java 解压缩 工具类_java中自己常用到的工具类-压缩解压zip文件

packagecom.ricoh.rapp.ezcx.admintoolweb.util;importjava.io.File;importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.FileOutputStream;importjava.io.IOException;importjava.io.InputStream;importjava.io.OutputStream;importjava.nio.charset.Charset;importjava.util.ArrayList;importjava.util.Enumeration;importjava.util.List;importjava.util.zip.ZipEntry;importjava.util.zip.ZipFile;importjava.util.zip.ZipOutputStream;public classZipUtil {private static final int BUFFER_SIZE = 2 * 1024;/***@paramsrcDir

* 需要压缩的文件夹

*@paramzipPath

* 压缩文件目录

*@paramzipFileName

* 压缩文件的名称

*@throwsRuntimeException

*@throwsFileNotFoundException*/

public static voidtoZip(String srcDir, String zipPath, String zipFileName)throwsRuntimeException, FileNotFoundException {long start =System.currentTimeMillis();

File zipDir= newFile(zipPath);if (!zipDir.exists() || !zipDir.isDirectory()) {

zipDir.mkdirs();

}

File zipFile= newFile(zipPath, zipFileName);

FileOutputStream out= newFileOutputStream(zipFile);

ZipOutputStream zos= null;try{

zos= newZipOutputStream(out);

File sourceFile= newFile(srcDir);

compress(sourceFile, zos, sourceFile.getName(),false);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();

}

}if (out != null) {try{

out.close();

}catch(IOException e) {

e.printStackTrace();

}

}

}

}/***@paramsourceFile

* 需要压缩的文件目录

*@paramzos

* zip输出流

*@paramname

* 压缩后的zip名称

*@paramKeepDirStructure

* 是否保留原来的目录结构(false:不保留；true:保留)

*@throwsException*/

private static void compress(File sourceFile, ZipOutputStream zos, String name, booleanKeepDirStructure)throwsException {byte[] buf = new byte[BUFFER_SIZE];if(sourceFile.isFile()) {

zos.putNextEntry(newZipEntry(name));intlen;

FileInputStream in= newFileInputStream(sourceFile);while ((len = in.read(buf)) != -1) {

zos.write(buf,0, len);

}

zos.closeEntry();

in.close();

}else{

File[] listFiles=sourceFile.listFiles();if (listFiles == null || listFiles.length == 0) {

zos.putNextEntry(new ZipEntry(name + "/"));

zos.closeEntry();

}else{for(File file : listFiles) {if(KeepDirStructure) {

compress(file, zos, name+ "/" + file.getName(), true);

}else{

compress(file, zos, file.getName(),true);

}

}

}

}

}/*** 压缩成ZIP 方法2

*

*@paramsrcFiles

* 需要压缩的文件列表

*@paramout

* 压缩文件输出流

*@throwsRuntimeException

**/

public static void toZip(File[] files, String zipPath, String zipFileName) throwsRuntimeException {long start =System.currentTimeMillis();

ZipOutputStream zos= null;

FileOutputStream out= null;try{

File zipDir= newFile(zipPath);if (!zipDir.exists() || !zipDir.isDirectory()) {

zipDir.mkdirs();

}

File zipFile= newFile(zipPath, zipFileName);

out= newFileOutputStream(zipFile);

zos= newZipOutputStream(out);for(File srcFile : files) {byte[] buf = new byte[BUFFER_SIZE];

zos.putNextEntry(newZipEntry(srcFile.getName()));intlen;

FileInputStream in= newFileInputStream(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();

}

}if (out != null) {try{

out.close();

}catch(IOException e) {

e.printStackTrace();

}

}

}

}/*** 解压文件到指定目录*/@SuppressWarnings("rawtypes")public static voidunZipFiles(String zipPath, String descDir) {

File zipFile= newFile(zipPath);

File pathFile= newFile(descDir);if (!pathFile.exists()) {

pathFile.mkdirs();

}//解决zip文件中有中文目录或者中文文件

ZipFile zip = null;try{

zip= new ZipFile(zipFile, Charset.forName("GBK"));for (Enumeration entries =zip.entries(); entries.hasMoreElements();) {//输出文件路径信息

FileOutputStream out = null;

InputStream in= null;try{

ZipEntry entry=(ZipEntry) entries.nextElement();

String zipEntryName=entry.getName();

in=zip.getInputStream(entry);

String outPath= descDir + File.separator +zipEntryName;//判断路径是否存在,不存在则创建文件路径//File file = new File(outPath.substring(0, outPath.lastIndexOf("/")));

File file = new File(outPath.substring(0, outPath.lastIndexOf(File.separator)));if (!file.exists()) {

file.mkdirs();

}//判断文件全路径是否为文件夹,如果是上面已经上传,不需要解压

if (newFile(outPath).isDirectory()) {continue;

}

out= newFileOutputStream(outPath);byte[] buf1 = new byte[1024];intlen;while ((len = in.read(buf1)) > 0) {

out.write(buf1,0, len);

}

}catch(Exception e) {

e.printStackTrace();

}finally{if (out != null) {try{

out.close();

}catch(IOException e) {

e.printStackTrace();

}

}if (in != null) {try{

in.close();

}catch(IOException e) {

e.printStackTrace();

}

}

}

}

}catch(IOException e1) {

e1.printStackTrace();

}finally{if (zip != null) {try{

zip.close();

}catch(IOException e) {

e.printStackTrace();

}

}

}

}/*** 测试*/

public static void main(String[] args) throwsFileNotFoundException {/** String sourFile = "D:/testzip"; String zipPath = "D:/wl"; String zipFileName

* = "tow.zip"; ZipUtil.toZip(sourFile, zipPath, zipFileName);*/

/** File sfile = new File(sourFile); List fileList = new ArrayList<>();

* for(File f : sfile.listFiles()) { fileList.add(f); } toZip(sfile.listFiles(),

* zipPath, zipFileName);*/String zipPath1= "d:/testunzip/user.zip";

String zipPath2= "D:/testunzip/photos.zip";

String descDir1= "d:/testunzip/";

String descDir2= "d:/testunzip/ps";

unZipFiles(zipPath2, descDir2);

}

}