Question

所以我有一个获取所有文件和文件夹的类，并将它们作为字符串数组返回。这是输出。

/applications/HI
/applications/HI/Hey.txt
/applications/HI/Milk
/applications/HI/Milk/blah
/applications/HI/Milk/HEADIAJQ/text.txt
/applications/HI/Milk/HEADIAJQ/thisworks!!!!.txt
/applications/HI/MilkiM/TRASHINGTHINGS.txt
/applications/HI/emoji.txt
/applications/Test
/applications/Test/Tjinsg

所以从这里开始，我有点卡住了。我不知道如何从javafx将其转换为TreeView。任何帮助，将不胜感激。提前谢谢。

Answer 1

试试这个。

static void add(TreeItem<String> node, String path) {
    String[] items = path.substring(1).split("/");
    for (int i = 0; i < items.length; ++i) {
        TreeItem<String> found = null;
        for (TreeItem<String> child : node.getChildren())
            if (child.getValue().equals(items[i])) {
                found = child;
                break;
            }
        if (found == null) {
            found = new TreeItem<>(items[i]);
            node.getChildren().add(found);
        }
        node = found;
    }
}

static void print(TreeItem<String> node, String indent) {
    System.out.printf("%sTreeItem: %s%n", indent, node.getValue());
    for (TreeItem<String> child : node.getChildren())
        print(child, indent + "  ");
}

和

    String[] paths = {
        "/applications/HI",
        "/applications/HI/Hey.txt",
        "/applications/HI/Milk",
        "/applications/HI/Milk/blah",
        "/applications/HI/Milk/HEADIAJQ/text.txt",
        "/applications/HI/Milk/HEADIAJQ/thisworks!!!!.txt",
        "/applications/HI/MilkiM/TRASHINGTHINGS.txt",
        "/applications/HI/emoji.txt",
        "/applications/Test",
        "/applications/Test/Tjinsg",
    };
    TreeItem<String> root = new TreeItem<>("root");
    for (String path : paths)
        add(root, path);
    print(root, "");

结果：

TreeItem: root
  TreeItem: applications
    TreeItem: HI
      TreeItem: Hey.txt
      TreeItem: Milk
        TreeItem: blah
        TreeItem: HEADIAJQ
          TreeItem: text.txt
          TreeItem: thisworks!!!!.txt
      TreeItem: MilkiM
        TreeItem: TRASHINGTHINGS.txt
      TreeItem: emoji.txt
    TreeItem: Test
      TreeItem: Tjinsg

Answer 2

以下是您需要将folders与files分隔开来的课程：

import java.io.File;

import javafx.scene.control.TreeItem;
import javafx.scene.image.ImageView;

public class SystemFileItem extends TreeItem<String> {

    /** Stores the full path to the file or directory */
    private String fullPath;
    private boolean isDirectory;

    /**
     * Constructor
     * 
     * @param path
     */
    public SystemFileItem(String path) {
        super(path);
        this.fullPath = path;

        // test if this is a directory and set the icon
        if (new File(fullPath).isDirectory()) {
            isDirectory = true;
            //setGraphic(new ImageView(SystemFilesTree.folderImage));

        } // if you want different icons for different file types this is
            // where you'd do it
        else {
            isDirectory = false;
            //setGraphic(new ImageView(SystemFilesTree.fileImage));
        }

        // set the value
        if (!fullPath.endsWith(File.separator)) {
            // set the value (which is what is displayed in the tree)
            String value = path;
            int indexOf = value.lastIndexOf(File.separator);
            if (indexOf > 0) {
                this.setValue(value.substring(indexOf + 1));
            } else {
                this.setValue(value);
            }
        }
    }

    public String getFullPath() {
        return fullPath;
    }

    public boolean isDirectory() {
        return isDirectory;
    }
}

另一个是相当多的代码逻辑（构建一个将文件添加到根等的方法）：

    SystemFileItem root = new SystemFileItem("Root File");
    TreeView<String> treeView= new TreeView<String>(root);
    libraryTreeView.setEditable(true);
    SystemFileItem treeNode = new SystemFileItem("file path");
   ......

将数组转换为TreeView：JavaFX8

2 个答案: