41、Springboot 文件上传 采用Base64方式

引入依赖

    commons-net
    commons-net
    3.6


    net.coobird
    thumbnailator
    0.4.8


    net.sf.json-lib
    json-lib
    2.4
    jdk15

创建 Base64 工具类

package com.lill.test.utils;

import org.apache.commons.net.util.Base64;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.*;

public class BaseUtils {

    static BASE64Encoder encoder = new sun.misc.BASE64Encoder();
    static BASE64Decoder decoder = new sun.misc.BASE64Decoder();

    /**
     * 得到Base64 字符串
     */
    public static String getBase64String(File file) {
        FileInputStream fin = null;
        BufferedInputStream bin = null;
        ByteArrayOutputStream baos = null;
        BufferedOutputStream bout = null;
        try {
            // 建立读取文件的文件输出流
            fin = new FileInputStream(file);
            // 在文件输出流上安装节点流（更大效率读取）
            bin = new BufferedInputStream(fin);
            // 创建一个新的 byte 数组输出流，它具有指定大小的缓冲区容量
            baos = new ByteArrayOutputStream();
            // 创建一个新的缓冲输出流，以将数据写入指定的底层输出流
            bout = new BufferedOutputStream(baos);
            byte[] buffer = new byte[1024];
            int len = bin.read(buffer);
            while (len != -1) {
                bout.write(buffer, 0, len);
                len = bin.read(buffer);
            }
            // 刷新此输出流并强制写出所有缓冲的输出字节，必须这行代码，否则有可能有问题
            bout.flush();
            byte[] bytes = baos.toByteArray();
            return Base64.encodeBase64String(bytes).trim();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                fin.close();
                bin.close();
                // 关闭 ByteArrayOutputStream 无效。此类中的方法在关闭此流后仍可被调用，而不会产生任何 IOException
                // IOException
                // baos.close();
                bout.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
    /**
     * 将base64编码转换成文件
     */
    public static void base64StringToFile(String base64sString, String fileFullName) {
        BufferedInputStream bin = null;
        FileOutputStream fout = null;
        BufferedOutputStream bout = null;
        try {
            // 将base64编码的字符串解码成字节数组
            byte[] bytes = decoder.decodeBuffer(base64sString);
            // 创建一个将bytes作为其缓冲区的ByteArrayInputStream对象
            ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
            // 创建从底层输入流中读取数据的缓冲输入流对象
            bin = new BufferedInputStream(bais);
            // 指定输出的文件
            File file = new File(fileFullName);
            // 创建到指定文件的输出流
            fout = new FileOutputStream(file);
            // 为文件输出流对接缓冲输出流对象
            bout = new BufferedOutputStream(fout);
            byte[] buffers = new byte[1024];
            int len = bin.read(buffers);
            while (len != -1) {
                bout.write(buffers, 0, len);
                len = bin.read(buffers);
            }
            // 刷新此输出流并强制写出所有缓冲的输出字节，必须这行代码，否则有可能有问题
            bout.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                bin.close();
                fout.close();
                bout.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static InputStream base64StrToInputStream(String base64string) {
        ByteArrayInputStream stream = null;
        try {
            BASE64Decoder decoder = new BASE64Decoder();
            byte[] bytes1 = decoder.decodeBuffer(base64string);
            stream = new ByteArrayInputStream(bytes1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return stream;
    }
}

解除上传文件大小限制，在application.yml文件中做下简单配置

spring: 
  http: 
    multipart: 
      max-file-size: 512MB
      max-request-size: 4096MB
upload:
  image:
    url: D:/fileUpload/images/
  file:
    url: D:/fileUpload/files/

由于开发的是测试案例，所以大小给的随意了一些，具体请参照自身业务需要设定，另外，如果实际运行过程中，还会存在大小限制而无法上传的问题，请看下Tomcat或者Nginx配置，这也是我遇到过的情况，

Tomcat下文件上传大小，默认为2M（2097152），需要对server.xml做下修改

Nginx下文件上传大小，需要对nginx.conf做下修改

http{
    ……
    client_max_body_size 200M;
    ……
}

设置完大小限制之后，都要重新启动下，使其生效

创建上传ImageController类

package com.lill.test.controller;

import com.lill.test.common.Const;
import com.lill.test.dao.IFileParameterRepository;
import com.lill.test.entity.FileParameter;
import com.lill.test.threads.DelService;
import com.lill.test.threads.FtpService;
import com.lill.test.utils.*;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.*;
import java.util.Date;

@Controller
@RequestMapping("/image")
@CrossOrigin(origins = "*", maxAge = 3600)
public class ImageController {
    // 图片上传存储的路径
    @Value("${upload.image.url}")
    private String imageDir;

    @Value("${upload.file.url}")
    private String fileDir;

    private Logger logger = LoggerFactory.getLogger(ImageController.class);

    /**
     * FTP 相关配置
     */
    @Value("${ftp.username}")
    private String userName;

    @Value("${ftp.password}")
    private String passWord;

    @Value("${ftp.host}")
    private String ip;

    @Value("${ftp.port}")
    private int port;

    @Value("${ftp.filepath}")
    private String CURRENT_DIR;

    @PostMapping(value = "/uploadImageForBase64")
    @ResponseBody
    public JsonResult uploadImageForBase64(
            @RequestParam(value = "type", required = true) String type,
            @RequestParam(value = "fileBase", required = true) String fileBase,
            @RequestParam(value = "delPath", required = false, defaultValue = "") String delPath,
            HttpServletRequest request,
            HttpServletResponse response) throws FileNotFoundException {
        if(StringUtils.isBlank(fileBase)){
            return JsonResult.customize(Const.ERROR_CODE, "请先选择一张图片上传", null);
        }
        try {
            // 执行删除程序
            DelService delTask = new DelService(ip, port, userName, passWord, delPath);
            Thread d = new Thread(delTask);
            d.start();
        }catch (Exception e){

        }
        String ext = ".png";
        String fileName = GuidUtils.toLower();
        // 创建目录
        String relativePath = type.concat(Const.SPER).concat(DateUtils.getDate(new Date(), "yyyy/MM/dd"));
        File dir = new File(imageDir.concat(Const.SPER)+ relativePath);
        if(!dir.exists()){
            dir.mkdirs();
        }
        
        String newFileBase = "";
        if(fileBase.indexOf(",")>1) {
            newFileBase = fileBase.substring(fileBase.indexOf(",") + 1);
        }else{
            newFileBase = fileBase;
        }
        // 生产原图
        String normal = dir.getPath().concat(Const.SPER).concat(fileName).concat(ext);
        BaseUtils.base64StringToFile(newFileBase, normal);
        File file = new File(normal);
        // 生产中图
        String middle = dir.getPath().concat(Const.SPER).concat(fileName).concat(Const.IMG_MIDDLE).concat(ext);
        // 生产缩略图
        String thumb = dir.getPath().concat(Const.SPER).concat(fileName).concat(Const.IMG_THUMB).concat(ext);

        
        Runnable ftpTask = new FtpService(file, dir.getPath(), relativePath, fileName, ext,
                ip, port, userName, passWord);
        Thread t = new Thread(ftpTask);
        t.start();
        return JsonResult.ok("文件上传成功", entity);
    }

    private boolean isPic(String ext) {
        String _ext = ext.trim().toLowerCase();
        if(_ext.equals(".png")||_ext.equals(".jpeg")||_ext.equals(".jpg")||_ext.equals(".bmp")){
            return true;
        }else{
            return false;
        }
    }

    @GetMapping("/showImage")
    public void showImage(
            @RequestParam(value = "filePath", required = true) String filePath,
            HttpServletResponse response){
        try {
            showFtpImage(ip, port, userName, passWord, filePath, response);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @PostMapping("/deleteFileByPath")
    @ResponseBody
    public JsonResult deleteFileByPath(
            @RequestParam(value = "filePath", required = true) String filePath){
        delFtpImage(ip, port, userName, passWord, filePath);
        return JsonResult.ok("图片删除成功", null);
    }

    private void uploadFileToFtp(String ip, int port, String userName, String passWord, File file, String fileName, boolean needDelete, String relativePath){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            ftpUtils.getFTPClient(ip, port, userName, passWord);
            ftpUtils.uploadToFtp(new FileInputStream(file), fileName, needDelete, relativePath);
        } catch (Exception e) {

        }
    }

    private void showFtpImage(String ip, int port, String userName, String passWord, String filePath, HttpServletResponse response){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            FTPClient ftpClient = ftpUtils.getFTPClient(ip, port, userName, passWord);
            ftpClient.retrieveFile(filePath, response.getOutputStream());
        } catch (Exception e) {

        }
    }

    private void delFtpImage(String ip, int port, String userName, String passWord, String filePath){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            FTPClient ftpClient = ftpUtils.getFTPClient(ip, port, userName, passWord);
            ftpClient.deleteFile(filePath);
        } catch (Exception e) {

        }
    }


}

上面类中分别引用了工具类 JsonResult、FtpUtils、DateUtils, 请看后面内容，会逐个描述出来

创建JsonResult工具类

package com.lill.test.utils;

import com.alibaba.fastjson.JSON;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.lill.test.common.Const;

import java.io.Serializable;

@JsonInclude(JsonInclude.Include.ALWAYS)
public class JsonResult implements Serializable {

    private String code;

    private String message;

    private Object data;

    private JsonResult(){

    }

    private static JsonResult buildJsonResult(String code, String message, Object data){
        JsonResult result = new JsonResult();
        result.setCode(code);
        result.setMessage(message);
        result.setData(data);
        return result;
    }

    public static JsonResult ok(){
        return buildJsonResult("10000", "请求成功", null);
    }

    public static JsonResult ok(Object data){
        return buildJsonResult("10000", "请求成功", data);
    }

    public static JsonResult ok(String message, Object data){
        return buildJsonResult("10000", message, data);
    }

    public static JsonResult customize(String code, String message, Object data){
        return buildJsonResult(code, message, data);
    }

    public static JsonResult error(){
        return buildJsonResult(Const.ERROR_CODE, "请求失败", null);
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    
}

创建Const公共属性类

package com.lill.test.common;

public class Const {

    /**
     * 失败业务CODE
     */
    public final static String ERROR_CODE = "10001";

    /**
     * 统一异常CODE
     */
    public final static String WARN_CODE = "10002";

     /**
     * 图片（中图）标记
     */
    public final static String IMG_MIDDLE = "_middle";

    /**
     * 图片（缩略图）标记
     */
    public final static String IMG_THUMB = "_thumb";

    /**
     * 目录分隔符
     */
    public final static String SPER = "/";

}

创建DateUtils工具类

package com.lill.test.utils;

import org.apache.commons.lang.StringUtils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Random;
import java.util.TimeZone;

public class DateUtils {

    private static TimeZone shanghaiZone = TimeZone.getTimeZone("Asia/Shanghai");

    public static String getDate(){
        Calendar cal = Calendar.getInstance(shanghaiZone);
        return cal.get(Calendar.YEAR) + "/" + (cal.get(Calendar.MONTH) +1) + "/" + cal.get(Calendar.DATE);
    }

    public static String getLongDateString(){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String longdate = sdf.format(new Date());
        return longdate;
    }

    public static String random(long len) throws Exception {
        String[] arr = new String[]{"0","1","2","3","4","5","6","7","8","9"};
        if(len<=0){
            throw new Exception("长度有误");
        }
        String suffix = "";
        for (int i=0; i0) {
            Calendar c = Calendar.getInstance();
            c.setTime(curr);
            if (type == 1) {
                c.add(Calendar.MONTH, expire);
            } else if (type == 2) {
                c.add(Calendar.YEAR, expire);
            } else {
                c.add(Calendar.DATE, expire);
            }
            return c.getTime();
        }else{
            throw new Exception("过期间隔必须大于零");
        }
    }

    public static Date getDateTime(String datestr, String pattern) {
        if(StringUtils.isBlank(pattern)){
            pattern = "yyyy-MM-dd HH:mm:ss";
        }

        return getDate(datestr.replace(".0", ""), pattern);
    }

    public static String getDateTime(Date date, String pattern){
        if(StringUtils.isBlank(pattern)){
            pattern = "yyyy-MM-dd HH:mm:ss";
        }
        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
        return sdf.format(date);
    }

    public static String getDate(Date date, String pattern){
        if(StringUtils.isBlank(pattern)){
            pattern = "yyyy-MM-dd";
        }
        return getDateTime(date, pattern);
    }
}

创建FtpUtils工具类

package com.lill.test.utils;

import com.lill.test.common.Const;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.net.ftp.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class FtpUtils {

    private Logger logger = LoggerFactory.getLogger(FtpUtils.class);

    private static FtpUtils instance = null;

    private FtpUtils(){

    }

    public static FtpUtils getInstance(){
        instance = new FtpUtils();
        return instance;
    }

    // ftp客户端
    private FTPClient ftpClient = null;

    /**
     * 获取 Ftp连接对象
     * @param ip IP 地址
     * @param port 端口号
     * @param userName 账户
     * @param passWord 密码
     * @return
     * @throws IOException
     */
    public FTPClient getFTPClient(String ip, int port, String userName, String passWord) throws IOException {
        if (ftpClient==null) {
            int reply;
            try {
                ftpClient=new FTPClient();
                ftpClient.connect(ip,port);
                ftpClient.login(userName,passWord);
                reply = ftpClient.getReplyCode();
                if (!FTPReply.isPositiveCompletion(reply)) {
                    ftpClient.disconnect();
                }
                return ftpClient;
            }catch(Exception ex){
                throw ex;
            }
        }
        return null;
    }

    /**
     * 带点的
     * @param fileName
     * @return
     */
    public static String getExtention(String fileName) {
        int pos = fileName.lastIndexOf(".");
        return fileName.substring(pos);
    }
    /**
     * 不带点
     * @param fileName
     * @return
     */
    public static String getNoPointExtention(String fileName) {
        int pos = fileName.lastIndexOf(".");
        return fileName.substring(pos +1);
    }
    /**
     *
     * 功能：根据当前时间获取文件目录
     * @return String
     */
    public static String getDateDir(Date dateParam){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
        return sdf.format(dateParam);
    }

    /**
     * 设置传输文件的类型[文本文件或者二进制文件]
     *
     * @param fileType
     *            --BINARY_FILE_TYPE、ASCII_FILE_TYPE
     */
    private void setFileType(int fileType) {
        try {
            ftpClient.setFileType(fileType);
        } catch (Exception e) {

        }
    }

    /**
     *
     * 功能：关闭连接
     */
    public void closeConnect() {
        try {
            if (ftpClient != null) {
                ftpClient.logout();
                ftpClient.disconnect();
            }
        } catch (Exception e) {

        }
    }

    /**
     * 转码[GBK -> ISO-8859-1] 不同的平台需要不同的转码
     *
     * @param obj
     * @return
     */
    private String gbkToIso8859(Object obj) {
        try {
            if (obj == null)
                return "";
            else
                return new String(obj.toString().getBytes("GBK"), "iso-8859-1");
        } catch (Exception e) {
            return "";
        }
    }

    /**
     *
     * 功能：上传文件附件到文件服务器
     * @param buffIn:上传文件流
     * @param fileName：保存文件名称
     * @param needDelete：是否同时删除
     * @return
     * @throws IOException
     */
    public boolean uploadToFtp(InputStream buffIn, String fileName, boolean needDelete, String relativePath)
            throws FTPConnectionClosedException, IOException,Exception {
        boolean returnValue = false;
        // 上传文件
        try {
            // 设置传输二进制文件
            setFileType(FTP.BINARY_FILE_TYPE);
            int reply = ftpClient.getReplyCode();
            if(!FTPReply.isPositiveCompletion(reply))
            {
                ftpClient.disconnect();
                throw new IOException("Ftp连接失败");
            }
            ftpClient.enterLocalPassiveMode();
            // 支持动态创建多级目录
            createDir(relativePath);
            // 上传文件到ftp
            returnValue = ftpClient.storeFile(fileName, buffIn);
            if(needDelete){
                ftpClient.deleteFile(fileName);
            }
            // 输出操作结果信息
            if (returnValue) {
                System.out.println("文件上传成功");
            } else {
                System.out.println("文件上传失败");
            }
            buffIn.close();
            // 关闭连接
            closeConnect();
        } catch (Exception e) {
            returnValue = false;
            throw e;
        } finally {
            try {
                if (buffIn != null) {
                    buffIn.close();
                }
            } catch (Exception e) {

            }
            if (ftpClient.isConnected()) {
                closeConnect();
            }
        }
        return returnValue;
    }

    /**
     * 创建目录(有则切换目录，没有则创建目录)
     * @param dir
     * @return
     */
    public boolean createDir(String dir){
        String d;
        try {
            //目录编码，解决中文路径问题
            d = new String(dir.toString().getBytes("GBK"),"iso-8859-1");
            //尝试切入目录
            if(ftpClient.changeWorkingDirectory(d))
                return true;
            String[] arr =  dir.split(Const.SPER);
            StringBuffer sbfDir=new StringBuffer();
            //循环生成子目录
            for(String s : arr){
                sbfDir.append(Const.SPER);
                sbfDir.append(s);
                //目录编码，解决中文路径问题
                d = new String(sbfDir.toString().getBytes("GBK"),"iso-8859-1");
                //尝试切入目录
                if(ftpClient.changeWorkingDirectory(d))
                    continue;
                if(!ftpClient.makeDirectory(d)){
                    return false;
                }
            }
            //将目录切换至指定路径
            return ftpClient.changeWorkingDirectory(d);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }



}

创建 FtpService 线程类,用于处理图片文件传至FTP服务器

package com.lill.test.threads;

import com.lill.test.common.Const;
import com.lill.test.utils.FtpUtils;
import net.coobird.thumbnailator.Thumbnails;
import org.apache.commons.net.ftp.FTPClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class FtpService implements Runnable {

    private Logger logger = LoggerFactory.getLogger(FtpService.class);

    /**
     * 物理路径
     */
    private String physicalPath;

    /**
     * 相对路径
     */
    private String relativePath;

    /**
     * 文件名称（重命名后）
     */
    private String fileName;

    /**
     * 扩展名
     */
    private String ext;

    private File file;

    private String ip;

    private int port;

    private String userName;

    private String passWord;

    public FtpService(
            File file, String physicalPath, String relativePath, String fileName, String ext,
            String ip, int port, String userName, String passWord) {
        this.file = file;
        this.physicalPath = physicalPath;
        this.relativePath = relativePath;
        this.fileName = fileName;
        this.ext = ext;
        this.ip = ip;
        this.port = port;
        this.userName = userName;
        this.passWord = passWord;
    }

    public FtpService() {
    }

    @Override
    public void run() {
        try {

            // 上传至FTP
            uploadFileToFtp(ip, port, userName, passWord, file, fileName.concat(ext), false, relativePath);

            // 生产中图
            String middle = physicalPath.concat(Const.SPER).concat(fileName).concat(Const.IMG_MIDDLE).concat(ext);
            Thumbnails.of(file)
                    .scale(0.5)
                    .outputQuality(0.8)
                    .toFile(middle);

            File fileMiddle = new File(middle);

            // 上传至FTP
            uploadFileToFtp(ip, port, userName, passWord, fileMiddle, fileName.concat(Const.IMG_MIDDLE).concat(ext), false, relativePath);

            // 生产缩略图
            String thumb = physicalPath.concat(Const.SPER).concat(fileName).concat(Const.IMG_THUMB).concat(ext);
            Thumbnails.of(file)
                    .scale(0.25)
                    .outputQuality(0.8)
                    .toFile(thumb);

            File fileThumb = new File(thumb);

            // 上传至FTP
            uploadFileToFtp(ip, port, userName, passWord, fileThumb, fileName.concat(Const.IMG_THUMB).concat(ext), false, relativePath);

            // 删除临时文件
            file.delete();
            fileMiddle.delete();
            fileThumb.delete();
        } catch (IOException e) {
            e.printStackTrace();

        }
    }

    protected void uploadFileToFtp(String ip, int port, String userName, String passWord, File file, String fileName, boolean needDelete, String relativePath){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            ftpUtils.getFTPClient(ip, port, userName, passWord);
            ftpUtils.uploadToFtp(new FileInputStream(file), fileName, needDelete, relativePath);
        } catch (Exception e) {

        }
    }

    protected void showFtpImage(String ip, int port, String userName, String passWord, String filePath, HttpServletResponse response){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            FTPClient ftpClient = ftpUtils.getFTPClient(ip, port, userName, passWord);
            ftpClient.retrieveFile(filePath, response.getOutputStream());
        } catch (Exception e) {

        }
    }

    protected void delFtpImage(String ip, int port, String userName, String passWord, String filePath){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            FTPClient ftpClient = ftpUtils.getFTPClient(ip, port, userName, passWord);
            // 如果路径中包含中文，下面代码必定要写上
            String tmpfilePath = new String(filePath.getBytes("GBK"),"iso-8859-1");
            ftpClient.deleteFile(tmpfilePath);
        } catch (Exception e) {

        }
    }
}

创建DelService线程类，用于处理删除FTP服务器上的图片

package com.lill.test.threads;

import com.lill.test.common.Const;
import com.lill.test.utils.FtpUtils;
import com.lill.test.utils.NameUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.net.ftp.FTPClient;

public class DelService implements Runnable {

    private String ip;

    private int port;

    private String userName;

    private String passWord;

    private String delPath;

    public DelService() {
    }

    public DelService(String ip, int port, String userName, String passWord, String delPath) {
        this.ip = ip;
        this.port = port;
        this.userName = userName;
        this.passWord = passWord;
        this.delPath = delPath;
    }

    @Override
    public void run() {
        // 如果删除图片路径不为空，执行删除操作
        if (StringUtils.isNotBlank(delPath)) {
            if (delPath.indexOf("showImage") > 0) {
                String[] arr = delPath.split("=");
                String tmpExt = NameUtils.getFileExtension(arr[1]);
                // 将要被删除的原图地址
                String tmpfilePath = arr[1].replace(Const.IMG_MIDDLE, "").replace(Const.IMG_THUMB, "");
                delFtpImage(ip, port, userName, passWord, tmpfilePath);
                // 将要被删除的中图地址
                String tmpFileMiddle = tmpfilePath.replace(tmpExt, "").concat(Const.IMG_MIDDLE).concat(tmpExt);
                delFtpImage(ip, port, userName, passWord, tmpFileMiddle);
                // 将要删除的缩略图地址
                String tmpFileThumb = tmpfilePath.replace(tmpExt, "").concat(Const.IMG_THUMB).concat(tmpExt);
                delFtpImage(ip, port, userName, passWord, tmpFileThumb);

            } else {
                delFtpImage(ip, port, userName, passWord, delPath);
            }
        }
    }


    protected void delFtpImage(String ip, int port, String userName, String passWord, String filePath){
        try {
            FtpUtils ftpUtils = FtpUtils.getInstance();
            FTPClient ftpClient = ftpUtils.getFTPClient(ip, port, userName, passWord);
            // 如果路径中包含中文，下面代码必定要写上
            String tmpfilePath = new String(filePath.getBytes("GBK"),"iso-8859-1");
            ftpClient.deleteFile(tmpfilePath);
        } catch (Exception e) {

        }
    }
}

相关的示例代码，均在上面描述中，采用FTP方式处理图片的存储，Controller在接收到Base64数据之后，会在当前服务器上转化为原始图片，然后交给FtpService 线程类进行后续处理，线程类负责，将原始图片再另外生成 中图和缩略图，最后将这三张图片同时传至FTP进行存储，并在传输成功之后，删除应用服务器上临时生成的这三张图片。