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java 文件工具类 FileUtil 备忘笔记 [复制链接]

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发表于 2012-03-11 18:39 |只看该作者 |倒序浏览

java 文件工具类 FileUtil 备忘笔记

Java代码

1.package com.woyo.utils;
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.import java.util.HashSet;
10.import java.util.Set;
11.
12.import org.apache.log4j.Logger;
13./**
14. * 过滤指路歌曲文件
15. * @author dylan_xu
16. * @date Mar 11, 2012
17. * @modified by
18. * @modified date
19. * @since JDK1.6
20. * @see com.woyo.utils.FileUtil
21. */
22.public class FileUtil {
23. public static Logger logger = Logger.getLogger(FileUtil.class);
24. public static Set<String> sets = new HashSet<String>();
25.
26. public static void main(String[] args) {
27. refreshFileList("G:\\Music");
28. //moveFolder("G:\\music\\周杰伦", "E:\\Kugou");
29. }
30.
31. /**
32. * 过滤MP3文件
33. *
34. * @param strPath
35. */
36. public static void refreshFileList(String strPath) {
37. File dir = new File(strPath);
38. File[] files = dir.listFiles();
39. if (files == null) {
40. return;
41. }
42. for (int i = 0; i < files.length; i++) {
43. if (files[i].isDirectory()) {
44. refreshFileList(files[i].getAbsolutePath());
45. } else {
46. String strFilePath = files[i].getAbsolutePath().toLowerCase();
47. String strName = files[i].getName();
48. if (strName.endsWith(".mp3")) {
49. boolean bFlag = sets.add(strName);
50. if (bFlag == Boolean.FALSE) {
51. // 删除重复文件
52. removeFile(strFilePath);
53. }
54. }
55. // System.out.println("FILE_PATH:" + strFilePath + "|strName:" +
56. // strName);
57. }
58. }
59. }
60.
61. /**
62. * 创建文件夹
63. *
64. * @param strFilePath
65. * 文件夹路径
66. */
67. public boolean mkdirFolder(String strFilePath) {
68. boolean bFlag = false;
69. try {
70. File file = new File(strFilePath.toString());
71. if (!file.exists()) {
72. bFlag = file.mkdir();
73. }
74. } catch (Exception e) {
75. logger.error("新建目录操作出错" + e.getLocalizedMessage());
76. e.printStackTrace();
77. }
78. return bFlag;
79. }
80.
81. public boolean createFile(String strFilePath, String strFileContent) {
82. boolean bFlag = false;
83. try {
84. File file = new File(strFilePath.toString());
85. if (!file.exists()) {
86. bFlag = file.createNewFile();
87. }
88. if (bFlag == Boolean.TRUE) {
89. FileWriter fw = new FileWriter(file);
90. PrintWriter pw = new PrintWriter(fw);
91. pw.println(strFileContent.toString());
92. pw.close();
93. }
94. } catch (Exception e) {
95. logger.error("新建文件操作出错" + e.getLocalizedMessage());
96. e.printStackTrace();
97. }
98. return bFlag;
99. }
100.
101. /**
102. * 删除文件
103. *
104. * @param strFilePath
105. * @return
106. */
107. public static boolean removeFile(String strFilePath) {
108. boolean result = false;
109. if (strFilePath == null || "".equals(strFilePath)) {
110. return result;
111. }
112. File file = new File(strFilePath);
113. if (file.isFile() && file.exists()) {
114. result = file.delete();
115. if (result == Boolean.TRUE) {
116. logger.debug("[REMOE_FILE:" + strFilePath + "删除成功!]");
117. } else {
118. logger.debug("[REMOE_FILE:" + strFilePath + "删除失败]");
119. }
120. }
121. return result;
122. }
123.
124. /**
125. * 删除文件夹(包括文件夹中的文件内容，文件夹)
126. *
127. * @param strFolderPath
128. * @return
129. */
130. public static boolean removeFolder(String strFolderPath) {
131. boolean bFlag = false;
132. try {
133. if (strFolderPath == null || "".equals(strFolderPath)) {
134. return bFlag;
135. }
136. File file = new File(strFolderPath.toString());
137. bFlag = file.delete();
138. if (bFlag == Boolean.TRUE) {
139. logger.debug("[REMOE_FOLDER:" + file.getPath() + "删除成功!]");
140. } else {
141. logger.debug("[REMOE_FOLDER:" + file.getPath() + "删除失败]");
142. }
143. } catch (Exception e) {
144. logger.error("FLOADER_PATH:" + strFolderPath + "删除文件夹失败!");
145. e.printStackTrace();
146. }
147. return bFlag;
148. }
149.
150. /**
151. * 移除所有文件
152. *
153. * @param strPath
154. */
155. public static void removeAllFile(String strPath) {
156. File file = new File(strPath);
157. if (!file.exists()) {
158. return;
159. }
160. if (!file.isDirectory()) {
161. return;
162. }
163. String[] fileList = file.list();
164. File tempFile = null;
165. for (int i = 0; i < fileList.length; i++) {
166. if (strPath.endsWith(File.separator)) {
167. tempFile = new File(strPath + fileList[i]);
168. } else {
169. tempFile = new File(strPath + File.separator + fileList[i]);
170. }
171. if (tempFile.isFile()) {
172. tempFile.delete();
173. }
174. if (tempFile.isDirectory()) {
175. removeAllFile(strPath + "/" + fileList[i]);// 下删除文件夹里面的文件
176. removeFolder(strPath + "/" + fileList[i]);// 删除文件夹
177. }
178. }
179. }
180.
181. public static void copyFile(String oldPath, String newPath) {
182. try {
183. int bytesum = 0;
184. int byteread = 0;
185. File oldfile = new File(oldPath);
186. if (oldfile.exists()) { // 文件存在时
187. InputStream inStream = new FileInputStream(oldPath); // 读入原文件
188. FileOutputStream fs = new FileOutputStream(newPath);
189. byte[] buffer = new byte[1444];
190. while ((byteread = inStream.read(buffer)) != -1) {
191. bytesum += byteread; // 字节数文件大小
192. System.out.println(bytesum);
193. fs.write(buffer, 0, byteread);
194. }
195. inStream.close();
196. logger.debug("[COPY_FILE:" + oldfile.getPath() + "复制文件成功!]");
197. }
198. } catch (Exception e) {
199. System.out.println("复制单个文件操作出错 ");
200. e.printStackTrace();
201. }
202. }
203.
204. public static void copyFolder(String oldPath, String newPath) {
205. try {
206. (new File(newPath)).mkdirs(); // 如果文件夹不存在则建立新文件夹
207. File a = new File(oldPath);
208. String[] file = a.list();
209. File temp = null;
210. for (int i = 0; i < file.length; i++) {
211. if (oldPath.endsWith(File.separator)) {
212. temp = new File(oldPath + file[i]);
213. } else {
214. temp = new File(oldPath + File.separator + file[i]);
215. }
216. if (temp.isFile()) {
217. FileInputStream input = new FileInputStream(temp);
218. FileOutputStream output = new FileOutputStream(newPath
219. + "/ " + (temp.getName()).toString());
220. byte[] b = new byte[1024 * 5];
221. int len;
222. while ((len = input.read(b)) != -1) {
223. output.write(b, 0, len);
224. }
225. output.flush();
226. output.close();
227. input.close();
228. logger.debug("[COPY_FILE:" + temp.getPath() + "复制文件成功!]");
229. }
230. if (temp.isDirectory()) {// 如果是子文件夹
231. copyFolder(oldPath + "/ " + file[i], newPath + "/ "
232. + file[i]);
233. }
234. }
235. } catch (Exception e) {
236. System.out.println("复制整个文件夹内容操作出错 ");
237. e.printStackTrace();
238. }
239. }
240.
241. public static void moveFile(String oldPath, String newPath) {
242. copyFile(oldPath, newPath);
243. //removeFile(oldPath);
244. }
245.
246. public static void moveFolder(String oldPath, String newPath) {
247. copyFolder(oldPath, newPath);
248. //removeFolder(oldPath);
249. }
250.}

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