java自定义注解

定义

@Target({ElementType.TYPE, ElementType.METHOD,ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
public @interface NewSOFieldLength {

     String value();
}

@NewSOFieldName("enablestate")
    private String enablestate;

Field[] fields = t.getClass().getFields();
         
                if (fields.length > 0) {
                    for (Field field : fields
                    ) {
                        NewSOFieldName annoName = field.getAnnotation(NewSOFieldName.class);
                        field.setAccessible(true);
//属性值
                        String fieldVal = field.get(t) == null ? null : field.get(t).toString();
//NewSOFieldName 注解的value值
                        String name = annoName.value();
                       
                    }
                }