递归方法不适用于 FileWriter
Recursive method doesn't work with FileWriter
我有一个方法应该在文件中以树视图的形式写下给定目录的结构。但它不会记下子文件夹及其文件,所以我尝试添加一个递归调用,但由于某种原因它不起作用。我该如何解决?
public void readFiles() {
File baseDirectory = new File(path);
if (baseDirectory.isDirectory()) {
try (FileWriter writer = new FileWriter("D:/info.txt")) {
for (File file : baseDirectory.listFiles()) {
if (file.isFile()) {
writer.append(" |------ " + file.getName());
writer.append("\n");
} else if (file.isDirectory()) {
writer.append(" |+++++ " + file.getName());
writer.append("\n");
path = file.getPath().replace("\", "/");
readFiles(); // recursive call here
}
}
writer.flush();
} catch (IOException ex) {
ex.printStackTrace();
}
}
主要 class :
public class Runner {
public static void main(String[] args) {
TreeViewer treeViewer = new TreeViewer();
treeViewer.setPath("D:/test");
treeViewer.readFiles();
}
}
[输出文件示例:][1]
试试这个。
static void tree(File file, String indent, Writer out) throws IOException {
out.write(indent + file.getName() + System.lineSeparator());
if (file.isDirectory())
for (File child : file.listFiles())
tree(child, indent + " ", out);
}
public static void main(String[] args) throws IOException {
try (Writer out = new FileWriter("D:/info.txt")) {
tree(new File("D:/test"), "", out);
}
}
我有一个方法应该在文件中以树视图的形式写下给定目录的结构。但它不会记下子文件夹及其文件,所以我尝试添加一个递归调用,但由于某种原因它不起作用。我该如何解决?
public void readFiles() {
File baseDirectory = new File(path);
if (baseDirectory.isDirectory()) {
try (FileWriter writer = new FileWriter("D:/info.txt")) {
for (File file : baseDirectory.listFiles()) {
if (file.isFile()) {
writer.append(" |------ " + file.getName());
writer.append("\n");
} else if (file.isDirectory()) {
writer.append(" |+++++ " + file.getName());
writer.append("\n");
path = file.getPath().replace("\", "/");
readFiles(); // recursive call here
}
}
writer.flush();
} catch (IOException ex) {
ex.printStackTrace();
}
}
主要 class :
public class Runner {
public static void main(String[] args) {
TreeViewer treeViewer = new TreeViewer();
treeViewer.setPath("D:/test");
treeViewer.readFiles();
}
}
[输出文件示例:][1]
试试这个。
static void tree(File file, String indent, Writer out) throws IOException {
out.write(indent + file.getName() + System.lineSeparator());
if (file.isDirectory())
for (File child : file.listFiles())
tree(child, indent + " ", out);
}
public static void main(String[] args) throws IOException {
try (Writer out = new FileWriter("D:/info.txt")) {
tree(new File("D:/test"), "", out);
}
}