库存查询类：添加了通过操作员查询库存，添加了通过供应商查询库存

src/view/InventoryView.java

@@ -13,6 +13,8 @@ import model.InventoryManager;
 import java.sql.*;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
 
 public class InventoryView extends BorderPane {
     private TextField goodsField;
@@ -88,15 +90,33 @@ public class InventoryView extends BorderPane {
         goodsField = new TextField();
         goodsField.setPromptText("请输入货物名称");
 
-        basicInfo.addRow(0, goodsLabel, goodsField);
+        // 第一行：操作员
+        Label operatorLabel = new Label("操作员：");
+        TextField operatorField = new TextField();
+        operatorField.setPromptText("请输入操作员");
+
+        // 第一行：供应商
+        Label supplierLabel = new Label("供应商：");
+        TextField supplierField = new TextField();
+        supplierField.setPromptText("请输入供应商");
+
+        basicInfo.addRow(0, goodsLabel, goodsField, operatorLabel, operatorField, supplierLabel, supplierField);
 
         // 设置列宽
         ColumnConstraints column1 = new ColumnConstraints();
         column1.setMinWidth(80);
         ColumnConstraints column2 = new ColumnConstraints();
         column2.setMinWidth(200);
+        ColumnConstraints column3 = new ColumnConstraints();
+        column3.setMinWidth(80);
+        ColumnConstraints column4 = new ColumnConstraints();
+        column4.setMinWidth(200);
+        ColumnConstraints column5 = new ColumnConstraints();
+        column5.setMinWidth(80);
+        ColumnConstraints column6 = new ColumnConstraints();
+        column6.setMinWidth(200);
 
-        basicInfo.getColumnConstraints().addAll(column1, column2);
+        basicInfo.getColumnConstraints().addAll(column1, column2, column3, column4, column5, column6);
 
         // 操作按钮
         HBox buttonBox = new HBox(10);
@@ -104,7 +124,7 @@ public class InventoryView extends BorderPane {
         buttonBox.setPadding(new Insets(10, 0, 0, 0));
 
         Button queryButton = new Button("查询库存");
-        queryButton.setOnAction(e -> handleQuery());
+        queryButton.setOnAction(e -> handleQuery(operatorField.getText(), supplierField.getText()));
 
         buttonBox.getChildren().add(queryButton);
 
@@ -112,10 +132,11 @@ public class InventoryView extends BorderPane {
         return topArea;
     }
 
-    private void handleQuery() {
+    private void handleQuery(String operator, String supplier) {
         String goodsName = goodsField.getText().trim();
-        if (goodsName.isEmpty()) {
-            showAlert("错误", "请输入货物名称！");
+
+        if (goodsName.isEmpty() && operator.isEmpty() && supplier.isEmpty()) {
+            showAlert("错误", "请输入至少一个查询条件！");
             return;
         }
 
@@ -123,34 +144,51 @@ public class InventoryView extends BorderPane {
             try {
                 String url = "jdbc:sqlite:db/dbuml.db3";
                 try (Connection conn = DriverManager.getConnection(url)) {
-                    // 修改SQL查询语句，使用LIKE实现模糊查询
-                    String sql = "SELECT * FROM warehouse WHERE goods_id LIKE ?";
+                    StringBuilder sqlBuilder = new StringBuilder("SELECT * FROM warehouse WHERE 1=1");
+                    List<Object> params = new ArrayList<>();
+
+                    if (!goodsName.isEmpty()) {
+                        sqlBuilder.append(" AND goods_id LIKE ?");
+                        params.add("%" + goodsName + "%");
+                    }
+                    if (!operator.isEmpty()) {
+                        sqlBuilder.append(" AND operator LIKE ?");
+                        params.add("%" + operator + "%");
+                    }
+                    if (!supplier.isEmpty()) {
+                        sqlBuilder.append(" AND supplier LIKE ?");
+                        params.add("%" + supplier + "%");
+                    }
+
+                    String sql = sqlBuilder.toString();
                     try (PreparedStatement stmt = conn.prepareStatement(sql)) {
-                        // 在搜索词前后添加%实现模糊匹配
-                        stmt.setString(1, "%" + goodsName + "%");
+                        for (int i = 0; i < params.size(); i++) {
+                            stmt.setString(i + 1, (String) params.get(i));
+                        }
                         ResultSet rs = stmt.executeQuery();
 
                         // 获取当前表格中的数据
                         ObservableList<InventoryManager> existingData = tableView.getItems();
                         // 清空现有数据
+                        existingData.clear();
 
                         boolean found = false;
                         while (rs.next()) {
                             String id = rs.getString("id");
                             String goodsId = rs.getString("goods_id");
                             int quantity = rs.getInt("quantity");
-                            String supplier = rs.getString("supplier");
-                            String operator = rs.getString("operator");
+                            String supplierRs = rs.getString("supplier");
+                            String operatorRs = rs.getString("operator");
                             String remark = rs.getString("remark");
 
                             InventoryManager record = new InventoryManager(
                                     id,
                                     goodsId,
                                     quantity,
-                                    supplier,
+                                    supplierRs,
                                     null, // 入库时间为 null
                                     null, // 出库时间为 null
-                                    operator,
+                                    operatorRs,
                                     remark,
                                     null // 客户为 null
                             );