為做一個文件管理系統所實現的一個很粗糙的小例子，感覺還是有研究價值的。下面是源代碼：
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，按照先目錄後文件方式排
*/
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>: 模擬dir測試的例程
*/
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); //數組排序
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());
}
}
//格式化函數
public static String getFormatString(String s) {
int nb = 12 - s.length();
StringBuilder sb = new StringBuilder();
if (nb > 0) {
for (int n = 1; n <= nb; n++) {
sb = sb.append(" ");
}
}
return sb.append(s).toString();
}
}
運行效果：
----------test()----------
2008-06-20 13:01 <DIR> ACDSee v3.1 SR1 美化版 Plus
2008-06-20 13:01 <DIR> MyEclipse Enterprise Workbench 6.0.1 GA
2008-06-20 13:02 <DIR> PLSQL Developer v7.1.4 英文版
2008-06-20 13:02 <DIR> SQLyog Enterprise v6.5 英文版
2008-07-02 18:04 <DIR> staruml-5.0
2008-07-07 18:45 <DIR> Stylus Studio 2008 XML Enterprise Suite v9.1.1050g 官方中文企業版
2008-06-20 13:02 <DIR> Sybase.PowerDesigner.v12.5.0.2169
2008-06-20 13:02 <DIR> 輸入法設置工具 IME TOOL v2.5.9
2008-04-10 18:56 23,510,720 dotnetfx.exe
2006-06-15 11:22 54,666,120 idea-5.1.2.exe
2008-03-18 19:16 90,648,728 idea-7.0.3.exe
2008-04-11 16:08 428,538 IEDevToolBarSetup.rar
2006-06-18 00:00 148,480 IntJ512kg.exe
2008-01-31 11:12 54,278,424 jdk-1_5_0_14-windows-i586-p.exe
2008-05-29 19:07 184,893,774 MyEclipse_6.0.1GA_E3.3.1_Installer.exe
2008-06-24 11:33 461,013,238 MyEclipse_6.5.0GA_E3.3.2_Installer.exe
2008-05-30 08:15 4,320,768 mysql-connector-odbc-5.1.4-win32.msi
2007-02-04 11:08 541,075,612 Rational Rose Enterprise V7.0.nrg
2001-05-26 21:31 23,264 rational_perm.dat
2008-04-14 10:39 10,000,152 spket-1.6.11.jar
2008-06-27 14:45 113,784 tcpTrace081.zip
2008-05-12 15:31 28,847,842 ToadForMySQLFreeware_3.1.1.462.zip
2008-04-12 09:57 1,833,339 UltraISO 9.12 簡體中文版.rar
2008-06-11 14:39 16,672,737 Windows Live Messenger(MSN) 8.5.1302.1018_簡體去廣告搜索多開版_微軟聊天工具.rar
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