java命令行文件管理器

package P1_CommandLineFileManager_20115314; import java.io.*; import java.util.ArrayList; import java.util.Map; import java.util.TreeMap; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; public class CommandLineFileManager { private static final Exception Exception = null; private File aFile; private String strCommand; private BufferedReader aBR=new BufferedReader(new InputStreamReader(System.in)); private long cutsize=1024; private void acceptCommand(File pFile) { aFile=pFile; System.out.print(aFile.getAbsolutePath()+":"); try{ String temp=aBR.readLine(); strCommand=temp.trim(); } catch(IOException e) { System.out.println("Read command fail"); } carryoutCommand(strCommand); } private void carryoutCommand(String strCommand) { if(strCommand.equals("-create")) { command_create(); return; } if(strCommand.equals("-delete")) { command_delete(); return ; } if(strCommand.equals("-enter")) { command_enter(); return ; } if(strCommand.equals("-list")) { command_list(); return ; } if(strCommand.equals("-rename")) { command_rename(); return ; } if(strCommand.equals("-copy")) { command_copy(); return ; } if(strCommand.equals("-encrypt")) { command_encrypt(); return ; } if(strCommand.equals("-decrypt")) { command_decrypt(); return ; } if(strCommand.equals("-compress")) { command_compress(); return ; } if(strCommand.equals("-uncompress")) { command_uncompress(); return ; } if(strCommand.equals("-cut")) { command_cut(); return ; } if(strCommand.equals("-merge")) { command_merge(); return ; } if(strCommand.equals("-exit")) { return ; } wrong_command(strCommand); } private void wrong_command(String strCommand) { System.out.println(strCommand+" is not correct command"); acceptCommand(aFile); } private void command_create() //只能创建目录 { System.out.print("Enter the directory name:"); String filename; try{ filename=new String(aBR.readLine()); for(int i=0;i<filename.length();i++) { char temp=(char) filename.indexOf(i); if(!((temp>='a'&&temp<='z')||(temp>='A'||temp<='Z'))) throw Exception; } filename=aFile.getAbsolutePath()+"\\"+filename; File pFile=new File(filename); if(pFile.exists()) throw Exception; pFile.mkdir(); System.out.println("Create success"); } catch(Exception e) { System.out.println("Create directory fall"); } acceptCommand(aFile); } private void command_delete() //即能删除目录，也能删除文件，此处的file是java意义下的File { try{ System.out.print("Enter the file name:"); String filename; filename=new String(aBR.readLine()); filename=aFile.getAbsolutePath()+"\\"+filename; File pFile=new File(filename); if(pFile.exists()) { delete(filename); } else { throw Exception; } System.out.println("Delete success"); } catch(Exception e) { System.out.println("Delete fall"); } acceptCommand(aFile); } private void delete(String filename) throws Exception { File pFile=new File(filename); if(pFile.isFile()) { pFile.delete(); } else { String[] subfilenames=pFile.list(); for(int i=0;i<subfilenames.length;i++) { subfilenames[i]=pFile.getAbsolutePath()+"\\"+subfilenames[i]; delete(subfilenames[i]); } pFile.delete(); } } private void command_enter() { System.out.print("Enter the directory name:"); String filename=aFile.getAbsolutePath(); try { filename=new String(aBR.readLine()); File pFile; if(filename.contains("\\")) { pFile=new File(filename); } else { pFile=new File(aFile.getAbsolutePath()+File.separator+filename); } if(pFile.exists()&&pFile.isDirectory()) { aFile=pFile; } else { throw Exception; } }catch(Exception e){ System.out.println("Enter directory fail"); } acceptCommand(aFile); } private void command_list() { String strOrder="name"; try { System.out.print("List files ordered by:"); strOrder=new String(aBR.readLine()); listFiles(strOrder); } catch(Exception e) { System.out.println("List files fail"); } acceptCommand(aFile); } private void listFiles(String strOrder) throws Exception { String[] filenames=aFile.list(); if(filenames.length==0) { System.out.println("The directory is null"); } else { if(strOrder.equals("name")) { ArrayList<String> names=new ArrayList<String>(); for(String temp:filenames) names.add(temp); System.out.println(names); } else if(strOrder.equals("size")) { File[] subfiles=aFile.listFiles(); Map<Double,String> sizes=new TreeMap<Double,String>(); Double counter=new Double(0); for(File temp:subfiles) { double size=getFileSize(temp); if(sizes.get(size)!=null) { counter+=0.000000001; //以防大小相等的文件被掩藏 size+=counter; } sizes.put(new Double(size),new String(temp.getName())); } System.out.println(sizes.values()); } else if(strOrder.equals("date")) { File[] subfiles=aFile.listFiles(); Map<Double,String> changetimes=new TreeMap<Double,String>(); Double counter=new Double(0); for(File temp:subfiles) { double changetime=temp.lastModified(); if(changetimes.get(changetime)!=null) { counter+=0.000000001; changetime+=counter; } changetimes.put(new Double(changetime),new String(temp.getName())); } System.out.println(changetimes.values()); } else if(strOrder.equals("type")) { Map<String,String> suffixs=new TreeMap<String,String>(); Integer counter=new Integer(0); for(String temp:filenames) { File tempfile=new File(temp); int index=temp.lastIndexOf("."); if(tempfile.isDirectory()||index<0) { suffixs.put(new String(temp),new String(temp)); } else { counter++; String suffix=temp.substring(index, temp.length())+counter.toString(); suffixs.put(new String(suffix),new String(temp)); } } System.out.println(suffixs.values()); } else { throw Exception; } } } private long getFileSize(File pFile) { long sumlength=0; if(pFile.isFile()) { sumlength+=pFile.length(); } else { File[] subfiles=pFile.listFiles(); for(File temp:subfiles) { sumlength+=getFileSize(temp); } } return sumlength; } private void command_rename() { String oldFileName=aFile.getAbsolutePath(),newFileName=aFile.getAbsolutePath(); try { System.out.print("Enter the old name of file:"); oldFileName=new String(aBR.readLine()); System.out.print("Enter the new name of file:"); newFileName=new String(aBR.readLine()); File oldFile=new File(aFile.getAbsolutePath()+File.separator+oldFileName); File newFile=new File(aFile.getAbsolutePath()+File.separator+newFileName); if(oldFile.exists()) { if(oldFile.isDirectory()) { oldFile.renameTo(newFile); } else { int index_old=oldFileName.lastIndexOf("."); String suffix_old=oldFileName.substring(index_old, oldFileName.length()); int index_new=newFileName.lastIndexOf("."); String suffix_new=newFileName.substring(index_new, newFileName.length()); if(suffix_old.equals(suffix_new)) { oldFile.renameTo(newFile);