做读者档案、联系方式、借阅资格功能

src/main/java/com/mzh/library/entity/ReaderStatus.java

@@ -0,0 +1,40 @@
+package com.mzh.library.entity;
+
+import java.util.Locale;
+
+public enum ReaderStatus {
+    ACTIVE("active", "Active"),
+    SUSPENDED("suspended", "Suspended"),
+    INACTIVE("inactive", "Inactive");
+
+    private final String code;
+    private final String displayName;
+
+    ReaderStatus(String code, String displayName) {
+        this.code = code;
+        this.displayName = displayName;
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public static ReaderStatus fromCode(String code) {
+        if (code == null || code.trim().isEmpty()) {
+            throw new IllegalArgumentException("Reader status is required");
+        }
+
+        String normalized = code.trim().toLowerCase(Locale.ROOT);
+        for (ReaderStatus status : values()) {
+            if (status.code.equals(normalized)) {
+                return status;
+            }
+        }
+
+        throw new IllegalArgumentException("Unsupported reader status: " + code);
+    }
+}