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src/main/java/com/yunhai/bschclassmanage/enums/LogLevel.java

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+package com.yunhai.bschclassmanage.enums;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+/**
+ * 审计日志级别：用于区分重要/次要/一般操作，配合保留期策略。
+ */
+@Getter
+@AllArgsConstructor
+public enum LogLevel {
+    IMPORTANT(1, "重要(删除)"),
+    SECONDARY(2, "次要(新增/编辑)"),
+    GENERAL(3, "一般(查询)");
+
+    private final int code;
+    private final String desc;
+
+    public static LogLevel fromCode(Integer code) {
+        if (code == null) return SECONDARY;
+        for (LogLevel l : values()) if (l.code == code) return l;
+        return SECONDARY;
+    }
+}