Controller
@RequestMapping("/manage/product")
public class ProductManagerController {

    @Autowired
    private IUserService iUserService;
    @Autowired
    private IFileService iFileService;
    //文件的上传,使用MultipartFile参数来接受要发送的数据文件,SpringMVC会将发送的文件绑定到multipartFile对象上
    @RequestMapping("upload.do")
    @ResponseBody
    public ServerResponse upload(HttpSession session, @RequestParam(value = "upload_file",required = false)MultipartFile multipartFile){
        User user= (User) session.getAttribute(Const.CURRENT_USER);
        if(user==null ){
            return ServerResponse.createByErrorMessage("用户未登陆,请先登陆");
        }
        if(!iUserService.checkUserRole(user).isSuccess()){
            return ServerResponse.createByErrorMessage("该用户不是管理员,无权限操作");
        }
        if(multipartFile.isEmpty()){
            return ServerResponse.createByErrorMessage("要上传的问文件为空");
        }
        //获取Servlet的上下文,表示要上传的地方是哪里
        String path=session.getServletContext().getRealPath("/WEB-INF/upload");
        String targetName=iFileService.upload(multipartFile,path);
      String targetFileName=iFileService.upload(file,path);
       // String url=PropertiesUtil.getProperty("ftp.server.http.prefix")+targetFileName;
       // Map fileMap= Maps.newHashMap();
       // fileMap.put("uri",targetFileName);
        //fileMap.put("url",url);
        //return ServerResponse.createBySuccess(fileMap);
        return ServerResponse.createBySuccess(targetName);
    }
}

###################使用富文本###################
    /**
     * 富文本当中对返回值有自己的要求,我们使用的富文本是simditor,所以按照simditor的要求返回,此处我们让返回值是一个Map即可,无需专门去创建一个simditor对象
     * https://simditor.tower.im/docs/doc-config.html
     * {
     *   "success": true/false,
     *   "msg": "error message", # optional
     *   "file_path": "[real file path]"
     * }
     * 除此之外对response也有要求:response.addHeader("Access-Control-Allow-Headers","X-File-Name");
     */
    @RequestMapping("rich_img_upload.do")
    @ResponseBody
    public Map richImgUpload(HttpSession session, @RequestParam(value = "upload_file",required = false)MultipartFile multipartFile, HttpServletResponse response){
        User user= (User) session.getAttribute(Const.CURRENT_USER);
        Map resultMap= Maps.newHashMap();
        if(user==null ){
            resultMap.put("success",false);
            resultMap.put("msg","用户未登陆,请先登陆");
            return resultMap;
        }
        if(!iUserService.checkUserRole(user).isSuccess()){
            resultMap.put("success",false);
            resultMap.put("msg","该用户不是管理员,无权限操作");
            return resultMap;
        }
        if(multipartFile.isEmpty()){
            resultMap.put("success",false);
            resultMap.put("msg","要上传的是空文件");
            return resultMap;
        }
        //获取Servlet的上下文,表示要上传的地方是哪里
        String path=session.getServletContext().getRealPath("/WEB-INF/upload");
        String targetName=iFileService.upload(multipartFile,path);
        if(StringUtils.isBlank(targetName)){
            resultMap.put("success",false);
            resultMap.put("msg","上传文件失败");
            return resultMap;
        }
       // String url=PropertiesUtil.getProperty("ftp.server.http.prefix")+targetFileName;
        resultMap.put("success",true);
        resultMap.put("msg","上传文件成功");
        //resultMap.put("file_path",url);
        resultMap.put("file_path",targetName);
        return resultMap;
    }



@Service("iFileService")
public class IFileServiceImpl implements IFileService {

    private static Logger logger= LoggerFactory.getLogger(IFileServiceImpl.class);

    public String upload(MultipartFile multipartFile,String path){
        String originalFilename=multipartFile.getOriginalFilename();
        String fileExtensionName=originalFilename.substring(originalFilename.lastIndexOf("."));
        String uploadFileName= UUID.randomUUID().toString()+fileExtensionName;
        File targetFile=new File(path,uploadFileName);
        if(!targetFile.exists()){
            targetFile.setWritable(true);//设置对文件的写权限
            targetFile.mkdirs();
        }
        try {
            multipartFile.transferTo(targetFile);//上传文件完成

            //todo 上传文件到发图片服务器(将根目录下的targetFile上传到FTP服务器上)
            // FTPUtil.uploadFile(Lists.newArrayList(targetFile));
            //todo 上传完毕后删除刚刚上传的文件,文件夹不会删除
            // targetFile.delete();
           
        } catch (IOException e) {
            logger.info("文件上传失败",e);
        }
        return targetFile.getName();
    }
}

三.上传文件到FTP服务器

package com.mmall.util;

import org.apache.commons.net.ftp.FTPClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;


public class FTPUtil {

    private static  final Logger logger = LoggerFactory.getLogger(FTPUtil.class);

    private static String ftpIp = PropertiesUtil.getProperty("ftp.server.ip");
    private static String ftpUser = PropertiesUtil.getProperty("ftp.user");
    private static String ftpPass = PropertiesUtil.getProperty("ftp.pass");

    private String ip;
    private int port;
    private String user;
    private String pwd;
    private FTPClient ftpClient;

    public FTPUtil(String ip,int port,String user,String pwd){
        this.ip = ip;
        this.port = port;
        this.user = user;
        this.pwd = pwd;
    }


    public static boolean uploadFile(List fileList) throws IOException {
        FTPUtil ftpUtil = new FTPUtil(ftpIp,21,ftpUser,ftpPass);
        logger.info("开始连接ftp服务器");
        /**
         * 注意此处的remotePath的根目录是我们设置的用户根目录(/ftpfile/mmall)
         * 此处是上传到/ftpfile/mmall/img下面,当然也可以直接写img,ftpClient会识别到根是/ftpfile/mmall
         * img这个文件夹如果不存在会存在在根下面,如果存在,但是没权限则不会写入(根目录也不会),此时授权即可:chmod xxx fileName
         */
        boolean result = ftpUtil.uploadFile("/img1",fileList);
        logger.info("结束连接ftp服务器,结束上传,上传结果:{}",result);
        return result;
    }

    private boolean uploadFile(String remotePath,List fileList) throws IOException {
        boolean uploaded = true;
        FileInputStream fis = null;
        //连接FTP服务器
        //ftpClient.enterLocalPassiveMode();
        if(connectServer(this.ip,this.port,this.user,this.pwd)){
            try {
                ftpClient.changeWorkingDirectory(remotePath);//相当与cd remotePath,相当于切换到remotePath目录下
                ftpClient.setBufferSize(1024);
                ftpClient.setControlEncoding("UTF-8");
                ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
                //ftpClient.enterLocalPassiveMode();
                for(File fileItem : fileList){
                    fis = new FileInputStream(fileItem);
                    ftpClient.storeFile(fileItem.getName(),fis);
                }

            } catch (IOException e) {
                logger.error("上传文件异常",e);
                uploaded = false;
                e.printStackTrace();
            } finally {
                fis.close();
                ftpClient.disconnect();
            }
        }
        return uploaded;
    }

    private boolean connectServer(String ip,int port,String user,String pwd){

        boolean isSuccess = false;
        ftpClient = new FTPClient();
        try {
            ftpClient.connect(ip);
            isSuccess = ftpClient.login(user,pwd);
        } catch (IOException e) {
            logger.error("连接FTP服务器异常",e);
        }
        return isSuccess;
    }

    public String getIp() {
        return ip;
    }
    public void setIp(String ip) {
        this.ip = ip;
    }
    public int getPort() {
        return port;
    }
    public void setPort(int port) {
        this.port = port;
    }
    public String getUser() {
        return user;
    }
    public void setUser(String user) {
        this.user = user;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public FTPClient getFtpClient() {
        return ftpClient;
    }
    public void setFtpClient(FTPClient ftpClient) {
        this.ftpClient = ftpClient;
    }
}

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