Java实现Windows的dir命令
时间:2011-07-06 熔 岩
为做一个文件管理系统所实现的一个很粗糙的小例子，感觉还是有研究价值的。下面是源代码：
import java.util.Comparator;
import java.io.File;
/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-7-18 22:43:44<br>
* <b>Note</b>: 文件排序，按照先目录后文件方式排
*/
public class FileComparator implements Comparator<File> {
public int compare(File o1, File o2) {
if (o1.isDirectory() && o2.isDirectory()) return o1.compareTo(o2);
else if(o1.isDirectory() && !o2.isDirectory()) return -1;
else if(!o1.isDirectory() && o2.isDirectory()) return 1;
else return o1.compareTo(o2);
}
}
import java.io.File;
import java.util.*;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.NumberFormat;
/**
* Created by IntelliJ IDEA.<br>
* <b>User</b>: leizhimin<br>
* <b>Date</b>: 2008-7-18 22:02:30<br>
* <b>Note</b>: 模拟dir测试的例程
*/
public class TestFile {
public static DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm");
int nl = 18;
public static void main(String args[]) {
test();
}
public static void test() {
System.out.println("----------test()----------");
File file = new File("F:\\SOFT_DEV");
// file.isDirectory();
// System.out.println(File.pathSeparator);
// System.out.println(File.pathSeparatorChar);
// System.out.println(File.separator);
// System.out.println(File.separatorChar);
FileComparator fc = new FileComparator();
File[] lf = file.listFiles();
Arrays.sort(lf, fc); //数组排序
for (File f : lf) {
String dataStr = df.format(new Date(f.lastModified()));
if (f.isDirectory()) {
System.out.print(dataStr + " <DIR> ");
} else {
System.out.print(dataStr + " " + getFormatString(String.valueOf(NumberFormat.getInstance().format(f.length()))));
}
System.out.println(" " + f.getName());
}
}
//格式化函数
public static String getFormatString(String s) {
int nb = 12 - s.length();
StringBuilder sb = new StringBuilder();
if (nb > 0) {
for (in
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