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package com.github.sylphlike.framework.utils.general;

import com.github.sylphlike.framework.utils.UtilException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
 * 

time 10/09/2020 18:19 星期四 (dd/MM/YYYY HH:mm) *

email [email protected] * * @author Gopal.pan * @version 1.0.0 */ public class ZipUtil { private static final Logger LOGGER = LoggerFactory.getLogger(ZipUtil.class); /** * 压缩指定目录下的文件 *

time 17:54 2021/1/4 (HH:mm yyyy/MM/dd) *

email [email protected] * @param originDir 需要压缩的文件ja * @param zipFile 压缩后的文件 * @return boolean * @author Gopal.pan */ public static boolean zip(String originDir,String zipFile) { boolean flag = true; try { if(!zipFile.endsWith(".zip")){ flag = false; LOGGER.info("【framework-utils】文件压缩,压缩文件保存名称不合法 文件名[{}]",zipFile); }else { validateFiles(new File(zipFile),new File(originDir)); OutputStream out = new FileOutputStream(zipFile); toZip(originDir,out,false); } } catch (FileNotFoundException e) { LOGGER.error("【framework】文件压缩,系统异常",e); flag = false; } return flag; } private static final int BUFFER_SIZE = 2 * 1024; /** * 压缩成ZIP 方法1 *

time 17:55 2021/1/4 (HH:mm yyyy/MM/dd) *

email [email protected] * @param srcDir 压缩文件夹路径 * @param out 压缩文件输出流 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) * @throws RuntimeException ex * @author Gopal.pan */ public static void toZip(String srcDir, OutputStream out, boolean KeepDirStructure) throws RuntimeException{ ZipOutputStream zos = null ; try { zos = new ZipOutputStream(out); File sourceFile = new File(srcDir); compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure); } catch (Exception e) { throw new RuntimeException("zip error from ZipUtils",e); }finally{ if(zos != null){ try { zos.close(); } catch (IOException e) { e.printStackTrace(); } } if (out != null ) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * 压缩成ZIP 方法2 *

time 17:56 2021/1/4 (HH:mm yyyy/MM/dd) *

email [email protected] * @param srcFiles 需要压缩的文件列表 * @param out 压缩文件输出流 * @throws RuntimeException ex * @author Gopal.pan */ public static void toZip(List srcFiles , OutputStream out)throws RuntimeException { ZipOutputStream zos = null ; try { zos = new ZipOutputStream(out); for (File srcFile : srcFiles) { byte[] buf = new byte[BUFFER_SIZE]; zos.putNextEntry(new ZipEntry(srcFile.getName())); int len; FileInputStream in = new FileInputStream(srcFile); while ((len = in.read(buf)) != -1){ zos.write(buf, 0, len); } zos.closeEntry(); in.close(); } } catch (Exception e) { throw new RuntimeException("zip error from ZipUtils",e); }finally{ if(zos != null){ try { zos.close(); } catch (IOException e) { e.printStackTrace(); } } } } /** * *

time 17:56 2021/1/4 (HH:mm yyyy/MM/dd) *

email [email protected] * @param sourceFile 源文件 * @param zos zip输出流 * @param name 压缩后的名称 * @param KeepDirStructure 是否保留原来的目录结构,true:保留目录结构; false:所有文件跑到压缩包根目录下(注意:不保留目录结构可能会出现同名文件,会压缩失败) * @throws Exception ex * @author Gopal.pan */ private static void compress(File sourceFile, ZipOutputStream zos, String name, boolean KeepDirStructure) throws Exception{ byte[] buf = new byte[BUFFER_SIZE]; if(sourceFile.isFile()){ // 向zip输出流中添加一个zip实体,构造器中name为zip实体的文件的名字 zos.putNextEntry(new ZipEntry(name)); // copy文件到zip输出流中 int len; FileInputStream in = new FileInputStream(sourceFile); while ((len = in.read(buf)) != -1){ zos.write(buf, 0, len); } // Complete the entry zos.closeEntry(); in.close(); } else { File[] listFiles = sourceFile.listFiles(); if(listFiles == null || listFiles.length == 0){ // 需要保留原来的文件结构时,需要对空文件夹进行处理 if(KeepDirStructure){ // 空文件夹的处理 zos.putNextEntry(new ZipEntry(name + "/")); // 没有文件,不需要文件的copy zos.closeEntry(); } }else { for (File file : listFiles) { // 判断是否需要保留原来的文件结构 if (KeepDirStructure) { // 注意:file.getName()前面需要带上父文件夹的名字加一斜杠, // 不然最后压缩包中就不能保留原来的文件结构,即:所有文件都跑到压缩包根目录下了 compress(file, zos, name + "/" + file.getName(),KeepDirStructure); } else { compress(file, zos, file.getName(),KeepDirStructure); } } } } } /** * 判断压缩文件保存的路径是否为源文件路径的子文件夹,如果是,则抛出异常(防止无限递归压缩的发生) *

time 17:57 2021/1/4 (HH:mm yyyy/MM/dd) *

email [email protected] * @param zipFile 压缩后的产生的文件路径 * @param originFile 被压缩的文件或目录 * @throws UtilException ex * @author Gopal.pan */ private static void validateFiles(File zipFile, File... originFile) throws UtilException { if (zipFile.isDirectory()) { throw new UtilException("Zip file ["+ zipFile.getAbsoluteFile()+"] must not be a directory !"); } for (File srcFile : originFile) { if (null == srcFile) { continue; } if (!srcFile.exists()) { throw new UtilException("File ["+srcFile.getAbsolutePath()+"] not exist!"); } try { final File parentFile = zipFile.getCanonicalFile().getParentFile(); // 压缩文件不能位于被压缩的目录内 if (srcFile.isDirectory() && parentFile.getCanonicalPath().contains(srcFile.getCanonicalPath())) { throw new UtilException("Zip file path ["+zipFile.getCanonicalPath()+"] must not be the child directory of ["+ srcFile.getCanonicalPath()+"] !"); } } catch (IOException e) { throw new UtilException(e); } } } }





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