原创Java版的Shell

 1 /**
 2  * 
 3  */
 4 package com.b510.scanFiles.dao;
 5 
 6 /**
 7  * the interface for the Scan Files
 8  * @author Hongten
 9  * @created Feb 12, 2014
10  */
11 public interface ScanFiles {
12 
13     public int scan(String[] inputs);
14     public void handleCD(String[] inputs);
15     public void scanFiles(String[] inputs);
16 }

  1 /**
  2  * 
  3  */
  4 package com.b510.scanFiles.dao.impl;
  5 
  6 import java.io.File;
  7 
  8 import com.b510.scanFiles.dao.ScanFiles;
  9 import com.b510.scanFiles.utils.CommonUtil;
 10 import com.b510.scanFiles.utils.PrintUtil;
 11 
 12 /**
 13  * the Delegate for the Scan Files.
 14  * @author Hongten
 15  * @created Feb 12, 2014
 16  */
 17 public class ScanDelegate implements ScanFiles, Runnable {
 18 
 19     @SuppressWarnings("unused")
 20     private String[] inputs;
 21     private String path;
 22     private String suffix;
 23     private int targetCount;
 24     private int folderCount;
 25     private long startTime;
 26 
 27     public ScanDelegate(String[] inputs) {
 28         this.inputs = inputs;
 29     }
 30 
 31     public ScanDelegate(String path, String suffix) {
 32         this.path = path;
 33         this.suffix = suffix;
 34     }
 35 
 36     public void scanFiles(String[] inputs) {
 37         ScanDelegate delegate = new ScanDelegate(inputs[0], inputs[1]);
 38         new Thread(delegate).start();
 39     }
 40 
 41     /**
 42      * scan the file(s) from the path,that user give.and return the count of the file(s).
 43      */
 44     public int scan(String[] inputs) {
 45         int fileCount = 0;
 46         File file = new File(inputs[0]);
 47         if (!file.exists()) {
 48             PrintUtil.printInfo(CommonUtil.INCORRECT_PATH);
 49         } else {
 50             File[] subFile = file.listFiles();
 51             if (null == subFile || subFile.length == 0) {
 52                 return fileCount;
 53             }
 54             for (int i = 0; i < subFile.length; i++) {
 55                 if (subFile[i].isDirectory()) {
 56                     folderCount++;
 57                     fileCount += scan(new String[] { subFile[i].getAbsolutePath() });
 58                 } else if (subFile[i].isFile()) {
 59                     if (getPostfix(subFile[i].getName()).equalsIgnoreCase(suffix)) {
 60                         PrintUtil.printInfo(CommonUtil.FIND_FILE + subFile[i].getAbsolutePath());
 61                         targetCount++;
 62                     }
 63                     fileCount++;
 64                 }
 65             }
 66         }
 67         return fileCount;
 68     }
 69 
 70     public void run() {
 71         startTime = System.currentTimeMillis();
 72         int num = scan(new String[] { path });
 73         printResult(num);
 74     }
 75 
 76     private void printResult(int num) {
 77         PrintUtil.printInfo(CommonUtil.BOUNDARY);
 78         PrintUtil.printInfo(CommonUtil.LEFT_BLANKETS + path + CommonUtil.CONTAINS);
 79         PrintUtil.printInfo(CommonUtil.FOLDERS + folderCount);
 80         PrintUtil.printInfo(CommonUtil.FILES + num);
 81         PrintUtil.printInfo(CommonUtil.TARGET + suffix + CommonUtil.TARGET_FILES + targetCount);
 82         PrintUtil.printInfo(CommonUtil.BOUNDARY);
 83         long entTime = System.currentTimeMillis();
 84         PrintUtil.printInfo(CommonUtil.SPEND + (entTime - startTime) + CommonUtil.MS);
 85     }
 86 
 87     /**
 88      * handle the situation,e.g: "cd e:\"
 89      */
 90     public void handleCD(String[] inputs) {
 91         File file = new File(inputs[1]);
 92         if (!file.exists()) {
 93             PrintUtil.printInfo(CommonUtil.INCORRECT_PATH);
 94         } else {
 95             File[] listFiles = file.listFiles();
 96             for (int i = 0; i < listFiles.length; i++) {
 97                 PrintUtil.printInfo(listFiles[i].getName());
 98             }
 99             PrintUtil.printInfo(CommonUtil.BOUNDARY + "\n"+ CommonUtil.TOTAL + listFiles.length);
100         }
101     }
102 
103     /**
104      * get the suffix of a string,e.g : "test.txt"<br>
105      * and return the string is "txt".
106      * @param inputFilePath
107      * @return
108      */
109     public String getPostfix(String inputFilePath) {
110         return inputFilePath.substring(inputFilePath.lastIndexOf(CommonUtil.POINT) + 1);
111     }
112 }

 1 /**
 2  * 
 3  */
 4 package com.b510.scanFiles.dao.impl;
 5 
 6 import com.b510.scanFiles.dao.ScanFiles;
 7 import com.b510.scanFiles.utils.CommonUtil;
 8 import com.b510.scanFiles.utils.PrintUtil;
 9 
10 /**
11  * @author Hongten
12  * @created Feb 12, 2014
13  */
14 public class ScanProxy implements ScanFiles {
15 
16     private ScanFiles scanDelegate;
17 
18     public ScanProxy(ScanFiles scanDelegate) {
19         this.scanDelegate = scanDelegate;
20     }
21 
22     public int scan(String[] inputs) {
23         scanFiles(inputs);
24         return 0;
25     }
26 
27     public void handleCD(String[] inputs) {
28         PrintUtil.printInfo(CommonUtil.BOUNDARY);
29         long startTime = System.currentTimeMillis();
30         scanDelegate.handleCD(inputs);
31         long entTime = System.currentTimeMillis();
32         PrintUtil.printInfo(CommonUtil.BOUNDARY);
33         PrintUtil.printInfo(CommonUtil.SPEND + (entTime - startTime) + CommonUtil.MS);
34     }
35 
36     public void scanFiles(String[] inputs) {
37         scanDelegate.scanFiles(inputs);
38     }
39 
40 }

 1 /**
 2  * 
 3  */
 4 package com.b510.scanFiles.factory;
 5 
 6 import com.b510.scanFiles.dao.ScanFiles;
 7 import com.b510.scanFiles.dao.impl.ScanDelegate;
 8 import com.b510.scanFiles.dao.impl.ScanProxy;
 9 
10 /**
11  * The factory of the static proxy
12  * @author Hongten
13  * @created Feb 12, 2014
14  */
15 public class ScanFilesFactory {
16 
17     public static ScanFiles getInstance(String[] inputs){
18         return new ScanProxy(new ScanDelegate(inputs));
19     }
20 }

 1 /**
 2  * 
 3  */
 4 package com.b510.scanFiles.utils;
 5 
 6 /**
 7  * @author Hongten
 8  * @created Feb 12, 2014
 9  */
10 public class CommonUtil {
11 
12     public static final String DESCRIPTION = "Please input as this format :\n[C:\\ png] or [cd C:\\]";
13     public static final String EXIT_SYSTEM = "exited system.";
14     public static final String INCORRECT_PATH = "Incorrect path!";
15     public static final String INCORRECT_INPUT_FORMAT = "Incorrect input format!";
16     public static final String CD = "cd";
17     public static final String BLANK = " ";
18     public static final String EXIT = "exit";
19     public static final String POINT = ".";
20     
21     public static final String BOUNDARY = "======================================";
22     public static final String LEFT_BLANKETS = "[";
23     public static final String CONTAINS = "]  contains :";
24     public static final String FOLDERS = "folder(s)              : ";
25     public static final String FILES = "file(s)                : ";
26     public static final String TARGET = "target [";
27     public static final String TARGET_FILES = "] file(s)  : ";
28     public static final String SPEND = "Spend :[";
29     public static final String FIND_FILE = "Find file : ";
30     public static final String MS = "]ms";
31     public static final String TOTAL = "Total :";
32 
33     
34     public static final int TWO = 2;
35 }

 1 /**
 2  * 
 3  */
 4 package com.b510.scanFiles.utils;
 5 
 6 /**
 7  * @author Hongten
 8  * @created Feb 12, 2014
 9  */
10 public class PrintUtil {
11 
12     public static void printInfo(String info) {
13         System.out.println(info);
14     }
15 
16     public static void printInfo(StringBuffer info) {
17         System.out.println(info);
18     }
19 
20     public static void printInfo(char info) {
21         System.out.println(info);
22     }
23 }

  1 /**
  2  * 
  3  */
  4 package com.b510.scanFiles.client;
  5 
  6 import java.util.Scanner;
  7 
  8 import com.b510.scanFiles.dao.ScanFiles;
  9 import com.b510.scanFiles.factory.ScanFilesFactory;
 10 import com.b510.scanFiles.utils.CommonUtil;
 11 import com.b510.scanFiles.utils.PrintUtil;
 12 
 13 /**
 14  * The Client class,User can input some content in the console.<br>
 15  * and the system will monitoring the console and get the content and process it.
 16  * @author Hongten
 17  * @created Feb 12, 2014
 18  */
 19 public class Client {
 20 
 21     private Scanner inputStreamScanner;
 22     private boolean controlFlag = false;
 23 
 24     public static void main(String[] args) {
 25         Client client = new Client();
 26         client.monitoringConsoleAndHandleContent();
 27     }
 28 
 29     public Client() {
 30         inputStreamScanner = new Scanner(System.in);
 31     }
 32 
 33     /**
 34      * This is a monitor,which can monitoring the console and handle the input content.
 35      */
 36     public void monitoringConsoleAndHandleContent() {
 37         PrintUtil.printInfo(CommonUtil.DESCRIPTION);
 38         try {
 39             while (!controlFlag && inputStreamScanner.hasNext()) {
 40                 processingConsoleInput();
 41             }
 42         } catch (Exception e) {
 43             e.printStackTrace();
 44         } finally {
 45             closeScanner();
 46         }
 47     }
 48 
 49     private void closeScanner() {
 50         inputStreamScanner.close();
 51     }
 52 
 53     /**
 54      * Processing the content that user inputed.
 55      */
 56     private void processingConsoleInput() {
 57         String inputContent = inputStreamScanner.nextLine();
 58         if (!inputContent.isEmpty()) {
 59             controlFlag = exit(inputContent);
 60             if (!controlFlag) {
 61                 notExit(inputContent);
 62             }
 63         }
 64     }
 65 
 66     /**
 67      * When the user input the keyword <code>"exit"</code>(ignore case),then the system will be exit.
 68      * @param inputContent
 69      */
 70     private boolean exit(String inputContent) {
 71         if (CommonUtil.EXIT.equalsIgnoreCase(inputContent)) {
 72             controlFlag = true;
 73             systemExit();
 74         }
 75         return controlFlag;
 76     }
 77 
 78     /**
 79      * System.exit(0);
 80      */
 81     private void systemExit() {
 82         PrintUtil.printInfo(CommonUtil.EXIT_SYSTEM);
 83         System.exit(0);
 84     }
 85 
 86     /**
 87      * different with the method "exit()"
 88      * @param inputContent
 89      */
 90     private void notExit(String inputContent) {
 91         String[] inputs = inputContent.split(CommonUtil.BLANK);
 92         if (null != inputs && inputs.length >= CommonUtil.TWO) {
 93             //the factory of the proxy
 94             ScanFiles factory = ScanFilesFactory.getInstance(inputs);
 95             if (CommonUtil.CD.equalsIgnoreCase(inputs[0])) {
 96                 factory.handleCD(inputs);
 97             } else {
 98                 factory.scan(inputs);
 99             }
100         } else {
101             PrintUtil.printInfo(CommonUtil.INCORRECT_INPUT_FORMAT);
102         }
103     }
104 }