[英]Java - JTree not following Path hierarchy
I need to create a tree node that uses a HashMap to build a tree of files, the key of the HashMap is the Path and it's Value is the File Name.我需要创建一个使用 HashMap 来构建文件树的树节点,HashMap 的键是路径,它的值是文件名。 I've implemented a code that breaks down the key value to build the hierarchy:
我已经实现了一个代码,它分解了构建层次结构的键值:
public void createNode(HashMap<String, String> map) {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("SQL Scripts");
DefaultTreeModel treeModel = new DefaultTreeModel(root);
tree.setModel(treeModel);
Set<String> keys = map.keySet();
Iterator<String> it = keys.iterator();
while (it.hasNext()) {
String key = it.next();
String value = map.get(key);
String[] path = key.split("/");
DefaultMutableTreeNode parent = root;
for (int i = 0; i < path.length; i++) {
boolean found = false;
int index = 0;
Enumeration e = parent.children();
while (e.hasMoreElements()) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.nextElement();
if (node.toString().equals(path[i])) {
found = true;
break;
}
index++;
}
if (!found) {
DefaultMutableTreeNode child = new DefaultMutableTreeNode(path[i]);
treeModel.insertNodeInto(child, parent, index);
parent = child;
} else {
parent = (DefaultMutableTreeNode) treeModel.getChild(parent, index);
}
}
DefaultMutableTreeNode child = new DefaultMutableTreeNode(value);
treeModel.insertNodeInto(child, parent, parent.getChildCount());
}
}
But for some reason that I can't indentify, it is not working.但是由于某种我无法识别的原因,它不起作用。 I still get the following result:
我仍然得到以下结果:
Could anyone tell me what I did wrong on my code implementation?谁能告诉我我在代码实现上做错了什么?
The problem seems to be that you're trying to split a Windows file path using /
, except, Windows file paths are separated by \
, which of course is also an escape character of regular expressions 😓问题似乎是您试图使用
/
拆分 Windows 文件路径,除了 Windows 文件路径由\
分隔,这当然也是正则表达式的转义字符😓
Use key.replace(File.separatorChar, '/').split("/")
to change the \
to /
and the split on it使用
key.replace(File.separatorChar, '/').split("/")
将\
更改为/
并对其进行拆分
File file = new File(key);
Path path = file.toPath();
// Path path = Paths.get(key);
for (int index = 0; index < path.getNameCount(); index++) {
String subPath = path.getName(index));
//...
}
File file = new File(key);
Path path = file.toPath();
// Path path = Paths.get(key);
Iterator<Path> it = path.iterator();
while (it.hasNext()) {
Path next = it.next();
String subPath = path.getFileName();
//...
}
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