From 10977553407b184c113cd219e92f540af0ffd7e1 Mon Sep 17 00:00:00 2001
From: pc9pizjb6 <122855890@qq.com>
Date: Sat, 1 Nov 2025 22:53:24 +0800
Subject: [PATCH] ADD file via upload

---
 DuplicateStudentException.java | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 DuplicateStudentException.java

diff --git a/DuplicateStudentException.java b/DuplicateStudentException.java
new file mode 100644
index 0000000..7961a23
--- /dev/null
+++ b/DuplicateStudentException.java
@@ -0,0 +1,23 @@
+package com.studentmanagement.exception;
+
+/**
+ * 重复学生异常，当尝试添加ID已存在的学生时抛出
+ */
+public class DuplicateStudentException extends Exception {
+    
+    /**
+     * 构造函数
+     * @param message 异常信息
+     */
+    public DuplicateStudentException(String message) {
+        super(message);
+    }
+    
+    /**
+     * 构造函数，带学生ID
+     * @param id 学生ID
+     */
+    public DuplicateStudentException(int id) {
+        super("学生ID " + id + " 已存在");
+    }
+}
\ No newline at end of file