Java实现文件上传到本地方式(自定义保存路径)

public String uploadToLocal(MultipartFile file){
}

String originName = file.getOriginalFilename();

        Set<String> set = new HashSet<>();
        set.add(".pdf");
        set.add(".doc");
        set.add(".docx");
        set.add(".jpg");

        int count = 0;
        for(int i = 0; i < originName.length(); i++){
            if(originName.charAt(i) == '.'){
                count = i;
                break;
            }
        }
        String endName = originName.substring(count);

String fileType = originName.substring(count + 1);

        if(!set.contains(endName)){
            return new String("上传的文件类型错误,只能上传pdf,doc,docx,jpg类型的文件");
        }

        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        String format = sdf.format(new Date());
        String savePath = System.getProperty("user.dir") + "\\" + "files" +   "\\" + fileType + "\\" + format;

        try {
            file.transferTo(new File(folder,saveName));
            String filePath = savePath + "\\" + saveName;
            return new String("文件路径为:" + filePath);
        } catch (IOException e){
            return new String(e.getMessage());
        }

    public String uploadToLocal(MultipartFile file){
        // 获取文件原本的名字
        String originName = file.getOriginalFilename();
        // 判断文件是否是pdf文件
        Set<String> set = new HashSet<>();
        set.add(".pdf");
        set.add(".doc");
        set.add(".docx");
        // 取出文件的后缀
        int count = 0;
        for(int i = 0; i < originName.length(); i++){
            if(originName.charAt(i) == '.'){
                count = i;
                break;
            }
        }
        String endName = originName.substring(count); //取出文件类型
        String fileType = originName.substring(count + 1); //文件类型
        if(!set.contains(endName)){
            return new String("上传的文件类型错误,只能上传pdf,doc,docx类型的文件");
        }
        // 创建保存路径
        //日期格式
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        String format = sdf.format(new Date());
        String savePath = System.getProperty("user.dir") + "\\" + "files" +   "\\" + fileType + "\\" + format;
        // 保存文件的文件夹
        File folder = new File(savePath);
        // 判断路径是否存在,不存在则自动创建
        if(!folder.exists()){
            folder.mkdirs();
        }
        String saveName = originName;
        try {
            file.transferTo(new File(folder,saveName));
            String filePath = savePath + "\\" + saveName;
            return new String("文件路径为:" + filePath);
        } catch (IOException e){
            return new String(e.getMessage());
        }
    }