java - spring java方法是否通过@Value字符串文字获取字段？

Question

@Value("${properties.name:Tom}")
String name;
@Value("${properties.email}")
String email;

我想通过注释的值来归档。getField("properties.name") 返回字符串字段名称，而不是值“tom”。spring有这样的方法吗？

Answer 1

可以使用反射，因为 Value 有 RetentionPolicy RUNTIME

Field field = Stream.of(YourClass.class.getFields())
    .filter(field -> field.isAnnotationPresent(Value.class))
    .filter(field -> field.getAnnotation(Value.class).value().contains("properties.name")) // or compare to whole expression, or use startsWith, or regex... Also think about NPE check
    .findFirst()
    .orElse( /* HANDLE FIELD NOT PRESENT */);