public static void printFiles(String dir, List fileList){ File root = new File(dir); if (!root.exists()) return; File elements[] = root.listFiles(); Arrays.sort( elements, new Comparator() { public int compare(final Object o1, final Object o2) { if (((File)o1).isFile() && ((File)o2).isDirectory()) return -1; else if (((File)o2).isFile() && ((File)o1).isDirectory()) return 1; else return ((File)o1).compareTo(((File)o2)); } }); for (int i = 0;i<elements.length;i++){ if (elements[i].isFile()){ fileList.add(elements[i].getPath()); } else printFiles(elements[i].getPath(), fileList); } }}
如果用java调用的话(Runtime.exec(String command) ),可以写一个bat,在bat里将tree /f 的结果重定向到d盘的1.txt.
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
public class FindFiles { public static void main(String[] args) {
List<String> fileList=new ArrayList<String>();
printFiles("C:\\", fileList);
try {
BufferedWriter out = new BufferedWriter(new FileWriter("c:\\filelist.txt"));
Iterator it=fileList.iterator();
while(it.hasNext())
out.write((String)it.next()+"\n");
out.close();
} catch (IOException ioe) { }
}
public static void printFiles(String dir, List fileList){
File root = new File(dir);
if (!root.exists()) return;
File elements[] = root.listFiles();
Arrays.sort( elements, new Comparator()
{
public int compare(final Object o1, final Object o2) {
if (((File)o1).isFile() && ((File)o2).isDirectory())
return -1;
else if (((File)o2).isFile() && ((File)o1).isDirectory())
return 1;
else
return ((File)o1).compareTo(((File)o2));
}
});
for (int i = 0;i<elements.length;i++){
if (elements[i].isFile()){
fileList.add(elements[i].getPath());
}
else
printFiles(elements[i].getPath(), fileList);
}
}}
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;public class IOTest {
public static void main(String[] args) {
File f = new File("C:");
PrintWriter pw = null;
try {
pw = new PrintWriter(new BufferedOutputStream(new FileOutputStream(
"D:\\1.txt"), 1000));
printFile(f, 0, pw);
pw.flush();
pw.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} } private static void printFile(File f, int num, PrintWriter pw) {
if (!f.isDirectory()) {
for (int i = 0; i < num; i++) {
pw.print("\t");
}
pw.println("---文件:" + f.getName());
} else {
for (int i = 0; i < num; i++) {
pw.print("\t");
}
pw.println("---文件夹:" + f.getName());
File[] fs = f.listFiles();
if (fs == null) {
return;
}
for (int i = 0; i < fs.length; i++) {
for (int j = i + 1; j < fs.length; j++) {
if (fs[j].isFile()) {
File ff = fs[i];
fs[i] = fs[j];
fs[j] = ff;
}
}
}
for (int i = 0; i < fs.length; i++) {
printFile(fs[i], num + 1, pw);
}
}
}
}
package com.hoo.utils;import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;public class OperateFileUtils { /***************************************************************************
* <b>function:</b> 在java中 路径/需要替换成\\
* @createDate 2010-6-4 上午11:18:45
* @param file 替换的文件
* @return 替换后的路径
*/
private static String getAvailablePath(File file) {
return file.getPath().replace('\\', '/');
} /***************************************************************************
* <b>function:</b> 返回某个文件夹下所有的文件
* @createDate 2010-6-4 上午11:21:07
* @param fileList 找到的文件集合
* @param path 路径
* @param fileSuffix 要找的文件后缀
*/
public static void getFiles(List<File> fileList, String path, String fileSuffix) {
File file = new File(path);
File[] files = file.listFiles();
if (files == null) {
return;
} else {
for (int i = 0; i < files.length; i++) {
// 判断是否是文件夹
if (files[i].isDirectory()) {
// 递归调用getFiles方法,得到所有的文件
getFiles(fileList, getAvailablePath(files[i]), fileSuffix);
} else if (files[i].getName().lastIndexOf(fileSuffix) != -1) {// 只处理fileSuffix后缀的文档
// copyFileAndAddPackageName(files[i]);
fileList.add(files[i]);// 添加到文件集合中
}
// System.out.println(files[i].getAbsolutePath().replace('\\',
// '/'));
}
}
} /***************************************************************************
* <b>function:</b> 把文件内容复制到指定文件中
* @createDate 2010-6-4 下午12:09:42
* @author 3hhuj 胡佳
* @param file 要操作的文件
* @param toFile 保存的文件
*/
public static void copyFile2TempFile(List<File> fileList, File toFile) {
BufferedWriter bw = null;
BufferedReader br = null;
FileWriter fileWriter = null;
FileReader fileReader = null;
try {
StringBuilder sb = new StringBuilder();
String content = "";
for (File textFile : fileList) {
System.out.println(textFile.getName());
fileReader = new FileReader(textFile);// 读取文件的内容
br = new BufferedReader(fileReader);
while ((content = br.readLine()) != null) {
System.out.println(content);
if (!content.trim().equals("")) {
sb.append(content);// .append("\r");
}
}
}
fileWriter = new FileWriter(toFile);// 向文件中写入刚才读取文件中的内容
bw = new BufferedWriter(fileWriter);
bw.write(sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
bw.close();
br.close();
fileWriter.close();
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} /***************************************************************************
* <b>function:</b> 读取单个文件
* @createDate 2010-6-4 下午01:42:33
* @param file 读取内容的文件
* @param toFile 保存后的文件
*/
public static void copyFile2TempFile(File file, File toFile) {
BufferedWriter bw = null;
BufferedReader br = null;
FileWriter fileWriter = null;
FileReader fileReader = null;
try {
StringBuilder sb = new StringBuilder();
String content = "";
fileReader = new FileReader(file);// 读取文件的内容
br = new BufferedReader(fileReader);
while ((content = br.readLine()) != null) {
System.out.println(content);
if (!content.trim().equals("")) {
sb.append(content);// .append("\r");
}
}
fileWriter = new FileWriter(toFile);// 向文件中写入刚才读取文件中的内容
bw = new BufferedWriter(fileWriter);
bw.write(sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
bw.close();
br.close();
fileWriter.close();
fileReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} public static void main(String[] args) {
List<File> fileList = new ArrayList<File>();
getFiles(fileList, "c:/txt_test", ".txt");
getFiles(fileList, "c:/txt", ".txt");
// 将读取的内容放入tempFile中
File tempFile = new File("c:\\temp.txt");
if (!tempFile.exists()) {
try {
//不存在就创建一个
tempFile = File.createTempFile("temp", ".txt", new File("c:\\"));
} catch (IOException e) {
e.printStackTrace();
}
}
//copyFile2TempFile(fileList, tempFile);
copyFile2TempFile(new File("c:\\a.txt"), tempFile);
}
}
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