Springboot - 文件上传、工具、异常处理

@PostMapping("upload")
@ResponseBody
public Result upload(@RequestParam MultipartFile file) throws BizException{
    //文件名
    final String filename = file.getOriginalFilename();
    //保存
    try {
        file.transferTo(new File("本地或者网络路径",filename));
    } catch (IOException e) {
        throw new BizException("文件上传失败",e);
    }
    //C:/Users/yht11/Desktop/upload ==>127.0.0.1/head 目录地址映射
    return Result.success("文件上传成功", "/head/" + filename);

}  

public class CodeUtil {
    public static void main(String[] args){
        FastAutoGenerator.create("jdbc:mysql:///vote", "root", "**")
                .globalConfig(builder -> {
                    builder.author("hawcat") // 设置作者
                            //.enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir("路径"); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("cn.hawcat") // 设置父包名
                            .moduleName("模块名") // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, "路径")); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder//.addInclude("t_simple") // 设置需要生成的表名
                            .addTablePrefix("tp_"); // 设置过滤表前缀
                })
                //.templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();


    }

public class Utils {

    //判断空对象，空字符串，空集合方法
    public  static boolean isEmpty(Object obj){
        if(obj == null){
            return true;

        }else if(obj instanceof String){
            String s = (String) obj;
            return s.trim().isEmpty();

        }else if(obj instanceof Collection){
            Collection c = (Collection) obj;
            return c.isEmpty();

        }else if(obj instanceof Map){
            Map c = (Map) obj;
            return c.isEmpty();
        }
        return false;
    }

    //用户检查bool值是否为true,如果是true则抛出异常
    public static void check(boolean bool,String msg) throws BizException{
        if(bool){
            throw new BizException(msg);
        }
    }

    //判断obj是否为空，如果是空 则抛出异常
    public static void checkEmpty(Object obj,String msg) throws  BizException{
        check(isEmpty(obj),msg);
    }
}

//自定义业务异常
public class BizException extends Exception{
    public BizException() {
    }

    public BizException(String message) {
        super(message);
    }

    public BizException(String message, Throwable cause) {
        super(message, cause);
    }

    public BizException(Throwable cause) {
        super(cause);
    }

    public BizException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}