♻️ 重构代码, 新增全局异常处理器, 优化类名

src/main/java/im/zhaojun/common/util/FileComparator.java

@@ -0,0 +1,47 @@
+package im.zhaojun.common.util;
+
+import im.zhaojun.common.enums.FileTypeEnum;
+import im.zhaojun.common.model.FileItem;
+
+import java.util.Comparator;
+
+/**
+ * 文件比较器
+ *
+ * - 文件夹始终比文件排序高
+ * - 默认按照名称排序
+ * - 默认排序为升序
+ * - 按名称排序不区分大小写
+ */
+public class FileComparator implements Comparator<FileItem> {
+
+    private String sortBy;
+    private String order;
+
+    public FileComparator(String sortBy, String order) {
+        this.sortBy = sortBy;
+        this.order = order;
+    }
+
+    @Override
+    public int compare(FileItem o1, FileItem o2) {
+        FileTypeEnum o1Type = o1.getType();
+        FileTypeEnum o2Type = o2.getType();
+
+        if (o1Type.equals(o2Type)) {
+            int result;
+            switch (sortBy) {
+                case "time": result = o1.getTime().compareTo(o2.getTime()); break;
+                case "size": result = o1.getSize().compareTo(o2.getSize()); break;
+                default: result = o1.getName().compareToIgnoreCase(o2.getName());
+            }
+            return "asc".equals(order) ? result : -result;
+        }
+
+        if (o1Type.equals(FileTypeEnum.FOLDER)) {
+            return -1;
+        } else {
+            return 1;
+        }
+    }
+}