如何获取@Attribute 名称？

Question

我已将此注释为 java class 并希望从 @Attribute(name = "HSS-EsmApnId") 获取名称，然后从以下字符串中获取值以制作地图。

import java.util.List;

import javax.naming.Name;

import org.springframework.ldap.odm.annotations.Attribute;
import org.springframework.ldap.odm.annotations.Entry;
import org.springframework.ldap.odm.annotations.Id;

@Entry(objectClasses = {"HSS-EsmApn"}, base = "nodeName=jambala")
public final class Apn {

    @Id
    private Name dn;

    @Attribute(name = "HSS-EsmApnId") // this name would be the key
    private String apnId; // and apnId would be the value

    @Attribute(name = "HSS-EsmApnName")
    private String apnName;

    @Attribute(name = "groupId")
    private String groupId;

    @Attribute(name = "objectClass")
    private List<String> objectClass;

    @Attribute(name = "ownerId")
    private String ownerId;

    @Attribute(name = "permissions")
    private String permissions;

    @Attribute(name = "shareTree")
    private String shareTree;

    @Override
    public String toString() {
        return "Apn [dn=" + dn + ", apnId=" + apnId + ", apnName=" + apnName + ", groupId=" + groupId + ", objectClass="
            + objectClass + ", ownerId=" + ownerId + ", permissions=" + permissions + ", shareTree=" + shareTree
            + "]";
    }
}

我尝试使用注释，但我只能获得 @Entry 注释值。

    Class<?> clazz = Apn.class;
    System.out.println(clazz);

    java.lang.annotation.Annotation[] annotations = clazz.getAnnotations();
    for (Annotation annotation : annotations) {
        System.out.println(annotation.annotationType());
    }

非常感谢任何帮助。

Answer 1

您要求 class 级注释。你想要做的是获取 field 级注释：

Field field = Apn.class.getDeclaredField("apnId");
Annotation[] annotations = field.getAnnotations();

另外，如果你想得到具体的annotation，你可以使用field.getAnnotationsByType(Entry.class)，这样你就可以访问到具体的class的annotation及其参数，比如name，视情况而定。

如何获取@Attribute 名称？

How to get @Attribute name?

java

spring-annotations