Java 文件操作工具类，java操作工具类,文件及其文件夹的复制，删

Java 文件操作工具类，java操作工具类,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```java

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 &amp;&amp; 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 &amp;&amp; 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 &amp;&amp; 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;}

}

```