使用zip4j压缩和解压
maven项目增加依赖：
<dependency>
<groupId>net.lingala.zip4j</groupId>
<artifactId>zip4j</artifactId>
<version>1.3.2</version>
</dependency>
压缩解压工具类：
package com.explorer.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import net.lingala.zip4j.core.ZipFile;
import net.lingala.zip4j.exception.ZipException;
import net.lingala.zip4j.model.FileHeader;
import net.lingala.zip4j.model.ZipParameters;
import net.lingala.zip4j.util.Zip4jConstants;
import java.io.*;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
/**
* <p>zip 工具类</p>
*
* <p>依赖：zip4j</p>
*
*/
public class ZipUtil {
private static final Logger logger = LoggerFactory.getLogger(ZipUtil.class);
private static String getEncoding( String path ) throws Exception{
String encoding = "GBK" ;
ZipFile zipFile = new ZipFile( path ) ;
zipFile.setFileNameCharset( encoding ) ;
List<FileHeader> list = zipFile.getFileHeaders() ;
for( int i = 0; i < list.size(); i++ ){
FileHeader fileHeader = list.get( i ) ;
String fileName = fileHeader.getFileName();
if( isMessyCode( fileName ) ){
encoding = "UTF-8" ;
break ;
}
}
return encoding ;
}
private static boolean isMessyCode( String str ){
for( int i = 0; i < str.length(); i++ ){
char c = str.charAt( i ) ;
// 当从Unicode编码向某个字符集转换时，如果在该字符集中没有对应的编码，则得到0x3f（即问号字符?）
// 从其他字符集向Unicode编码转换时，如果这个二进制数在该字符集中没有标识任何的字符，则得到的结果是0xfffd
if( (int)c == 0xfffd ){
// 存在乱码
return true ;
}
}
return false ;
}
public static void zip(List<File> fileList, String dest, String passwd) {
//创建目标文件
ZipParameters par = new ZipParameters();
par.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
par.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
if (passwd != null) {
par.setEncryptFiles(true);
par.setEncryptionMethod(Zip4jConstants.ENC_METHOD_STANDARD);
par.setPassword(passwd.toCharArray());
}
ZipFile zipfile = null;
try {
zipfile = new ZipFile(dest);
for (File file : fileList) {
if (file.isDirectory()){
zipfile.addFolder(file, par);
}
else{
zipfile.addFile(file, par);
}
}
} catch (ZipException e) {
e.printStackTrace();
}
}
public static void unZip( String zipPath, String destDir ) throws Exception {
ZipFile zipFile = new ZipFile( zipPath ) ;
zipFile.setFileNameCharset( getEncoding( zipPath ) ) ;
zipFile.extractAll( destDir ) ;
}
public static void main(String[] args) throws Exception {
try {
List<File> list = new ArrayList<File>();
list.add(new File("D:\\logs\\log"));
list.add(new File("D:\\logs\\测试移动"));
list.add(new File("D:\\logs\\文件上传（支持拖动上传）.zip"));
zip(list, "D:\\logs\\aa.zip", null);
//unZip("D:\\logs\\文件上传（支持拖动上传）.zip", "D:\\logs/文件上传（支持拖动上传）");
} catch (Exception e) {
e.printStackTrace();
}
}
}
//以下是另一个压缩解压的工具类：
package com.explorer.utils;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.utils.IOUtils;
import org.apache.commons.io.FileUtils;
/**
* 压缩（解压）文件工具类
* @author Administrator
*
*/
public class CompressUtils {
private static final int BUFFER_SIZE = 2 * 1024;
/**
* 压缩成ZIP 方法1
* @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 压缩失败会抛出运行时异常 String srcDir
*/
public static void toZip(List<File> fileList, OutputStream out, boolean KeepDirStructure) throws RuntimeException{
long start = System.currentTimeMillis();
System.out.println("开始压缩...");
ZipOutputStream zos = null ;
try {
zos = new ZipOutputStream(out);
//File sourceFile = new File(srcDir);
//compress(sourceFile,zos,sourceFile.getName(),KeepDirStructure);
compress(fileList,zos,"",KeepDirStructure);
long end = System.currentTimeMillis();
System.out.println("压缩完成，耗时：" + (end - start) +" ms");
} catch (Exception e) {
throw new RuntimeException("zip error from ZipUtils",e);
}finally{
if(zos != null){
try {
zos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 压缩成ZIP 方法2
* @param srcFiles 需要压缩的文件列表
* @param out 压缩文件输出流
* @throws RuntimeException 压缩失败会抛出运行时异常
*/
public static void toZip(List<File> srcFiles , OutputStream out)throws RuntimeException {
long start = System.currentTimeMillis();
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();
}
long end = System.currentTimeMillis();
System.out.println("压缩完成，耗时：" + (end - start) +" ms");
} catch (Exception e) {
throw new RuntimeException("zip error from ZipUtils",e);
}finally{
if(zos != null){
try {
zos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/** 递归压缩方法
* @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
*/
private static void compress(List<File> fileList,ZipOutputStream zos, String name,
boolean KeepDirStructure) throws Exception {
byte[] buf = new byte[BUFFER_SIZE];
for (File file : fileList) {
compress(file,zos,file.getName(),KeepDirStructure);
}
}
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);
}
}
}
}
}
/**
* 解压zip文件(输入源zip路径，输出源zip路径)
*/
public static void unzip(String zipDir, String descDir) {
File zipFile = new File(zipDir);
try (ZipArchiveInputStream inputStream = getZipFile(zipFile)) {
File pathFile = new File(descDir);
if (!pathFile.exists()) {
pathFile.mkdirs();
}
ZipArchiveEntry entry = null;
while ((entry = inputStream.getNextZipEntry()) != null) {
if (entry.isDirectory()) {
File directory = new File(descDir, entry.getName());
directory.mkdirs();
} else {
OutputStream os = null;
try {
os = new BufferedOutputStream(new FileOutputStream(new File(descDir, entry.getName())));
//输出文件路径信息
System.out.println("解压文件的当前路径为:" + descDir + entry.getName());
IOUtils.copy(inputStream, os);
} finally {
IOUtils.closeQuietly(os);
}
}
}
final File[] files = pathFile.listFiles();
if (files != null && files.length == 1 && files[0].isDirectory()) {
// 说明只有一个文件夹
FileUtils.copyDirectory(files[0], pathFile);
//免得删除错误， 删除的文件必须在/data/demand/目录下。
boolean isValid = files[0].getPath().contains("/data/www/");
if (isValid) {
FileUtils.forceDelete(files[0]);
}
}
System.out.println("******************解压完毕********************");
} catch (Exception e) {
e.printStackTrace();
}
}
private static ZipArchiveInputStream getZipFile(File zipFile) throws Exception {
return new ZipArchiveInputStream(new BufferedInputStream(new FileInputStream(zipFile)));
}
/**
* @param args
*/
static final int BUFFER = 2048;
public static void unzip(String filename) {
long startTime=System.currentTimeMillis();
System.out.println("开始解压...");
try{
int index1=filename.lastIndexOf(".");
String zipName=filename.substring(0,index1);
ZipFile zipFile = new ZipFile(filename);
Enumeration enu = zipFile.entries();
new File(zipName).mkdirs();
while(enu.hasMoreElements()){
ZipEntry zipEntry = (ZipEntry)enu.nextElement();
if(zipEntry.isDirectory()){
new File(zipName+"/"+zipEntry.getName()).mkdirs();
continue;
}
BufferedInputStream bis = new BufferedInputStream(zipFile.getInputStream(zipEntry));
File file = new File(zipName+"/"+zipEntry.getName());
File parent = file.getParentFile();
if(parent != null && !parent.exists()){
parent.mkdirs();
}
FileOutputStream fos = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(fos,BUFFER);
byte[] array = new byte[BUFFER];
while((bis.read(array, 0, BUFFER))!=-1){
bos.write(array, 0, BUFFER);
}
bos.flush();
bos.close();
bis.close();
}
}catch(Exception e){
e.printStackTrace();
}
System.out.println("解压成功！");
long endTime=System.currentTimeMillis();
System.out.println("耗费时间： "+(endTime-startTime)+" ms");
}
public static void main(String[] args) throws Exception {
/** 测试压缩方法1 */
//FileOutputStream fos1 = new FileOutputStream(new File("D:/mytest01.zip"));
//CompressUtils.toZip("D:/网站html模板", fos1,true);
/** 测试压缩方法2 */
List<File> fileList = new ArrayList<>();
fileList.add(new File("D:/网站html模板"));
fileList.add(new File("D:/eclipse导入豆沙绿配置.txt"));
fileList.add(new File("D:/eclipse豆沙绿配置.epf"));
//FileOutputStream fos2 = new FileOutputStream(new File("D:/mytest02.zip"));
//CompressUtils.toZip(fileList, fos2,true);
unzip("D:/SSR4.0扶墙1121.zip","D:/SSR4.0扶墙1121");
}
}
