JAva fileファイル操作operate file of java

  1 package com.b510;
  2 
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.FileOutputStream;
  6 import java.io.FileWriter;
  7 import java.io.InputStream;
  8 import java.io.PrintWriter;
  9 
 10 /**
 11  * 
 12  * @author Hongten</br>
 13  * 
 14  *              
 15  * 
 16  *           ：http://www.newsmth.net/pc/pccon.php?id=2206&nid=318002
 17  * 
 18  * 
 19  */
 20 public class OperateFiles {
 21 
 22     /**
 23      * @param args
 24 */
 25     public static void main(String[] args) {
 26         OperateFiles operateFiles = new OperateFiles();
 27         //       
 28         operateFiles.newFolder("c:/hongten");
 29         //      ，         
 30         operateFiles.newFile("c:/hongten/Hello.txt", "hello,i'm Hongten.  ");
 31         //      
 32         operateFiles.deleteFile("c:/hongten/Hello.txt");
 33         //       
 34         operateFiles.deleteFolder("c:/hongten");
 35         //     
 36         operateFiles.copyFolder("c:/hongten", "e:/hongten");
 37         //        
 38         String expandedName=operateFiles.getExpandedName("c:/hongten/Hello.txt");
 39         System.out.println(expandedName);
 40         //       
 41         System.out.println(operateFiles.getFilePath("c:/hongten/Hello.txt"));
 42     }
 43 
 44     /**
 45      *         
 46      * @param filePath        ：c:/hongten/Hello.txt
 47      * @return         ：txt
 48 */
 49     public String getExpandedName(String filePath){
 50         return filePath.substring(filePath.lastIndexOf(".")+1);
 51     }
 52     /**
 53      *        
 54      * @param file      
 55      * @return      
 56 */
 57     public String getFilePath(String file){
 58         return file.substring(0,file.lastIndexOf("/"));  
 59     }
 60     /**
 61      *       
 62      * 
 63      * @param folderPath
 64      *                     ：c:\
ewFolder
 65 */
 66     public void newFolder(String folderPath) {
 67         try {
 68             File myFolderPath = new File(folderPath.toString());
 69             if (!myFolderPath.exists()) {
 70                 myFolderPath.mkdir();
 71             }
 72         } catch (Exception e) {
 73             System.out.println("        ");
 74             e.printStackTrace();
 75         }
 76     }
 77 
 78     /**
 79      *       
 80      * 
 81      * @param filePath
 82      *                     ：c:\\hongten.java
 83 */
 84     public void newFile(String filePath) {
 85         try {
 86             File myFilePathFile = new File(filePath.toString());
 87             if (!myFilePathFile.exists()) {
 88                 myFilePathFile.createNewFile();
 89             }
 90         } catch (Exception e) {
 91             System.out.println("       ");
 92             e.printStackTrace();
 93         }
 94     }
 95 
 96     /**
 97      *       ，          
 98      * 
 99      * @param filePath
100      *                     ：c:\\hongten.java
101      * @param fileContent
102      *                     
103 */
104     public void newFile(String filePath, String fileContent) {
105         try {
106             newFile(filePath);
107             FileWriter resultFile = new FileWriter(filePath);
108             PrintWriter myFile = new PrintWriter(resultFile);
109             myFile.println(fileContent);
110             resultFile.close();
111         } catch (Exception e) {
112             System.out.println("        ");
113             e.printStackTrace();
114         }
115     }
116 
117     /**
118      *       
119      * 
120      * @param filePath
121      *                        ：c:\\hongten\\Hello.txt
122 */
123     public void deleteFile(String filePath) {
124         try {
125             File preDelFile = new File(filePath);
126             if (preDelFile.exists()) {
127                 preDelFile.delete();
128             } else {
129                 System.out.println(filePath + "   ！");
130             }
131         } catch (Exception e) {
132             System.out.println("        ");
133             e.printStackTrace();
134         }
135     }
136 
137     /**
138      *        
139      * 
140      * @param folderPath
141      *                          ：c:\\hongten
142 */
143     public void deleteFolder(String folderPath) {
144         try {
145             delAllFiles(folderPath);
146             File preDelFoder = new File(folderPath);
147             if (preDelFoder.exists()) {
148                 preDelFoder.delete();
149             } else {
150                 System.out.println(folderPath + "   ！");
151             }
152         } catch (Exception e) {
153             System.out.println("        ");
154             e.printStackTrace();
155         }
156     }
157 
158     /**
159      *              
160      * 
161      * @param folderPath
162      *                          ：c:\\hongten
163 */
164     public void delAllFiles(String folderPath) {
165         File file = new File(folderPath);
166         if (!file.exists()) {
167             return;
168         }
169         if (!file.isDirectory()) {
170             return;
171         }
172         String[] tempList = file.list();
173         File temp = null;
174         for (int i = 0; i < tempList.length; i++) {
175             if (folderPath.endsWith(File.separator)) {
176                 temp = new File(folderPath + tempList[i]);
177             } else {
178                 temp = new File(folderPath + File.separator + tempList[i]);
179             }
180             if (temp.isFile()) {
181                 temp.delete();
182             }
183             if (temp.isDirectory()) {
184                 delAllFiles(folderPath + "/" + tempList[i]);//            
185                 deleteFolder(folderPath + "/" + tempList[i]);//        
186             }
187         }
188     }
189 
190     /**
191      *        
192      * 
193      * @param oldPath
194      *                 ：c:\\Hello.java
195      * @param newPath
196      *                 ：f:\\Hello.java
197 */
198     public void copyFile(String oldPath, String newPath) {
199         try {
200             int bytesum = 0;
201             int byteread = 0;
202             File oldfile = new File(oldPath);
203             if (oldfile.exists()) { //      
204                 InputStream inStream = new FileInputStream(oldPath); //      
205                 FileOutputStream fs = new FileOutputStream(newPath);
206                 byte[] buffer = new byte[1444];
207                 // int length = 0;
208                 while ((byteread = inStream.read(buffer)) != -1) {
209                     bytesum += byteread; //         
210                     fs.write(buffer, 0, byteread);
211                 }
212                 inStream.close();
213             }
214         } catch (Exception e) {
215             System.out.println("          ");
216             e.printStackTrace();
217 
218         }
219     }
220 
221     /**
222      *       
223      * 
224      * @param oldPath
225      *                    : c:\\hello
226      * @param newPath
227      *                    : e:\\hello
228 */
229     public void copyFolder(String oldPath, String newPath) {
230 
231         try {
232             (new File(newPath)).mkdirs(); //                 
233             File a = new File(oldPath);
234             String[] file = a.list();
235             File temp = null;
236             for (int i = 0; i < file.length; i++) {
237                 if (oldPath.endsWith(File.separator)) {
238                     temp = new File(oldPath + file[i]);
239                 } else {
240                     temp = new File(oldPath + File.separator + file[i]);
241                 }
242 
243                 if (temp.isFile()) {
244                     FileInputStream input = new FileInputStream(temp);
245                     FileOutputStream output = new FileOutputStream(newPath
246                             + "/" + (temp.getName()).toString());
247                     byte[] b = new byte[1024 * 5];
248                     int len;
249                     while ((len = input.read(b)) != -1) {
250                         output.write(b, 0, len);
251                     }
252                     output.flush();
253                     output.close();
254                     input.close();
255                 }
256                 if (temp.isDirectory()) {//        
257                     copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);
258                 }
259             }
260         } catch (Exception e) {
261             System.out.println("             ");
262             e.printStackTrace();
263 
264         }
265     }
266 
267     /**
268      *       
269      * 
270      * @param oldPath
271      *                   ：c:\\hello.java
272      * @param newPath
273      *                   ：e:\\hello.java
274 */
275     public void moveFile(String oldPath, String newPath) {
276         copyFile(oldPath, newPath);
277         deleteFile(oldPath);
278     }
279 
280     /**
281      *      
282      * 
283      * @param oldPath
284      *                    ：c:\\hongten
285      * @param newPath
286      *                    ：e:\\hongten
287 */
288     public void moveFolder(String oldPath, String newPath) {
289         copyFolder(oldPath, newPath);
290         deleteFolder(oldPath);
291     }
292 
293     /**
294      *            
295      * 
296      * @return
297 */
298     public String getPath() {
299         String sysPath = this.getClass().getResource("/").getPath();
300         //        
301         sysPath = sysPath.substring(1, sysPath.length() - 16);
302         return sysPath;
303     }
304 
305 }