/**
     * 上傳采購合同PDF
     *
     * @author Leo高洋
     * @create 2023-01-20 6:51
     */
    @PostMapping("/uploadContract")
    public Map<String, Object> uploadContract(MultipartFile file) throws Exception {
        Map<String, Object> resultMap = new HashMap<>();
        if (!file.isEmpty()) {
            logger.info("上傳采購合同PDF");
            String originalFilename = file.getOriginalFilename();// 獲取文件名稱
            String fileName = originalFilename.substring(0, originalFilename.indexOf("."));// 獲取前綴
            String suffixName = originalFilename.substring(originalFilename.lastIndexOf("."));// 獲取后綴
            String newFileName = fileName + "-" + DateUtil.getCurrentDatePath() + suffixName;// 根據(jù)上傳時(shí)間重新命名合同
            // 根據(jù)定義的位置存入合同
            FileUtils.copyInputStreamToFile(file.getInputStream(), new File(contractPdfFilePath + newFileName));
            resultMap.put("code", 0);
            resultMap.put("msg", "上傳成功");
            Map<String, Object> dataMap = new HashMap<>();
            dataMap.put("title", newFileName);
            resultMap.put("data", dataMap);
        }
        return resultMap;
    }

contractPdfFilePath: E://2023GraduationDesign/uploadFile/AssetPurchaseContract/

@Value("${contractPdfFilePath}")
private String contractPdfFilePath;

Map<String, Object> dataMap = new HashMap<>();
dataMap.put("title", newFileName);

package com.project.util;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 日期工具類
 */
public class DateUtil {

	/**
	 * 日期對象轉(zhuǎn)字符串
	 * @param date
	 * @param format
	 * @return
	 */
	public static String formatDate(Date date,String format){
		String result="";
		SimpleDateFormat sdf=new SimpleDateFormat(format);
		if(date!=null){
			result=sdf.format(date);
		}
		return result;
	}
	
	/**
	 * 字符串轉(zhuǎn)日期對象
	 * @param str
	 * @param format
	 * @return
	 * @throws Exception
	 */
	public static Date formatString(String str,String format) throws Exception{
		if(StringUtil.isEmpty(str)){
			return null;
		}
		SimpleDateFormat sdf=new SimpleDateFormat(format);
		return sdf.parse(str);
	}
	
	public static String getCurrentDateStr(){
		Date date=new Date();
		SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddhhmmssSSSSSSSSS");
		return sdf.format(date);
	}
	
	public static String getCurrentDatePath()throws Exception{
		Date date=new Date();
		SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");
		return sdf.format(date);
	}
	
	public static void main(String[] args) {
		try {
			System.out.println(getCurrentDateStr());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

<!-- 上傳合同 -->
        <el-form-item label="上傳合同" prop="cght">
          <el-upload
                  class="upload-demo"
                  :herders="headers"
                  :action="getServerUrl()+'asset/uploadContract'"
                  :limit="1"
                  :show-file-list="false"
                  :on-success="handleContractSuccess"
          >
            <el-row>
              <el-button type="primary">添加采購合同</el-button>
              <span style="font-size: 13px;color: #8d8d8d;margin-left: 15px">{{ fileName }}</span>
            </el-row>
          </el-upload>
        </el-form-item>

const fileName = ref("只允許上傳PDF文件")
const handleContractSuccess = (res) => {
  fileName.value = res.data.title;
  form.value.cght = res.data.title;
}