java文件处理组件

java文件处理组件

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import com.ultrapower.eoms.common.RecordLog; /** * 文件处理组件 * @version Apr 21, 2010 5:50:00 PM */ public class FileOperUtil { /** * 删除目录下的所有文件 * @param path 文件夹路径 * @exception Exception */ public static void deleteFile(String path) throws Exception { File file = new File(path); if (file.isDirectory()) { File[] files = file.listFiles(); int len = files.length ; for (int i = 0; i < len; i++) { deleteFile(files[i].getAbsolutePath()); } } file.delete(); } /** * 新建目录 * @param folderPath 文件夹路径 例如:c:/test */ public static void newFolder(String folderPath) { try { String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); if (!myFilePath.exists()) { myFilePath.mkdir(); } } catch (Exception e) { RecordLog.printLog("新建目录,"+folderPath+ ",出错,"+e.getMessage(), RecordLog.LOG_LEVEL_ERROR); e.printStackTrace(); } } /** * 新建文件 * @param filePathAndName 文件路径 例如:c:/test/a.txt * @param fileContent 文件的内容 * @throws IOException */ public static void newFile(String filePathAndName, String fileContent) throws IOException { String filePath = filePathAndName; filePath = filePath.toString(); File myFilePath = new File(filePath); if (!myFilePath.exists()) { myFilePath.createNewFile(); } FileWriter resultFile = new FileWriter(myFilePath); PrintWriter myFile = new PrintWriter(resultFile); String strContent = fileContent; myFile.println(strContent); resultFile.close(); } /** * 删除文件 * * @param filePathAndName * 文件路径 例如:c:/test/a.txt */ public static void delFile(String filePathAndName) { try { String filePath = filePathAndName; filePath = filePath.toString(); java.io.File myDelFile = new java.io.File(filePath); myDelFile.delete(); } catch (Exception e) { RecordLog.printLog("删除文件,"+filePathAndName+ ",出错,"+e.getMessage(), RecordLog.LOG_LEVEL_ERROR); e.printStackTrace(); } } /** * 删除文件夹 * @param folderPath 文件夹路径 例如:c:/test * @return 如果删除成功,则返回 true;否则返回 false。 */ public static boolean delFolder(String folderPath) { boolean flag = false; try { delAllFile(folderPath); //删除完里面所有内容 String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); flag = myFilePath.delete(); //删除空文件夹 } catch (Exception e) { RecordLog.printLog("删除文件夹,"+folderPath+",出错," +e.getMessage(), RecordLog .LOG_LEVEL_ERROR); e.printStackTrace(); } return flag; } /** * 删除文件夹里面的所有文件 * @param path 文件夹路径 例如:c:/test */ public static void delAllFile(String path) { File file = new File(path); if (!file.exists()) { return; } if (!file.isDirectory()) { return; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i++) { if (path.endsWith(File.separator)) { temp = new File(path + tempList[i]); } else { temp = new File(path + File.separator + tempList[i]); } if (temp.isFile()) { temp.delete(); } if (temp.isDirectory()) { delAllFile(path + "/" + tempList[i]); // 先删除文件夹里面的文件 delFolder(path + "/" + tempList[i]); // 再删除空文件夹 } } } /** * 复制单个文件 * @param oldPath 文件夹路径 例如:c:/test/a.txt * @param newPath 文件夹路径 例如:c:/test/a.txt * @throws IOException */ public static void copyFile(String oldPath, String newPath) throws IOException { int bytesum = 0; int byteread = 0; File oldfile = new File(oldPath); if (oldfile.exists()) { // 文件存在时 InputStream inStream = new FileInputStream(oldPath); // 读入原文件 FileOutputStream fs = new FileOutputStream(newPath); byte[] buffer = new byte[1444]; while ((byteread = inStream.read(buffer)) != -1) { bytesum += byteread; // 字节数 文件大小 System. out.println(bytesum); fs.write(buffer, 0, byteread); } inStream.close(); } } /** * 复制整个文件夹内容 * @param oldPath 文件夹路径 例如:c:/test * @param newPath 文件夹路径 例如:c:/abc */ public static void copyFolder(String oldPath, String newPath) { try { ( new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹 File a = new File(oldPath); String[] file = a.list(); File temp = null; for (int i = 0; i < file.length; i++) { if (oldPath.endsWith(File.separator)) { temp = new File(oldPath + file[i]); } else { temp = new File(oldPath + File.separator + file[i]); } if (temp.isFile()) { FileInputStream input = new FileInputStream(temp); FileOutputStream output = new FileOutputStream(newPath + "/" + (temp.getName()).toString()); byte[] b = new byte[1024 * 5]; int len; while ((len = input.read(b)) != -1) { output.write(b, 0, len); } output.flush(); output.close(); input.close(); } if (temp.isDirectory()) {// 如果是子文件夹 copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]); } } } catch (Exception e) { RecordLog.printLog("复制整个文件夹内容操作出错," +e.getMessage(), RecordLog .LOG_LEVEL_ERROR); e.printStackTrace(); } } /** * 移动文件到指定目录 * @param oldPath 文件夹路径 例如:c:/test/a.txt * @param newPath 文件夹路径 例如:c:/abc/a.txt * @throws IOException */ public static void moveFile(String oldPath, String newPath) throws IOException { copyFile(oldPath, newPath); delFile(oldPath); } /** * 移动文件到指定目录 * @param oldPath String 如:c:/test * @param newPath String 如:d:/abc */ public static void moveFolder(String oldPath, String newPath) { copyFolder(oldPath, newPath); delFolder(oldPath); } public static void main(String[] args){ rename("d:/aaa", "av.xml","ne.xml" ); } public static boolean rename(String filepath,String srcname,String destname){ boolean flag = false; File f = new File(filepath+File.separator+srcname); String c = f.getParent(); File mm = new File(c + File.separator + destname); if (f.renameTo(mm)) flag = true; return flag; } }