java FileUtils 文件工具类

package com.sicdt.library.core.utils;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
 *
 * <br>类 名: FileUtils
 * <br>描 述: 描述类完成的主要功能
 * <br>作 者: shizhenwei
 * <br>创 建: 2017年5月15日
 * <br>版 本: v0.0.2
 * <br>
 * <br>历 史: (版本) 作者 时间 注释
 */
public class FileUtils {

    private Logger log = LoggerFactory.getLogger(FileUtils.class);

    private File file;

    public FileUtils(File file) {
        this.file = file;
    }

    public FileUtils(String pathname) {
        this(new File(pathname));
    }

    public static FileUtils create(String pathname) {
        return new FileUtils(pathname);
    }

    public static FileUtils create(File file) {
        return new FileUtils(file);
    }

    /**
     * 获取不带扩展名的文件名
     * @return
     */
    public String getNameWithOutSuffix() {
        String name = file.getName();
        if(!file.isFile()) return name;
        int flag = name.lastIndexOf(".");
        if(flag != -1){
            return name.substring(0, flag);
        }
        return name;
    }

    /**
     * 获取文件扩展名
     * @return
     */
    public String getSuffix(){
        if(!file.isFile()) return "";
        String name = file.getName();
        int flag = name.lastIndexOf(".");
        if(flag != -1){
            return name.substring(flag + 1).toLowerCase();
        }
        return "";
    }

    /**
     * 获取当前文件所在文件夹路径
     * @return
     */
    public String getFolderPath() {
        File parent = file.getParentFile();
        if(parent == null || !parent.exists()){
            return File.separator;
        }
        return parent.getAbsolutePath();
    }

    /**
     * 将文件复制到
     * @param pathname 文件夹名称
     * @return
     */
    public File copyTo(String pathname) {
        File targetFile = new File(pathname);
        if(file.isDirectory()){
            if(!targetFile.exists() || !targetFile.isDirectory()){
                targetFile.mkdirs();
            }
            log.info("Copy folder to: " + pathname);
            File[] childFiles = file.listFiles();
            if(childFiles != null && childFiles.length > 0){
                for(File childFile: childFiles){
                    String targetpath = targetFile.getAbsolutePath() + File.separator + childFile.getName();
                    FileUtils childUtils = FileUtils.create(childFile);
                    childUtils.copyTo(targetpath);
                }
            }
        }else{
            try(InputStream input = new FileInputStream(file);
                    OutputStream output = new FileOutputStream(targetFile);){
                IOUtils.copy(input, output);
                log.info("Copy file to: " + pathname);
            }catch(IOException e){
                e.printStackTrace();
                return null;
            }
        }
        return targetFile;
    }

    public boolean exist() {
        return file.exists();
    }

    /**
     * 压缩至文件夹
     * @param foldername
     * @return
     */
    public File zipTo(String foldername, String zipname) {
        if(StringUtils.isEmpty(zipname)){
            zipname = getNameWithOutSuffix() + ".zip";
        }
        File targetFolder = new File(foldername);
        if(!targetFolder.exists() || !targetFolder.isDirectory()){
            targetFolder.mkdirs();
        }
        File targetFile = new File(targetFolder.getAbsolutePath() + File.separator + zipname);
        try(FileOutputStream output = new FileOutputStream(targetFile);
                CheckedOutputStream cos = new CheckedOutputStream(output, new CRC32());
                ZipOutputStream zipout = new ZipOutputStream(cos);){
            compress(file, zipout, "");
            return targetFile;
        }catch(Exception e){
            log.error("文件压缩失败：" + targetFile.getAbsolutePath());
            return null;
        }
    }

    private void compress(File zipfile, ZipOutputStream out, String basedir) {
        if(zipfile.isDirectory()){
            File[] files = zipfile.listFiles();
            for(File childFile: files){
                compress(childFile, out, basedir + zipfile.getName() + "/");
            }
        }else{
            try(BufferedInputStream bis = new BufferedInputStream(new FileInputStream(zipfile));){
                ZipEntry entry = new ZipEntry(basedir + zipfile.getName());
                out.putNextEntry(entry);
                IOUtils.copy(bis, out);
            }catch(Exception e){
                log.error("压缩失败：" + zipfile.getAbsolutePath() + ": " + e.getMessage(), e);
            }
        }
    }

    public void delete(){
        delete(file);
    }

    private boolean delete(File file) {
        if (file.isDirectory()) {
            String[] children = file.list();
            for (int i=0; i<children.length; i++) {
                boolean success = delete(new File(file, children[i]));
                if (!success) {
                    return false;
                }
            }
        }
        return file.delete();
    }

    /**
     * 获取文件MD5
     * @return
     */
    public String md5() {
        return MD5Utils.getFileMD5String(file);
    }
}