Initial project

src/main/java/com/imyeyu/fx/ui/components/XTreeView.java

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+package com.imyeyu.fx.ui.components;
+
+import com.imyeyu.fx.utils.SmoothScroll;
+import javafx.collections.ObservableList;
+import javafx.scene.control.TreeItem;
+import javafx.scene.control.TreeView;
+
+/**
+ * 不显示根节点的树形结构，实现多个根节点
+ *
+ * @author 夜雨
+ * @since 2021-04-26 01:34
+ */
+public class XTreeView<T> extends TreeView<T> {
+
+	private final TreeItem<T> dummyRoot = new TreeItem<>();
+
+	/** 默认构造 */
+	public XTreeView() {
+		dummyRoot.setExpanded(true);
+		setRoot(dummyRoot);
+		setShowRoot(false);
+		// 平滑滚动
+		SmoothScroll.virtual(this);
+	}
+
+	/**
+	 * 设置根节点
+	 *
+	 * @param roots 根节点
+	 */
+	@SafeVarargs
+	public final void setRoots(TreeItem<T>... roots) {
+		dummyRoot.getChildren().addAll(roots);
+	}
+
+	/**
+	 * 获取根节点列表
+	 *
+	 * @return 根节点列表
+	 */
+	public ObservableList<TreeItem<T>> getRoots() {
+		return dummyRoot.getChildren();
+	}
+}