1 //1.创建文件夹 2 //import java.io.*; 3 File myFolderPath = new File(str1); 4 try { 5 if (!myFolderPath.exists()) { 6 myFolderPath.mkdir(); 7 } 8 } 9 catch (Exception e) { 10 System.out.println("新建目录操作出错"); 11 e.printStackTrace(); 12 } 13 14 //2.创建文件 15 //import java.io.*; 16 File myFilePath = new File(str1); 17 try { 18 if (!myFilePath.exists()) { 19 myFilePath.createNewFile(); 20 } 21 FileWriter resultFile = new FileWriter(myFilePath); 22 PrintWriter myFile = new PrintWriter(resultFile); 23 myFile.println(str2); 24 resultFile.close(); 25 } 26 catch (Exception e) { 27 System.out.println("新建文件操作出错"); 28 e.printStackTrace(); 29 } 30 31 //3.删除文件 32 //import java.io.*; 33 File myDelFile = new File(str1); 34 try { 35 myDelFile.delete(); 36 } 37 catch (Exception e) { 38 System.out.println("删除文件操作出错"); 39 e.printStackTrace(); 40 } 41 42 //4.删除文件夹 43 //import java.io.*; 44 File delFolderPath = new File(str1); 45 try { 46 delFolderPath.delete(); //删除空文件夹 47 } 48 catch (Exception e) { 49 System.out.println("删除文件夹操作出错"); 50 e.printStackTrace(); 51 } 52 53 //5.删除一个文件下夹所有的文件夹 54 //import java.io.*; 55 File delfile=new File(str1); 56 File[] files=delfile.listFiles(); 57 for(int i=0;i<files.length;i++){ 58 if(files[i].isDirectory()){ 59 files[i].delete(); 60 } 61 } 62 63 //6.清空文件夹 64 //import java.io.*; 65 File delfilefolder=new File(str1); 66 try { 67 if (!delfilefolder.exists()) { 68 delfilefolder.delete(); 69 } 70 delfilefolder.mkdir(); 71 } 72 catch (Exception e) { 73 System.out.println("清空目录操作出错"); 74 e.printStackTrace(); 75 } 76 77 //7.读取文件 78 //import java.io.*; 79 // 逐行读取数据 80 FileReader fr = new FileReader(str1); 81 BufferedReader br = new BufferedReader(fr); 82 String str2 = br.readLine(); 83 while (str2 != null) { 84 str3 85 str2 = br.readLine(); 86 } 87 br.close(); 88 fr.close(); 89 90 //8.写入文件 91 //import java.io.*; 92 // 将数据写入文件 93 try { 94 FileWriter fw = new FileWriter(str1); 95 fw.write(str2); 96 fw.flush(); 97 fw.close(); 98 } catch (IOException e) { 99 e.printStackTrace(); 100 } 101 102 //9.写入随机文件 103 //import java.io.*; 104 try { 105 RandomAcessFile logFile=new RandomAcessFile(str1,"rw"); 106 long lg=logFile.length(); 107 logFile.seek(str2); 108 logFile.writeByte(str3); 109 }catch(IOException ioe){ 110 System.out.println("无法写入文件:"+ioe.getMessage()); 111 } 112 113 //10.读取文件属性 114 //import java.io.*; 115 // 文件属性的取得 116 File f = new File(str1); 117 if (af.exists()) { 118 System.out.println(f.getName() + "的属性如下: 文件长度为:" + f.length()); 119 System.out.println(f.isFile() ? "是文件" : "不是文件"); 120 System.out.println(f.isDirectory() ? "是目录" : "不是目录"); 121 System.out.println(f.canRead() ? "可读取" : "不"); 122 System.out.println(f.canWrite() ? "是隐藏文件" : ""); 123 System.out.println("文件夹的最后修改日期为:" + new Date(f.lastModified())); 124 } else { 125 System.out.println(f.getName() + "的属性如下:"); 126 System.out.println(f.isFile() ? "是文件" : "不是文件"); 127 System.out.println(f.isDirectory() ? "是目录" : "不是目录"); 128 System.out.println(f.canRead() ? "可读取" : "不"); 129 System.out.println(f.canWrite() ? "是隐藏文件" : ""); 130 System.out.println("文件的最后修改日期为:" + new Date(f.lastModified())); 131 } 132 if(f.canRead()){ 133 str2 134 } 135 if(f.canWrite()){ 136 str3 137 } 138 139 //11.写入属性 140 //import java.io.*; 141 File filereadonly=new File(str1); 142 try { 143 boolean b=filereadonly.setReadOnly(); 144 } 145 catch (Exception e) { 146 System.out.println("拒绝写访问:"+e.printStackTrace()); 147 } 148 149 //12.枚举一个文件夹中的所有文件 150 //import java.io.*; 151 //import java.util.*; 152 LinkedList<String> folderList = new LinkedList<String>(); 153 folderList.add(str1); 154 while (folderList.size() > 0) { 155 File file = new File(folderList.peek()); 156 folderList.removeLast(); 157 File[] files = file.listFiles(); 158 ArrayList<File> fileList = new ArrayList<File>(); 159 for (int i = 0; i < files.length; i++) { 160 if (files[i].isDirectory()) { 161 folderList.add(files[i].getPath()); 162 } else { 163 fileList.add(files[i]); 164 } 165 } 166 for (File f : fileList) { 167 str2=f.getAbsoluteFile(); 168 str3 169 } 170 } 171 172 //13.复制文件夹 173 //import java.io.*; 174 //import java.util.*; 175 LinkedList<String> folderList = new LinkedList<String>(); 176 folderList.add(str1); 177 LinkedList<String> folderList2 = new LinkedList<String>(); 178 folderList2.add(str2+ str1.substring(str1.lastIndexOf("\\"))); 179 while (folderList.size() > 0) { 180 (new File(folderList2.peek())).mkdirs(); // 如果文件夹不存在 则建立新文件夹 181 File folders = new File(folderList.peek()); 182 String[] file = folders.list(); 183 File temp = null; 184 try { 185 for (int i = 0; i < file.length; i++) { 186 if (folderList.peek().endsWith(File.separator)) { 187 temp = new File(folderList.peek() + File.separator 188 + file[i]); 189 } else { 190 temp = new File(folderList.peek() + File.separator + file[i]); 191 } 192 if (temp.isFile()) { 193 FileInputStream input = new FileInputStream(temp); 194 FileOutputStream output = new FileOutputStream( 195 folderList2.peek() + File.separator + (temp.getName()).toString()); 196 byte[] b = new byte[5120]; 197 int len; 198 while ((len = input.read(b)) != -1) { 199 output.write(b, 0, len); 200 } 201 output.flush(); 202 output.close(); 203 input.close(); 204 } 205 if (temp.isDirectory()) {// 如果是子文件夹 206 for (File f : temp.listFiles()) { 207 if (f.isDirectory()) { 208 folderList.add(f.getPath()); 209 folderList2.add(folderList2.peek() 210 + File.separator + f.getName()); 211 } 212 } 213 } 214 } 215 } catch (Exception e) { 216 //System.out.println("复制整个文件夹内容操作出错"); 217 e.printStackTrace(); 218 } 219 folderList.removeFirst(); 220 folderList2.removeFirst(); 221 } 222 223 //14.复制一个文件夹下所有的文件夹到另一个文件夹下 224 //import java.io.*; 225 //import java.util.*; 226 File copyfolders=new File(str1); 227 File[] copyfoldersList=copyfolders.listFiles(); 228 for(int k=0;k<copyfoldersList.length;k++){ 229 if(copyfoldersList[k].isDirectory()){ 230 ArrayList<String>folderList=new ArrayList<String>(); 231 folderList.add(copyfoldersList[k].getPath()); 232 ArrayList<String>folderList2=new ArrayList<String>(); 233 folderList2.add(str2+"/"+copyfoldersList[k].getName()); 234 for(int j=0;j<folderList.length;j++){ 235 (new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹 236 File folders=new File(folderList.get(j)); 237 String[] file=folders.list(); 238 File temp=null; 239 try { 240 for (int i = 0; i < file.length; i++) { 241 if(folderList.get(j).endsWith(File.separator)){ 242 temp=new File(folderList.get(j)+"/"+file[i]); 243 } else { 244 temp=new File(folderList.get(j)+"/"+File.separator+file[i]); 245 } 246 FileInputStream input = new FileInputStream(temp); 247 if(temp.isFile()){ 248 FileInputStream input = new FileInputStream(temp); 249 FileOutputStream output = new FileOutputStream(folderList2.get(j) + "/" + (temp.getName()).toString()); 250 byte[] b = new byte[5120]; 251 int len; 252 while ( (len = input.read(b)) != -1) { 253 output.write(b, 0, len); 254 } 255 output.flush(); 256 output.close(); 257 input.close(); 258 } 259 if(temp.isDirectory()){//如果是子文件夹 260 folderList.add(folderList.get(j)+"/"+file[i]); 261 folderList2.add(folderList2.get(j)+"/"+file[i]); 262 } 263 } 264 } 265 catch (Exception e) { 266 System.out.println("复制整个文件夹内容操作出错"); 267 e.printStackTrace(); 268 } 269 } 270 } 271 } 272 273 //15.移动文件夹 274 //import java.io.*; 275 //import java.util.*; 276 LinkedList<String> folderList = new LinkedList<String>(); 277 folderList.add(str1); 278 LinkedList<String> folderList2 = new LinkedList<String>(); 279 folderList2.add(str2 + str1.substring(str1.lastIndexOf("\\"))); 280 while (folderList.size() > 0) { 281 (new File(folderList2.peek())).mkdirs(); // 如果文件夹不存在 则建立新文件夹 282 File folders = new File(folderList.peek()); 283 String[] file = folders.list(); 284 File temp = null; 285 try { 286 for (int i = 0; i < file.length; i++) { 287 if (folderList.peek().endsWith(File.separator)) { 288 temp = new File(folderList.peek() + File.separator + file[i]); 289 } else { 290 temp = new File(folderList.peek() + File.separator + file[i]); 291 } 292 if (temp.isFile()) { 293 FileInputStream input = new FileInputStream(temp); 294 FileOutputStream output = new FileOutputStream( 295 folderList2.peek() + File.separator + (temp.getName()).toString()); 296 byte[] b = new byte[5120]; 297 int len; 298 while ((len = input.read(b)) != -1) { 299 output.write(b, 0, len); 300 } 301 output.flush(); 302 output.close(); 303 input.close(); 304 if (!temp.delete()) 305 System.out.println("删除单个文件操作出错!"); 306 } 307 if (temp.isDirectory()) {// 如果是子文件夹 308 for (File f : temp.listFiles()) { 309 if (f.isDirectory()) { 310 folderList.add(f.getPath()); 311 folderList2.add(folderList2.peek() + File.separator + f.getName()); 312 } 313 } 314 } 315 } 316 } catch (Exception e) { 317 // System.out.println("复制整个文件夹内容操作出错"); 318 e.printStackTrace(); 319 } 320 folderList.removeFirst(); 321 folderList2.removeFirst(); 322 } 323 File f = new File(str1); 324 if (!f.delete()) { 325 for (File file : f.listFiles()) { 326 if (file.list().length == 0) { 327 System.out.println(file.getPath()); 328 file.delete(); 329 } 330 } 331 } 332 //16.移动一个文件夹下所有的文件夹到另一个目录下 333 //import java.io.*; 334 //import java.util.*; 335 File movefolders=new File(str1); 336 File[] movefoldersList=movefolders.listFiles(); 337 for(int k=0;k<movefoldersList.length;k++){ 338 if(movefoldersList[k].isDirectory()){ 339 ArrayList<String>folderList=new ArrayList<String>(); 340 folderList.add(movefoldersList[k].getPath()); 341 ArrayList<String>folderList2=new ArrayList<String>(); 342 folderList2.add(str2+"/"+movefoldersList[k].getName()); 343 for(int j=0;j<folderList.length;j++){ 344 (new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹 345 File folders=new File(folderList.get(j)); 346 String[] file=folders.list(); 347 File temp=null; 348 try { 349 for (int i = 0; i < file.length; i++) { 350 if(folderList.get(j).endsWith(File.separator)){ 351 temp=new File(folderList.get(j)+"/"+file[i]); 352 } 353 else{ 354 temp=new File(folderList.get(j)+"/"+File.separator+file[i]); 355 } 356 FileInputStream input = new FileInputStream(temp); 357 if(temp.isFile()){ 358 FileInputStream input = new FileInputStream(temp); 359 FileOutputStream output = new FileOutputStream(folderList2.get(j) + "/" + (temp.getName()).toString()); 360 byte[] b = new byte[5120]; 361 int len; 362 while ( (len = input.read(b)) != -1) { 363 output.write(b, 0, len); 364 } 365 output.flush(); 366 output.close(); 367 input.close(); 368 temp.delete(); 369 } 370 if(temp.isDirectory()){//如果是子文件夹 371 folderList.add(folderList.get(j)+"/"+file[i]); 372 folderList2.add(folderList2.get(j)+"/"+file[i]); 373 } 374 } 375 } 376 catch (Exception e) { 377 System.out.println("复制整个文件夹内容操作出错"); 378 e.printStackTrace(); 379 } 380 } 381 movefoldersList[k].delete(); 382 } 383 } 384 385 //17.以一个文件夹的框架在另一个目录创建文件夹和空文件 386 //import java.io.*; 387 //import java.util.*; 388 boolean b=false;//不创建空文件 389 ArrayList<String>folderList=new ArrayList<String>(); 390 folderList.add(str1); 391 ArrayList<String>folderList2=new ArrayList<String>(); 392 folderList2.add(str2); 393 for(int j=0;j<folderList.length;j++){ 394 (new File(folderList2.get(j))).mkdirs(); //如果文件夹不存在 则建立新文件夹 395 File folders=new File(folderList.get(j)); 396 String[] file=folders.list(); 397 File temp=null; 398 try { 399 for (int i = 0; i < file.length; i++) { 400 if(folderList.get(j).endsWith(File.separator)){ 401 temp=new File(folderList.get(j)+"/"+file[i]); 402 } 403 else{ 404 temp=new File(folderList.get(j)+"/"+File.separator+file[i]); 405 } 406 FileInputStream input = new FileInputStream(temp); 407 if(temp.isFile()){ 408 if (b) temp.createNewFile(); 409 } 410 if(temp.isDirectory()){//如果是子文件夹 411 folderList.add(folderList.get(j)+"/"+file[i]); 412 folderList2.add(folderList2.get(j)+"/"+file[i]); 413 } 414 } 415 } 416 catch (Exception e) { 417 System.out.println("复制整个文件夹内容操作出错"); 418 e.printStackTrace(); 419 } 420 } 421 422 //18.复制文件 423 //import java.io.*; 424 int bytesum = 0; 425 int byteread = 0; 426 File oldfile = new File(str1); 427 try { 428 if (oldfile.exists()) { //文件存在时 429 FileInputStream inStream = new FileInputStream(oldfile); //读入原文件 430 FileOutputStream fs = new FileOutputStream(new File(str2,oldfile.getName())); 431 byte[] buffer = new byte[5120]; 432 int length; 433 while ( (byteread = inStream.read(buffer)) != -1) { 434 bytesum += byteread; //字节数 文件大小 435 System.out.println(bytesum); 436 fs.write(buffer, 0, byteread); 437 } 438 inStream.close(); 439 } 440 } 441 catch (Exception e) { 442 System.out.println("复制单个文件操作出错"); 443 e.printStackTrace(); 444 } 445 446 //19.复制一个文件夹下所有的文件到另一个目录 447 //import java.io.*; 448 File copyfiles=new File(str1); 449 File[] files=copyfiles.listFiles(); 450 for(int i=0;i<files.length;i++){ 451 if(!files[i].isDirectory()){ 452 int bytesum = 0; 453 int byteread = 0; 454 try { 455 InputStream inStream = new FileInputStream(files[i]); //读入原文件 456 FileOutputStream fs = new FileOutputStream(new File(str2,files[i].getName()); 457 byte[] buffer = new byte[5120]; 458 int length; 459 while ( (byteread = inStream.read(buffer)) != -1) { 460 bytesum += byteread; //字节数 文件大小 461 System.out.println(bytesum); 462 fs.write(buffer, 0, byteread); 463 } 464 inStream.close(); 465 } catch (Exception e) { 466 System.out.println("复制单个文件操作出错"); 467 e.printStackTrace(); 468 } 469 } 470 } 471 472 //提取扩展名 473 String str2=str1.substring(str1.lastIndexOf(".")+1);
http://www.cnblogs.com/fnlingnzb-learner/p/6010165.html
时间: 2024-10-26 06:13:47