hac1

src/Main.java

@@ -247,7 +247,7 @@ public class Main extends Application {
         contentArea.setCenter(goodsManagementView);
     }
     private void showCategoryManagementView() {
-        CategoryManagementView categoryManagementView = new CategoryManagementView();
+        CategoryManagementView categoryManagementView = new CategoryManagementView(contentArea);
         contentArea.setCenter(categoryManagementView);
     }
     private void showOperationLogView() {

src/model/DataManager.java

@@ -186,4 +186,11 @@ public class DataManager {
             })
             .collect(Collectors.toList());
     }
+
+    public List<String> getAllCategories() {
+        return goodsMap.values().stream()
+                .map(Goods::getCategory)
+                .distinct()
+                .collect(Collectors.toList());
+    }
 }

src/view/CategoryManagementView.java

@@ -2,55 +2,154 @@ package view;
 
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
+import javafx.event.EventHandler;
+import javafx.geometry.Insets;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeView;
+import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.AnchorPane;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.VBox;
 import model.DataManager;
 import model.Goods;
 
+import java.util.HashMap;
+import java.util.Map;
+
 public class CategoryManagementView extends AnchorPane {
 
     private TreeView<String> categoryTreeView;
+    private BorderPane contentArea;
+    private Map<String, Goods> goodsMap; // 用于快速查找商品
 
-    public CategoryManagementView() {
+    public CategoryManagementView(BorderPane contentArea) {
+        this.contentArea = contentArea;
         initializeComponents();
         loadCategoriesAndGoods();
     }
 
     private void initializeComponents() {
         categoryTreeView = new TreeView<>();
-        categoryTreeView.setShowRoot(false); // 不显示根节点
-        AnchorPane.setTopAnchor(categoryTreeView, 10.0);
-        AnchorPane.setRightAnchor(categoryTreeView, 10.0);
-        AnchorPane.setBottomAnchor(categoryTreeView, 10.0);
-        AnchorPane.setLeftAnchor(categoryTreeView, 10.0);
+        categoryTreeView.setShowRoot(false); // 隐藏根节点
+        AnchorPane.setTopAnchor(categoryTreeView, 0.0);
+        AnchorPane.setBottomAnchor(categoryTreeView, 0.0);
+        AnchorPane.setLeftAnchor(categoryTreeView, 0.0);
+        AnchorPane.setRightAnchor(categoryTreeView, 0.0);
         this.getChildren().add(categoryTreeView);
     }
 
     private void loadCategoriesAndGoods() {
         DataManager dataManager = DataManager.getInstance();
         ObservableList<Goods> allGoods = FXCollections.observableArrayList(dataManager.getAllGoods());
+        ObservableList<String> categories = FXCollections.observableArrayList(dataManager.getAllCategories());
 
-        // 获取所有分类
-        ObservableList<String> categories = FXCollections.observableArrayList(allGoods.stream()
-                .map(Goods::getCategory)
-                .distinct()
-                .toArray(String[]::new));
+        // 对商品按照价格进行排序
+        allGoods.sort((g1, g2) -> Double.compare(g1.getPrice(), g2.getPrice()));
 
         // 构建树结构
-        TreeItem<String> root = new TreeItem<>();
-        for (String category : categories) {
-            TreeItem<String> categoryItem = new TreeItem<>(category);
-            for (Goods goods : allGoods) {
-                if (goods.getCategory().equals(category)) {
-                    TreeItem<String> goodsItem = new TreeItem<>(goods.getName() + " (" + goods.getSpecification() + ")");
-                    categoryItem.getChildren().add(goodsItem);
+        TreeItem<String> root = new TreeItem<>("Root"); // 设置根节点
+
+        // 使用嵌套的 Map 结构来存储类别和价格区间
+        Map<String, Map<String, TreeItem<String>>> categoryPriceRangeItems = new HashMap<>();
+        goodsMap = new HashMap<>(); // 初始化商品映射
+
+        for (Goods goods : allGoods) {
+            String category = goods.getCategory();
+            int price = (int) goods.getPrice();
+            int rangeStart = (price / 1000) * 1000;
+            String priceRange = rangeStart + "-" + (rangeStart + 999);
+
+            // 获取或创建类别分类
+            Map<String, TreeItem<String>> priceRangeItems = categoryPriceRangeItems.get(category);
+            if (priceRangeItems == null) {
+                priceRangeItems = new HashMap<>();
+                categoryPriceRangeItems.put(category, priceRangeItems);
+
+                // 创建类别节点并添加到根节点
+                TreeItem<String> categoryItem = new TreeItem<>(category);
+                root.getChildren().add(categoryItem);
+            }
+
+            // 获取或创建价格区间分类
+            TreeItem<String> priceRangeItem = priceRangeItems.get(priceRange);
+            if (priceRangeItem == null) {
+                priceRangeItem = new TreeItem<>(priceRange);
+                priceRangeItems.put(priceRange, priceRangeItem);
+
+                // 获取类别节点并添加价格区间节点
+                TreeItem<String> categoryItem = root.getChildren().stream()
+                        .filter(item -> item.getValue().equals(category))
+                        .findFirst()
+                        .orElse(null);
+                if (categoryItem != null) {
+                    categoryItem.getChildren().add(priceRangeItem);
                 }
             }
-            root.getChildren().add(categoryItem);
+
+            // 获取库存和价格
+            int stock = dataManager.getStock(goods.getId());
+            // 构建显示文本
+            String displayText = goods.getName() + " (" + goods.getSpecification() + ") - 库存: " + stock + " - 价格: " + price;
+            TreeItem<String> goodsItem = new TreeItem<>(displayText);
+            priceRangeItem.getChildren().add(goodsItem);
+
+            // 将商品存储到映射中以便快速查找
+            goodsMap.put(displayText, goods);
         }
 
         categoryTreeView.setRoot(root);
+
+        // 展开所有一级节点（类别）
+        for (TreeItem<String> categoryItem : root.getChildren()) {
+            categoryItem.setExpanded(true);
+        }
+
+        // 为 TreeView 添加鼠标点击事件监听器
+        categoryTreeView.setOnMouseClicked(new EventHandler<MouseEvent>() {
+            @Override
+            public void handle(MouseEvent event) {
+                if (event.getClickCount() == 2) { // 双击事件
+                    TreeItem<String> selectedItem = categoryTreeView.getSelectionModel().getSelectedItem();
+                    if (selectedItem != null && !selectedItem.isLeaf()) {
+                        // 如果点击的是分类或价格区间，不显示详细信息
+                        return;
+                    }
+                    if (selectedItem != null) {
+                        Goods selectedGoods = goodsMap.get(selectedItem.getValue());
+                        if (selectedGoods != null) {
+                            showGoodsDetails(selectedGoods);
+                        }
+                    }
+                }
+            }
+        });
     }
 
+    private void showGoodsDetails(Goods goods) {
+        // 创建一个 VBox 来显示商品详细信息
+        VBox detailsBox = new VBox(10);
+        detailsBox.setPadding(new Insets(10));
+
+        Label nameLabel = new Label("名称: " + goods.getName());
+        Label specificationLabel = new Label("规格: " + goods.getSpecification());
+        Label categoryLabel = new Label("类别: " + goods.getCategory());
+        Label priceLabel = new Label("价格: " + goods.getPrice());
+        Label stockLabel = new Label("库存: " + DataManager.getInstance().getStock(goods.getId()));
+
+        detailsBox.getChildren().addAll(nameLabel, specificationLabel, categoryLabel, priceLabel, stockLabel);
+
+        // 添加返回按钮
+        Button backButton = new Button("返回");
+        backButton.setOnAction(event -> {
+            // 清空 contentArea 并重新加载分类视图
+            contentArea.setCenter(categoryTreeView); // 重新显示分类视图
+        });
+
+        detailsBox.getChildren().add(backButton); // 将返回按钮添加到最后
+
+        // 将详细信息显示在 contentArea 中
+        contentArea.setCenter(detailsBox);
+    }
 }

uml.iml

@@ -7,7 +7,17 @@
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="libs" level="project" />
-    <orderEntry type="library" name="junit-4.12" level="project" />
+    <orderEntry type="library" exported="" name="libs" level="project" />
+    <orderEntry type="library" exported="" name="junit-4.12" level="project" />
+    <orderEntry type="module-library" exported="">
+      <library name="JUnit4">
+        <CLASSES>
+          <root url="jar://$MODULE_DIR$/lib/junit-4.13.1.jar!/" />
+          <root url="jar://$MODULE_DIR$/lib/hamcrest-core-1.3.jar!/" />
+        </CLASSES>
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
   </component>
 </module>