java编程思想 IO4源码

目录的检查及创建


package com.dirlist;

import java.io.File;

public class MakeDirectories {
/**
* 目录的检查及创建
*/
private static void usage(){
System.err.println("Usage:MakeDirectories path1 ...\n" +
"Creates each path\n" +
"Usage:MakeDirectories -d path1 ...\n" +
"Deletes each path\n" +
"Usage:MakeDirectories -r path1 path2 ...\n" +
"Rename from path1 to path2");
System.exit(1);
}
private static void fileData(File f){
System.out.println("Absolute path:"+f.getAbsolutePath()
+"\n Can read:"+f.canRead()
+"\n Can write:"+f.canWrite()
+"\n getName:"+f.getName()
+"\n getParrent:"+f.getParent()//返回此抽象路径名的父路径名的路径名字符串，如果此路径名没有指定父目录，则返回 null。
+"\n getPath:"+f.getPath()
+"\n length:"+f.length()
+"\n lastModified:"+f.lastModified());
if(f.isFile()){
System.out.println("It's a file");
}else if(f.isDirectory()){
System.out.println("It's a directory");
}
}
public static void main(String[] args) {
if(args.length<1)
usage();
if(args[0].equals("-r")){
if(args.length!=3){
usage();
}
File old=new File(args[1]);
File rname=new File(args[2]);
old.renameTo(rname);
fileData(old);
fileData(rname);
return;
}
int count=0;
boolean del=false;
if(args[0].equals("-d")){
count++;
del=true;
}
count--;
while(++count<args.length){
File f=new File(args[count]);
if(f.exists()){
System.out.println(f+" exists");
if(del){
System.out.println("deleting......");
f.delete();
}
}else{
if(!del){
f.mkdirs();
System.out.println("created "+ f);
}
}
fileData(f);

}
}

}