Java通过反射校验对象属性值是否为空

实例类：

@Data
public class Person{

    @NotNull(message = "姓名不能为空")
    private String personName;

    @NotNull(message = "年龄不能为空")
    private Integer personAge;

    @NotNull(message = "性别不能为空")
    private String personSex;

    private String personId;

    private String personEmail;

}

校验方法：

@Slf4j
public class BaseVerify{
    protected void paramVerify(Person person) {

        try{
            //获取对象所有参数
            Field[] fields = person.getClass().getDeclaredFields();
            for (Field field : fields){
                NotNull annotation = field.getAnnotation(NotNull.class);
                if (ObjectUtil.isNotNull(annotation)){
                    //设置允许访问私有属性
                    field.setAccessible(Boolean.TRUE);
                    Object value = field.get(t);
                    //判断该参数是否为空
                    if (ObjectUtil.isEmpty(value)){
                        log.warn("缺失必选参数");
                        //抛出自定义异常
                        throw new PersonException("参数不能为空");
                    }
                }
            } catch(IllegalAccessException e){
                log.warn("解析数据异常",e);
            }
        }

    }

    Person person = new Person();
    person.setPersonName("xiaoming");
    person.setPersonAge(18);
    person.setPersonId("1234567");
    paramVerify(person);
}