我有一个显示给定文件夹结构的自定义Jtree。我的问题是,它以某种方式复制文件夹。JTree在显示时复制文件夹
例如给定的文件夹是C:\实施例
在该例子中夹有3文件夹中称为A,B,C
的JTree的假定,以查看它是这样的:
C: \实施例
->A
some1.txt
->B
->C
但它重复文件夹,以便它显示:
C:\实例
->A
->A
some1.txt
->B
->B
->C
->C
我使用自定义渲染器只显示名称未在JTree的完整路径, 那就是:
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {
System.out.println(value);
super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf, row, hasFocus);
if (value instanceof DefaultMutableTreeNode) {
value = ((DefaultMutableTreeNode)value).getUserObject();
if (value instanceof File) {
File file = (File) value;
if (file.isFile()) {
setText(file.getName());
} else {
setText(file.getName());
}
}
}
return this;
}
这里是我用数据填充JTree的:
/**
* Add nodes from under "dir" into curTop. Highly recursive.
*/
DefaultMutableTreeNode addNodes(DefaultMutableTreeNode curTop, File dir) {
DefaultMutableTreeNode curDir = new DefaultMutableTreeNode(dir);
if (curTop != null) { // should only be null at root
curTop.add(curDir);
}
File[] tmp = dir.listFiles();
Vector<File> ol = new Vector<File>();
ol.addAll(Arrays.asList(tmp));
Collections.sort(ol, new Comparator<File>() {
@Override
public int compare(File o1, File o2) {
int result = o1.getName().compareTo(o2.getName());
if (o1.isDirectory() && o2.isFile()) {
result = -1;
} else if (o2.isDirectory() && o1.isFile()) {
result = 1;
}
return result;
}
});
// Pass two: for files.
for (int fnum = 0; fnum < ol.size(); fnum++) {
File file = ol.elementAt(fnum);
DefaultMutableTreeNode node = new DefaultMutableTreeNode(file);
if (file.isDirectory()) {
addNodes(node, file);
}
curDir.add(node);
}
return curDir;
}
这里是我在我的代码中使用这些:
dir = new File(System.getProperty("user.dir")+"\\Example");
tree = new JTree(addNodes(null, dir));
tree.setCellRenderer(new MyTreeCellRenderer());
1)为了更好地尽快提供帮助,发布[MCVE](http://stackoverflow.com/help/mcve)(最小完整可验证示例)。 2)查看一个工作示例的[File Browser GUI](http://codereview.stackexchange.com/q/4446/7784)。 – 2014-11-05 23:01:57