From c69e7e697d24dc4cd7bd792b2f44e15241df1dff Mon Sep 17 00:00:00 2001
From: pm4c6ia2v <3079754565@qq.com>
Date: Sun, 26 Oct 2025 16:54:56 +0800
Subject: [PATCH] ADD file via upload

---
 CertificateManager.java | 62 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 CertificateManager.java

diff --git a/CertificateManager.java b/CertificateManager.java
new file mode 100644
index 0000000..e27f301
--- /dev/null
+++ b/CertificateManager.java
@@ -0,0 +1,62 @@
+/**
+ * 证书管理接口
+ * 体现接口隔离原则
+ * 定义证书管理的核心功能
+ */
+package com.employeetraining.certificate;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Optional;
+
+public interface CertificateManager {
+    /**
+     * 颁发证书
+     */
+    void issueCertificate(Certificate certificate);
+    
+    /**
+     * 更新证书状态
+     */
+    boolean updateCertificateStatus(String certificateId, Certificate.CertificateStatus status);
+    
+    /**
+     * 吊销证书
+     */
+    boolean revokeCertificate(String certificateId, String reason);
+    
+    /**
+     * 续期证书
+     */
+    boolean renewCertificate(String certificateId, LocalDate newExpiryDate);
+    
+    /**
+     * 根据ID查找证书
+     */
+    Optional<Certificate> findCertificateById(String certificateId);
+    
+    /**
+     * 根据员工ID查找证书
+     */
+    List<Certificate> findCertificatesByEmployeeId(String employeeId);
+    
+    /**
+     * 根据课程ID查找证书
+     */
+    List<Certificate> findCertificatesByCourseId(String courseId);
+    
+    /**
+     * 查找过期的证书
+     */
+    List<Certificate> findExpiredCertificates();
+    
+    /**
+     * 查找即将过期的证书（在指定天数内）
+     */
+    List<Certificate> findCertificatesExpiringSoon(int days);
+    
+    /**
+     * 获取所有证书
+     */
+    List<Certificate> getAllCertificates();
+}
\ No newline at end of file