自定义字段描述

@Retention(RetentionPolicy.RUNTIME)@Target(ElementType.FIELD)public @interface FieldDescrib {    String name();    String desc() default "";}@Datapublic class StudentDemo {    @FieldDescrib(name = "学生的年纪", desc = "正常情况是1-100")    private Integer age;    @FieldDescrib(name = "学生的性别", desc = "0:未知 1:男 2:女")    private Integer sex;}

获取字段自定义注解

@RequestMapping("/getAttrVals")    public void getAttrVal() {        StudentDemo StudentDemo = new StudentDemo();        StudentDemo.setAge(20);        StudentDemo.setSex(1);        Field[] fields = StudentDemo.getClass().getDeclaredFields();        String getFields = "";        for (Field field : fields) {            FieldDescrib declaredAnnotation = field.getDeclaredAnnotation(FieldDescrib.class);            System.out.println(declaredAnnotation);            getFields += "name:" + field.getName() + "=" + ModelToMap.getFieldValueByName(field.getName(), StudentDemo) + ",";        }        System.out.println(getFields.substring(0, getFields.length() - 1));    }

输出：

@com.demo.common.FieldDescrib(desc=正常情况是1-100, name=学生的年纪)

@com.demo.common.FieldDescrib(desc=0:未知 1:男 2:女, name=学生的性别)

name:age=20,name:sex=1

可以动态实现一些自定义的功能。