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java版linux文件上传_java 上传文件到linux 重

java 上传文件到linux 重

工具类都放一个configss包了,方便使用
CommonEnum

package com.qhzx.mad.backstage.configss;

import lombok.Getter;
import lombok.Setter;

/**
 * @Description:
 * @Author: x
 * @Date :
 */

public enum CommonEnum {

    //成功

    SUCCESS_RESPONSE(200, "成功"),
    //失败

    FAILED_RESPONSE(400, "失败");

    @Setter
    @Getter
    private Integer code;

    @Setter
    @Getter
    private String msg;


    CommonEnum(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
    }
}
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DateUtils

package com.qhzx.mad.backstage.configss;

import io.swagger.models.auth.In;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

/**
 * @author: yc
 * @des: 时间工具类
 * @date: 2021/7/5 14:28
 */
public class DateUtils {

    //年月日格式
    private static final String Y_M_D = "yyyy-MM-dd";

    //年月日 时分秒格式
    private static final String Y_M_D_H_M_S = "yyyy-MM-dd HH:mm:ss";

    public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";

    /**
     * @author: yc
     * @des: 获取当前 年月日 时间字符串
     * @date: 2021/7/5 14:29
     */
    public static String getCurrentYMDStr() {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
        return sdf.format(new Date());
    }

    /**
     * @author: yc
     * @des: 获取当前 年月日-时分秒 时间字符串
     * @date: 2021/7/5 14:34
     */
    public static String getCurrentYMDHMSStr() {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
        return sdf.format(new Date());
    }

    /**
     * @author: yc
     * @des: 获取当前 年月日 date对象
     * @date: 2021/7/5 14:38
     */
    public static Date getCurrentYMDDate() {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
            return sdf.parse(getCurrentYMDStr());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @author: yc
     * @des: 获取当前 年月日-时分秒 date对象
     * @date: 2021/7/5 14:41
     */
    public static Date getCurrentYMDHMSDate() {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
            return sdf.parse(getCurrentYMDHMSStr());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @author: yc
     * @des: 根据某一时间字符串获取 年月日 date对象
     * @date: 2021/7/5 14:45
     */
    public static Date getCurrentYMDDate(String ymdTime) {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
            return sdf.parse(ymdTime);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @author: yc
     * @des: 根据某一时间获取 年月日-时分秒 date对象
     * @date: 2021/7/5 14:46
     */
    public static Date getCurrentYMDHMSDate(String ymdHmsTime) {
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
            return sdf.parse(ymdHmsTime);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @author: yc
     * @des: 将date对象转换为 年月日字符串
     * @date: 2021/7/5 15:36
     */
    public static String date2ymdStr(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
        return null == date ? "" : sdf.format(date);
    }

    /**
     * @author: yc
     * @des: 将date对象转换为 年月日-时分秒 字符串
     * @date: 2021/7/5 15:37
     */
    public static String date2ymdHmsStr(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
        return null == date ? "" : sdf.format(date);
    }

    /**
     * @author: yc
     * @des: 将某一 年月日字符串时间 转换为 年月日时分秒字符串
     * @date: 2021/7/5 15:54
     */
    public static String ymdStr2ymdHmsStr(String ymdTime) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
        return null == ymdTime ? "" : sdf.format(getCurrentYMDDate(ymdTime));
    }

    /**
     * @author: yc
     * @des: 将某一 年月日时分秒字符串 转换为 年月日字符串时间
     * @date: 2021/7/5 15:58
     */
    public static String ymdHmsStr2ymdStr(String ymdHmsTime) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
        return null == ymdHmsTime ? "" : sdf.format(getCurrentYMDHMSDate(ymdHmsTime));
    }

    /**
     * @author: yc
     * @des: 时间移动 根据某一 年月日时间字符串(time) 及 移动天数(moveDays) 得到移动后的 年月日时间字符串
     * moveNum > 0 -> 向后移 反之 -> 向前移
     * moveType = "移动维度" ->
     * Calendar.SECOND = "秒"
     * Calendar.MINUTE = "分"
     * Calendar.HOUR_OF_DAY = "时"
     * Calendar.DATE = "日"
     * Calendar.WEEK_OF_MONTH = "周"
     * Calendar.MONTH = "月"
     * Calendar.YEAR = "年"
     * @date: 2021/7/5 14:48
     */
    public static String getMoveYMDStrByTime(Integer moveNum, Integer moveType, String ymdTime) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D);
        Date date = null;
        try {
            date = sdf.parse(ymdTime);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.add(moveNum, moveType);
            date = calendar.getTime();
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return sdf.format(date);
    }

    /**
     * @author: yc
     * @des: 时间移动 根据某一 年月日-时分秒时间字符串(time) 及 移动天数(moveDays) 得到移动后的 年月日-时分秒时间字符串
     * moveNum > 0 -> 向后移 反之 -> 向前移
     * moveType = "移动维度" ->
     * Calendar.SECOND = "秒"
     * Calendar.MINUTE = "分"
     * Calendar.HOUR_OF_DAY = "时"
     * Calendar.DATE = "日"
     * Calendar.WEEK_OF_MONTH = "周"
     * Calendar.MONTH = "月"
     * Calendar.YEAR = "年"
     * @date: 2021/7/5 14:48
     */
    public static String getMoveYMDHMSStrByTime(Integer moveNum, Integer moveType, String ymdHmsTime) {
        SimpleDateFormat sdf = new SimpleDateFormat(Y_M_D_H_M_S);
        Date date = null;
        try {
            date = sdf.parse(ymdHmsTime);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.add(moveType, moveNum);
            date = calendar.getTime();
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return sdf.format(date);
    }

    /**
     * @author: yc
     * @des: 获取最近24小时List
     * @date: 2021/7/5 15:39
     */
    public static List<String> getLocal24Hour() {
        int mod = 24;
        String time = null;
        List<String> local24HourList = new ArrayList<>();
        String currentHour = getCurrentYMDHMSStr().substring(11, 13);
        for (int i = 1; i <= mod; i++) {
            time = String.valueOf((Integer.parseInt(currentHour) + i) % mod);
            String hourTime = Integer.parseInt(time) < 10 ? "0" + time + ":00" : time + ":00";
            String realDate = ymdHmsStr2ymdStr(getMoveYMDHMSStrByTime(i - mod, Calendar.HOUR_OF_DAY, getCurrentYMDHMSStr())) + " " + hourTime + ":00";
            local24HourList.add(realDate + "_" + hourTime);
        }
        return local24HourList;
    }

    /**
     * @author: yc
     * @des: 获取两个 年月日字符串时间 之间的 list 年月日事件对象
     * @date: 2021/7/5 16:01
     */
    public static List<String> getYMDListBetweenStartEndTime(String startTime, String endTime) {
        List<String> ymdList = new ArrayList<>();
        try {
            String currentTime = "";
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Calendar st = Calendar.getInstance();
            Calendar ed = Calendar.getInstance();
            st.setTime(sdf.parse(startTime));
            ed.setTime(sdf.parse(endTime));
            //按照天维度来拉取数据
            for (st.setTime(sdf.parse(startTime)); !st.after(ed); st.add(Calendar.DAY_OF_YEAR, 1)) {
                currentTime = sdf.format(st.getTime());
                ymdList.add(currentTime);
                System.out.println(currentTime);
            }
            return ymdList;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     *
     */
    /**
     * @author: yc
     * @des: 获取最近12个月
     * @date: 2021/7/5 16:03
     */
    public static List<String> getLast12Months() {
        List<String> last12MonthList = new ArrayList<>();
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + 1);
        cal.set(Calendar.DATE, 1);
        for (int i = 0; i < 12; i++) {
            cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1);
            last12MonthList.add(cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1 < 10 ? "0" + (cal.get(Calendar.MONTH) + 1) : String.valueOf(cal.get(Calendar.MONTH) + 1)));
        }
        return last12MonthList;
    }

    /**
     * @author: yc
     * @des: 转换unix时间格式
     * @date: 2021/7/28 16:49
     */
    public static String getTimestampDate(String timestamp) {
        String str;
        SimpleDateFormat unix_time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        str = unix_time.format(new Date(Long.valueOf(timestamp + "000")));
        return str;
    }

    /**
     * @author: yc
     * @des: 判断一个时间 是否在一个时间区间内
     * @date: 2021/8/23 9:24
     */
    public static boolean isBetween(Date current, Date startTime, Date endTime) {
        if (current.getTime() == startTime.getTime()
                || current.getTime() == endTime.getTime()) {
            return true;
        }
        Calendar date = Calendar.getInstance();
        date.setTime(current);
        Calendar begin = Calendar.getInstance();
        begin.setTime(startTime);
        Calendar end = Calendar.getInstance();
        end.setTime(endTime);
        if (date.after(begin) && date.before(end)) {
            return true;
        } else {
            return false;
        }
    }

    /**
     * @author: yc
     * @des: 判断 年月日 日期 在哪个季度
     * @date: 2021/7/9 11:16
     */
    public static Integer getQuarterByYMD(String ymdTime) {
        Integer currentMonth = Integer.parseInt(ymdTime.substring(5, 7));
        if (currentMonth >= 1 && currentMonth <= 3) {
            return 1;
        } else if (currentMonth >= 4 && currentMonth <= 6) {
            return 2;
        } else if (currentMonth >= 7 && currentMonth <= 9) {
            return 3;
        } else {
            return 4;
        }
    }

    public static final String dateTimeNow() {
        return dateTimeNow(YYYYMMDDHHMMSS);
    }

    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }

    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    /**
     //     * @author: yc
     //     * @des: 获取最近N个季度
     //     * @date: 2022/3/8 14:00
     //     */
//    public static List<String> getLocalQuarter(Integer n,String sort){
//        List<String> quarterList = new ArrayList<>();
//        String currentYMD = getCurrentYMDStr();
//        //当前季度
//        Integer currentQuarter = getQuarterByYMD(currentYMD);
//        //当前季度的最后一个年月日 如 2021年第二季度的最后一个月为 2021-06-01
//        String maxYMD = currentYMD.substring(0,4) + "-" + (currentQuarter * 3 < 10 ? "0" + currentQuarter * 3 : currentQuarter * 3) + "-01";
//        // 顺序
//        ActionUtils.doIfTrueOrNot("asc".equals(sort),() -> {
//            for(int i = n- 1; i >= 0 ;i--){
//                quarterList.add(getMoveYMDStrByTime(-i * 3 * 30,Calendar.getInstance().DATE,maxYMD).substring(0,7));
//            }
//        }, () -> {
//            for(int i = 0; i <= n-1; i++){
//                quarterList.add(getMoveYMDStrByTime(-i * 3 * 30,Calendar.getInstance().DATE,maxYMD).substring(0,7));
//            }
//        });
//        return quarterList;
//    }
}
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FileUploadUtils

package com.xiaoq.store.util;

import com.xiaoq.store.config.ProjectConfig;
import org.apache.tomcat.util.http.fileupload.impl.FileSizeLimitExceededException;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import java.util.Objects;

/**
 * 文件上传工具类
 *
 * @author ruoyi
 */
public class FileUploadUtils {
    /**
     * 默认大小 50M
     */
    public static final long DEFAULT_MAX_SIZE = 50 * 1024 * 1024;

    /**
     * 默认的文件名最大长度 100
     */
    public static final int DEFAULT_FILE_NAME_LENGTH = 100;

    /**
     * 根据文件路径上传
     *
     * @param baseDir 相对应用的基目录
     * @param file    上传的文件
     * @return 文件名称
     * @throws IOException
     */
    public static final String upload(String baseDir, MultipartFile file) throws IOException {
        try {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        } catch (Exception e) {
            throw new IOException(e.getMessage(), e);
        }
    }

    /**
     * 文件上传
     *
     * @param baseDir          相对应用的基目录
     * @param file             上传的文件
     * @param allowedExtension 上传文件类型
     * @return 返回上传成功的文件名
     * @throws FileSizeLimitExceededException 如果超出最大大小
     * @throws IOException                    比如读写文件出错时
     */
    public static final String upload(String baseDir, MultipartFile file, String[] allowedExtension)
            throws IOException {

        String fileName = extractFilename(file);

        String absPath = getAbsoluteFile(baseDir, fileName).getAbsolutePath();
        file.transferTo(Paths.get(absPath));
        return getPathFileName(baseDir, fileName);
    }

    /**
     * 编码文件名
     */
    public static final String extractFilename(MultipartFile file) {

        return "2022/06/22"  + Seq.getId(Seq.uploadSeqType) + getExtension(file);
    }

    public static final File getAbsoluteFile(String uploadDir, String fileName) throws IOException {
        File desc = new File(uploadDir + File.separator + fileName);

        if (!desc.exists()) {
            if (!desc.getParentFile().exists()) {
                desc.getParentFile().mkdirs();
            }
        }
        return desc;
    }

    public static final String getPathFileName(String uploadDir, String fileName) throws IOException {
        int dirLastIndex = ProjectConfig.getProfile().length() + 1;
        String currentDir = uploadDir.substring(dirLastIndex);
        return ProjectConfig.RESOURCE_PREFIX + "/" + currentDir + "/" + fileName;
    }


    /**
     * 获取文件名的后缀
     *
     * @param file 表单文件
     * @return 后缀名
     */
    public static final String getExtension(MultipartFile file) {
        String extension = file.getOriginalFilename();

        if (StringUtils.isEmpty(extension)) {
            extension = MimeTypeUtils.getExtension(Objects.requireNonNull(file.getContentType()));
        }
        return extension;
    }
}

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FileUtils

package com.qhzx.util;


import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;

/**
 * 文件处理工具类
 * 
 * @author ruoyi
 */
public class FileUtils
{
    public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";


    /**
     * 百分号编码工具方法
     *
     * @param s 需要百分号编码的字符串
     * @return 百分号编码后的字符串
     */
    public static String percentEncode(String s) throws UnsupportedEncodingException
    {
        String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
        return encode.replaceAll("\\+", "%20");
    }

    /**
     * 获取图像后缀
     * 
     * @param photoByte 图像数据
     * @return 后缀名
     */
    public static String getFileExtendName(byte[] photoByte)
    {
        String strFileExtendName = "jpg";
        if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56)
                && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97))
        {
            strFileExtendName = "gif";
        }
        else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70))
        {
            strFileExtendName = "jpg";
        }
        else if ((photoByte[0] == 66) && (photoByte[1] == 77))
        {
            strFileExtendName = "bmp";
        }
        else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71))
        {
            strFileExtendName = "png";
        }
        return strFileExtendName;
    }

    /**
     * 获取文件名称 /profile/upload/2022/04/16/ruoyi.png -- ruoyi.png
     * 
     * @param fileName 路径名称
     * @return 没有文件路径的名称
     */
    public static String getName(String fileName)
    {
        if (fileName == null)
        {
            return null;
        }
        int lastUnixPos = fileName.lastIndexOf('/');
        int lastWindowsPos = fileName.lastIndexOf('\\');
        int index = Math.max(lastUnixPos, lastWindowsPos);
        return fileName.substring(index + 1);
    }
}



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MimeTypeUtils

package com.qhzx.mad.backstage.configss;

/**
 * 媒体类型工具类
 * 
 * @author ruoyi
 */
public class MimeTypeUtils
{
    public static final String IMAGE_PNG = "image/png";

    public static final String IMAGE_JPG = "image/jpg";

    public static final String IMAGE_JPEG = "image/jpeg";

    public static final String IMAGE_BMP = "image/bmp";

    public static final String IMAGE_GIF = "image/gif";
    
    public static final String[] IMAGE_EXTENSION = { "bmp", "gif", "jpg", "jpeg", "png" };

    public static final String[] FLASH_EXTENSION = { "swf", "flv" };

    public static final String[] MEDIA_EXTENSION = { "swf", "flv", "mp3", "wav", "wma", "wmv", "mid", "avi", "mpg",
            "asf", "rm", "rmvb" };

    public static final String[] VIDEO_EXTENSION = { "mp4", "avi", "rmvb" };

    public static final String[] DEFAULT_ALLOWED_EXTENSION = {
            // 图片
            "bmp", "gif", "jpg", "jpeg", "png",
            // word excel powerpoint
            "doc", "docx", "xls", "xlsx", "ppt", "pptx", "html", "htm", "txt",
            // 压缩文件
            "rar", "zip", "gz", "bz2",
            // 视频格式
            "mp4", "avi", "rmvb",
            // pdf
            "pdf" };

    public static String getExtension(String prefix)
    {
        switch (prefix)
        {
            case IMAGE_PNG:
                return "png";
            case IMAGE_JPG:
                return "jpg";
            case IMAGE_JPEG:
                return "jpeg";
            case IMAGE_BMP:
                return "bmp";
            case IMAGE_GIF:
                return "gif";
            default:
                return "";
        }
    }
}
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ProjectConfig

package com.qhzx.mad.backstage.configss;

public class ProjectConfig {

    /**
     * 上传路径
     */
    private static final String profile = "/home/statics";
    //private static final String profile = "/www/wwwroot/27.124.20.74/images";

    /**
     * 资源映射路径 前缀
     */
    //public static final String RESOURCE_PREFIX = "/profile";
    public static final String RESOURCE_PREFIX = "";

    public static String getProfile() {
        return profile;
    }

    /**
     * 获取上传路径
     */
    public static String getUploadPath() {
        return profile + "/upload";
    }
}
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Result

package com.qhzx.mad.backstage.configss;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.*;
import lombok.experimental.Accessors;

import java.io.Serializable;
import static com.qhzx.mad.backstage.configss.CommonEnum.FAILED_RESPONSE;
import static com.qhzx.mad.backstage.configss.CommonEnum.SUCCESS_RESPONSE;

/**
 * @Description:响应结果集
 * @Author: x
 * @Date :
 */
@ToString
@NoArgsConstructor
@AllArgsConstructor
@Accessors(chain = true)
@ApiModel(description = "响应信息主体")
@Data
public class Result<T>  implements Serializable {
    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "返回标记:成功标记=200,失败标记=400")
    private int code;

    @ApiModelProperty(value = "返回信息")
    private String msg;

    @ApiModelProperty(value = "数据")
    private T data;

    /**
     * 成功
     */
    public static <T> Result<T> succeed() {
        return restResult(null, SUCCESS_RESPONSE.getCode(), null);
    }

    public static <T> Result<T> succeed(T data) {
        return restResult(data, SUCCESS_RESPONSE.getCode(), null);
    }

    public static <T> Result<T> succeed(T data, String msg) {
        return restResult(data, SUCCESS_RESPONSE.getCode(), msg);
    }

    public static <T> Result<T> succeed(String msg) {
        return restResult(null, SUCCESS_RESPONSE.getCode(), msg);
    }

    /**
     * 响应返回结果
     *
     * @param rows 影响行数
     * @return 操作结果
     */
    public static Result toAjax(int rows) {
        return rows > 0 ? succeed() : fail(FAILED_RESPONSE.getCode(), "修改失败!请检查参数");
    }

    /**
     * 失败
     */

    public static <T> Result<T> fail(int code, String msg) {
        return restResult(null, code, msg);
    }

    /**
     * 失败
     */
    public static <T> Result<T> fail(String msg) {
        return restResult(null, FAILED_RESPONSE.getCode(), msg);
    }


    private static <T> Result<T> restResult(T data, int code, String msg) {
        Result<T> apiResult = new Result<>();
        apiResult.setCode(code);
        apiResult.setData(data);
        apiResult.setMsg(msg);
        return apiResult;
    }

    public Result(CommonEnum commonEnum, T data) {
        this.code = commonEnum.getCode();
        this.msg = commonEnum.getMsg();
        this.data = data;
    }

    public Result(CommonEnum commonEnum) {
        this.code = commonEnum.getCode();
        this.msg = commonEnum.getMsg();
    }

    public Result<T> setData(T data) {
        this.data = data;
        return this;
    }
}

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Seq

package com.qhzx.mad.backstage.configss;


import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author ruoyi 序列生成类
 */
public class Seq {
    // 通用序列类型
    public static final String commSeqType = "COMMON";

    // 上传序列类型
    public static final String uploadSeqType = "UPLOAD";

    // 通用接口序列数
    private static AtomicInteger commSeq = new AtomicInteger(1);

    // 上传接口序列数
    private static AtomicInteger uploadSeq = new AtomicInteger(1);

    // 机器标识
    private static String machineCode = "A";

    /**
     * 获取通用序列号
     *
     * @return 序列值
     */
    public static String getId() {
        return getId(commSeqType);
    }

    /**
     * 默认16位序列号 yyMMddHHmmss + 一位机器标识 + 3长度循环递增字符串
     *
     * @return 序列值
     */
    public static String getId(String type) {
        AtomicInteger atomicInt = commSeq;
        if (uploadSeqType.equals(type)) {
            atomicInt = uploadSeq;
        }
        return getId(atomicInt, 3);
    }

    /**
     * 通用接口序列号 yyMMddHHmmss + 一位机器标识 + length长度循环递增字符串
     *
     * @param atomicInt 序列数
     * @param length    数值长度
     * @return 序列值
     */
    public static String getId(AtomicInteger atomicInt, int length) {
        String result = DateUtils.dateTimeNow();
        result += machineCode;
        result += getSeq(atomicInt, length);
        return result;
    }

    /**
     * 序列循环递增字符串[1, 10 的 (length)幂次方), 用0左补齐length位数
     *
     * @return 序列值
     */
    private synchronized static String getSeq(AtomicInteger atomicInt, int length) {
        // 先取值再+1
        int value = atomicInt.getAndIncrement();

        // 如果更新后值>=10 的 (length)幂次方则重置为1
        int maxSeq = (int) Math.pow(10, length);
        if (atomicInt.get() >= maxSeq) {
            atomicInt.set(1);
        }
        // 转字符串,用0左补齐
        return padl(value, length);
    }

    /**
     * 数字左边补齐0,使之达到指定长度。注意,如果数字转换为字符串后,长度大于size,则只保留 最后size个字符。
     *
     * @param num  数字对象
     * @param size 字符串指定长度
     * @return 返回数字的字符串格式,该字符串为指定长度。
     */
    public static final String padl(final Number num, final int size) {
        return padl(num.toString(), size, '0');
    }

    /**
     * 字符串左补齐。如果原始字符串s长度大于size,则只保留最后size个字符。
     *
     * @param s    原始字符串
     * @param size 字符串指定长度
     * @param c    用于补齐的字符
     * @return 返回指定长度的字符串,由原字符串左补齐或截取得到。
     */
    public static final String padl(final String s, final int size, final char c) {
        final StringBuilder sb = new StringBuilder(size);
        if (s != null) {
            final int len = s.length();
            if (s.length() <= size) {
                for (int i = size - len; i > 0; i--) {
                    sb.append(c);
                }
                sb.append(s);
            } else {
                return s.substring(len - size, len);
            }
        } else {
            for (int i = size; i > 0; i--) {
                sb.append(c);
            }
        }
        return sb.toString();
    }
}
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CommonController

package com.qhzx.mad.backstage.controller;

import com.qhzx.mad.backstage.configss.FileUploadUtils;
import com.qhzx.mad.backstage.configss.FileUtils;
import com.qhzx.mad.backstage.configss.ProjectConfig;
import com.qhzx.mad.backstage.configss.Result;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import org.apache.tomcat.util.buf.StringUtils;
import java.util.*;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */

@Api(tags = "上传api")
@RestController
@CrossOrigin
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);


    /**
     * 通用上传请求(单个)
     */
    @ApiOperation("通用上传请求")
    @PostMapping("/upload")
    public Result uploadFile(MultipartFile file) {
        try {
            // 上传文件路径
            String filePath = ProjectConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            Map<String, Object> ajax = new HashMap<>();
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return Result.succeed(ajax);
        } catch (Exception e) {
            e.printStackTrace();
            return Result.fail(e.getMessage());
        }
    }
    private static final char FILE_DELIMETER = ',';
    /**
     * 通用上传请求(多个)
     */
    @PostMapping("/uploads")
    public Result<Map<String, Object>> uploadFiles(List<MultipartFile> files) {
        try {
            // 上传文件路径
            String filePath = ProjectConfig.getUploadPath();
            List<String> fileNames = new ArrayList<>();
            List<String> newFileNames = new ArrayList<>();
            List<String> originalFilenames = new ArrayList<>();
            for (MultipartFile file : files) {
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                fileNames.add(fileName);
                newFileNames.add(FileUtils.getName(fileName));
                originalFilenames.add(file.getOriginalFilename());
            }
            Map<String, Object> ajax = new HashMap<>();
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return Result.succeed(ajax);
        } catch (Exception e) {
            return Result.fail(e.getMessage());
        }
    }
}

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