jtree 程序化多选答案

【问题标题】：jtree programmatic multi selectionjtree 程序化多选
【发布时间】：2011-10-22 13:13:28
【问题描述】：

是否能够以编程方式在 JTree 中选择多个树节点？我通过tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);设置了多选模式

我所需要的只是让我的应用程序能够以编程方式选择一些节点。但我还没有找到如何做到这一点的方法。任何人都可以提供建议如何解决这个问题？

谢谢

【问题讨论】：

标签： java swing user-interface jtree

【解决方案1】：

import java.awt.Dimension;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;

public class TreeWithMultiDiscontiguousSelections {

    public static void main(String[] argv) {
        JTree tree = new JTree();
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
        int treeSelectedRows[] = {3, 1};
        tree.setSelectionRows(treeSelectedRows);
        TreeSelectionListener treeSelectionListener = new TreeSelectionListener() {

            @Override
            public void valueChanged(TreeSelectionEvent treeSelectionEvent) {
                JTree treeSource = (JTree) treeSelectionEvent.getSource();
                System.out.println("Min: " + treeSource.getMinSelectionRow());
                System.out.println("Max: " + treeSource.getMaxSelectionRow());
                System.out.println("Lead: " + treeSource.getLeadSelectionRow());
                System.out.println("Row: " + treeSource.getSelectionRows()[0]);
            }
        };
        tree.addTreeSelectionListener(treeSelectionListener);
        JFrame frame = new JFrame("JTree With Multi-Discontiguous selection");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new JScrollPane(tree));
        frame.setPreferredSize(new Dimension(380, 320));
        frame.setLocation(150, 150);
        frame.pack();
        frame.setVisible(true);
    }

    private TreeWithMultiDiscontiguousSelections() {
    }
}

【讨论】：

【解决方案2】：

见：

setSelectionPaths(TreePath[]) 和 setSelectionRows(int[]) 在JTree JavaDocs 中。
How to Use Trees 在 Java 教程中。

【讨论】：

粘贴到带箭头的世界对话框中会转义括号，并重新排序链接。

【解决方案3】：

将它用于您的 JTree

tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    tree.getSelectionModel().setSelectionMode(TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);
    tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);

【讨论】：