Java 文件操作，java文件操作,文件及其文件夹的复制，删

Java 文件操作，java文件操作,文件及其文件夹的复制，删

文件及其文件夹的复制，删除，拷贝等操作类

package util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FilenameFilter;public class FileUtil {    private final static String FILE_SUFFIX = ".java.drl";    private final static String FILE_TEMP = "C:/temp/";    /**     * 将已存在的drl文件删除     *      * @param ObjectPath     */    public static void deleteExistedDRLFile(String ObjectPath) {        File filePath = new File(ObjectPath);        if (!filePath.exists()) {            System.out.println("目录不存在!");        } else {            if (filePath.isDirectory()) {                File[] list = filePath.listFiles(new FilenameFilter() {                    public boolean accept(File dir, String name) {                        return name.endsWith(FILE_SUFFIX);                    }                });                for (int i = 0; i < list.length; i++) {                    list[i].delete();                }            }        }    }    /**     * 创建文件夹,如果有则不创建     *      * @param ObjectPath     */    public static boolean creareDirectory(String ObjectPath) {        boolean flag = true;        File filePath = new File(ObjectPath);        if (!filePath.exists()) {            filePath.mkdir();            flag = false;        }        return flag;    }    /**     * 查看某文件夹下面是否有文件,有文件则创建一个temp文件夹,将文件拷贝到temp目录下(备份文件) 没有文件怎什么都不做     * 备份后，把原文件夹里文件删除     *      * @param ObjectPath     */    public static void backupFile(String ObjectPath, String dirName) {        String backupPath;        if (!FILE_TEMP.endsWith(File.separator)) {            backupPath = FILE_TEMP + File.separator + dirName;        } else {            backupPath = FILE_TEMP + dirName;        }        File backupFilePath = new File(backupPath);        if (!backupFilePath.exists()) {            backupFilePath.mkdirs();        }        File filePath = new File(ObjectPath);        if (!filePath.exists()) {            System.out.println("目录不存在!");        } else {            if (filePath.isDirectory()) {                File[] list = filePath.listFiles();                if (list != null && list.length != 0) {                    copyFolder(ObjectPath, backupPath);// 文件备份                    for (int i = 0; i < list.length; i++) {                        list[i].delete();                    }                }            }        }    }    /**     * 复原文件，把文件从备份文件夹拷贝到原来文件夹     *      * @param ObjectPath     * @param dirName     */    public static void recoverFile(String ObjectPath, String dirName) {        String backupPath;        if (ObjectPath.endsWith(File.separator)) {            ObjectPath = new StringBuffer(ObjectPath).append(dirName)                    .toString();        } else {            ObjectPath = new StringBuffer(ObjectPath)                    .append(File.separatorChar).append(dirName).toString();        }        if (!FILE_TEMP.endsWith(File.separator)) {            backupPath = FILE_TEMP + File.separator + dirName;        } else {            backupPath = FILE_TEMP + dirName;        }        File backupFilePath = new File(backupPath);        if (!backupFilePath.exists()) {            backupFilePath.mkdirs();        }        File filePath = new File(ObjectPath);        if (!filePath.exists()) {            System.out.println("目录不存在!");        } else {            if (filePath.isDirectory()) {                File[] list = filePath.listFiles();                if (list != null && list.length != 0) {                    copyFolder(backupPath, ObjectPath);// 文件复原                }            }        }    }    /**     * 复制整个文件夹内容     *      * @param oldPath     *            String 原文件路径 如：c:/fqf     * @param newPath     *            String 复制后路径 如：f:/fqf/ff     * @return boolean     */    public static void copyFolder(String oldPath, String newPath) {        try {            (new File(newPath)).mkdir(); // 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) {            System.out.println("复制整个文件夹内容操作出错");            e.printStackTrace();        }    }    /**     * 删除备份文件和存放备份文件的文件夹     *      * @param ObjectPath     */    public static void deleteFileAndDirectory(String dirName) {        String ObjectPath;        if (!FILE_TEMP.endsWith(File.separator)) {            ObjectPath = FILE_TEMP + File.separator + dirName;        } else {            ObjectPath = FILE_TEMP + dirName;        }        File filePath = new File(ObjectPath);        if (!filePath.exists()) {            filePath.mkdirs();            System.out.println("目录不存在!");        } else {            if (filePath.isDirectory()) {                File[] list = filePath.listFiles();                for (int i = 0; i < list.length; i++) {                    list[i].delete();                }            }            filePath.delete();        }    }    /**     * 判断某文件夹下是否存在文件，存在返回true     *      * @param ObjectPath     * @return     */    public static boolean existFileInDirectory(String ObjectPath) {        boolean flag = false;        File filePath = new File(ObjectPath);        if (filePath.exists()) {            if (filePath.isDirectory()) {                File[] list = filePath.listFiles();                if (list != null && list.length != 0) {                    flag = true;                }            }        }        return flag;    }    /**     * 删除某个文件夹     * @param ObjectPath     */    public static void deleteDirectory(String ObjectPath) {        File filePath = new File(ObjectPath);        if (filePath.exists()) {            filePath.delete();        }    }    /**     * 将已存在的文件删除     *      * @param ObjectPath     */    public static boolean deleteExistedFile(String ObjectPath,final String fileName) {        boolean flag =false;        File filePath = new File(ObjectPath);        if (filePath.exists()) {                        if (filePath.isDirectory()) {                File[] list = filePath.listFiles(new FilenameFilter() {                    public boolean accept(File dir, String name) {                        return name.equals(fileName);                    }                });                for (int i = 0; i < list.length; i++) {                    list[i].delete();                }                flag=true;            }        }        return flag;    }}//该片段来自于http://byrx.net