import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import org.apache.log4j.Logger;public class FileUtils {    /**     * 读取一个文件夹下所有文件的绝对路径。忽略此文件夹下的问价夹     *      * @param absFolderPath     *            文件夹绝对路径     * @return List
     
           */    public static List
      
        readFilePath(String absFolderPath) {        List
       
         paths = new ArrayList
        
         ();        File file = new File(absFolderPath);        // 文件夹        if (file.isDirectory()) {            for (File childFile : file.listFiles()) {                // 不是文件夹并且没有被操作                if (!childFile.isDirectory()) {                    // 路径通过"/"手动创建，避免因window下出现反斜杠\ 路径的情况                    paths.add(absFolderPath + "/" + childFile.getName());                }            }        }        return paths;    }    /**     * 通过文件的绝对路径删除文件,如果传入是文件夹路径，忽略并返回false     *      * @param absFilePath     *            文件绝对路径     * @return boolean     */    public static boolean deleteFile(String absFilePath) {        boolean result = false;        File file = new File(absFilePath);        if (!file.isDirectory()) {            file.delete();            result = true;        }        return result;    }    /**     * 删除问价夹下所有文件     *      * @param absFolderPath     * @return boolean     */    public static boolean deleteAllFileInTheFolder(String absFolderPath) {        boolean result = true;        for (String filePath : FileDealUtil.readFilePath(absFolderPath)) {            result = result && FileDealUtil.deleteFile(filePath);        }        return result;    }    /**     * 将文件移动到指定问价夹下     *      * @param filePath     *            文件路径     * @param folderPath     *            文件夹路径     * @return String 移动后文件路径,filePath为文件夹或folderPath为文件或文件正在被其他进程打开无法移动返回null     */    public static String moveFile(String filePath, String folderPath) {        String path = null;        File file = new File(filePath);        if (file.isDirectory())            return path;        File folder = new File(folderPath);        if (!folder.exists()) {            folder.mkdirs();        }        if (!folder.isDirectory())            return path;        File nowFile = new File(folderPath + "/" + file.getName());        if (nowFile.exists())            nowFile.delete();        if (file.renameTo(new File(folder, file.getName())))            path = folderPath + "/" + file.getName();        return path;    }    /**     * 得到文件输入流     *      * @param path     *            绝对路径     * @return InputStream     */    public static InputStream getFile(String path) {        // First try to read from the file system ...        File file = new File(path);        if (file.exists() && file.canRead()) {            try {                return new FileInputStream(file);            } catch (FileNotFoundException e) {                // continue                return null;            }        }        return null;    }    /**     * 判断文件夹是否存在 void     *      */    public static boolean existFolder(String folderPath) {        File file = new File(folderPath);        return file.exists();    }    /**     * 创建文件夹     *      * @param folderPath     *            void     */    public static void creatFolder(String folderPath) {        if (!existFolder(folderPath)) {            File file = new File(folderPath);            file.mkdirs();        }    }    /**     * 获取文件大小 如果文件存在并且不是目录，返回文件大小，如果文件不存在或者是目录，返回0     *      * @return Long 单位bytes     */    public static Long getFileSize(String filePath) {        File file = new File(filePath);        if (file.exists() && !file.isDirectory()) {            return file.length();        } else {            return 0L;        }    }    /**     * 从文件路径中分离出文件名     *      * @param filePath     * @return String     */    public static String splitFileName(String filePath) {        return filePath.substring(filePath.lastIndexOf("/") + 1);    }    /**     *      * @param filePath     * @param inputStream     * @return boolean     */    public static boolean writeFile(String filePath, InputStream inputStream) {        OutputStream outputStream = null;        try {            outputStream = new FileOutputStream(filePath);            int bytesRead = 0;            byte[] buffer = new byte[2048];            while ((bytesRead = inputStream.read(buffer, 0, 2048)) != -1) {                outputStream.write(buffer, 0, bytesRead);            }            return true;        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();            return false;        } finally {            try {                outputStream.close();                inputStream.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}