feat: 优化页面显示

src/main/java/com/lanyuanxiaoyao/bookstore/helper/OptimiseHelper.java

@@ -0,0 +1,54 @@
+package com.lanyuanxiaoyao.bookstore.helper;
+
+import cn.hutool.core.util.ObjectUtil;
+import cn.hutool.core.util.StrUtil;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * 优化工具
+ *
+ * @author lanyuanxiaoyao
+ * @version 20250929
+ */
+@Slf4j
+public class OptimiseHelper {
+  public static String optimize(String text) {
+    // 移除空行
+    text = StrUtil.trimToNull(text);
+    if (ObjectUtil.isNull(text)) {
+      return null;
+    }
+
+    // 英文全角字符转换为半角字符
+    text = halfWidth(text);
+
+
+    return text;
+  }
+
+  private static String halfWidth(String text) {
+    var builder = new StringBuilder();
+    for (var c : text.toCharArray()) {
+      // 检查是否为全角数字 (U+FF10 到 U+FF19)
+      if (c >= 0xFF10 && c <= 0xFF19) {
+        // 对应的半角数字是 (c - 0xFEE0)
+        builder.append((char) (c - 0xFEE0));
+      }
+      // 检查是否为全角大写字母 (U+FF21 到 U+FF3A)
+      else if (c >= 0xFF21 && c <= 0xFF3A) {
+        // 对应的半角字母是 (c - 0xFEE0)
+        builder.append((char) (c - 0xFEE0));
+      }
+      // 检查是否为全角小写字母 (U+FF41 到 U+FF5A)
+      else if (c >= 0xFF41 && c <= 0xFF5A) {
+        // 对应的半角字母是 (c - 0xFEE0)
+        builder.append((char) (c - 0xFEE0));
+      }
+      // 非全角字母和数字字符直接添加
+      else {
+        builder.append(c);
+      }
+    }
+    return builder.toString();
+  }
+}

src/main/java/com/lanyuanxiaoyao/bookstore/repository/ChapterRepository.java

@@ -8,7 +8,7 @@ import org.springframework.stereotype.Repository;
 
 @Repository
 public interface ChapterRepository extends SimpleRepository<Chapter> {
-  @Query("select max(chapter.sequence) from Chapter chapter")
+  @Query("select max(chapter.sequence) from Chapter chapter where chapter.book.id = ?1")
   Optional<Double> findMaxSequence(Long bookId);
 }