使用java基礎類寫的一個簡單的zip壓縮解壓工具類
代碼如下：
package sun.net.helper;
import java.io.*;
import java.util.logging.Logger;
import java.util.zip.*;
public class ZipUtil {
private final static Logger logger = Logger.getLogger(ZipUtil.class.getName());
private static final int BUFFER = 1024*10;
/**
* 將指定目錄壓縮到和該目錄同名的zip文件，自定義壓縮路徑
* @param sourceFilePath 目標文件路徑
* @param zipFilePath 指定zip文件路徑
* @return
*/
public static boolean zip(String sourceFilePath,String zipFilePath){
boolean result=false;
File source=new File(sourceFilePath);
if(!source.exists()){
logger.info(sourceFilePath+" doesn't exist.");
return result;
}
if(!source.isDirectory()){
logger.info(sourceFilePath+" is not a directory.");
return result;
}
File zipFile=new File(zipFilePath+"/"+source.getName()+".zip");
if(zipFile.exists()){
logger.info(zipFile.getName()+" is already exist.");
return result;
}else{
if(!zipFile.getParentFile().exists()){
if(!zipFile.getParentFile().mkdirs()){
logger.info("cann't create file "+zipFile.getName());
return result;
}
}
}
logger.info("creating zip file...");
FileOutputStream dest=null;
ZipOutputStream out =null;
try {
dest = new FileOutputStream(zipFile);
CheckedOutputStream checksum = new CheckedOutputStream(dest, new Adler32());
out=new ZipOutputStream(new BufferedOutputStream(checksum));
out.setMethod(ZipOutputStream.DEFLATED);
compress(source,out,source.getName());
result=true;
} catch (FileNotFoundException e) {
e.printStackTrace();
}finally {
if (out != null) {
try {
out.closeEntry();
} catch (IOException e) {
e.printStackTrace();
}
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
if(result){
logger.info("done.");
}else{
logger.info("fail.");
}
return result;
}
private static void compress(File file,ZipOutputStream out,String mainFileName) {
if(file.isFile()){
FileInputStream fi= null;
BufferedInputStream origin=null;
try {
fi = new FileInputStream(file);
origin=new BufferedInputStream(fi, BUFFER);
int index=file.getAbsolutePath().indexOf(mainFileName);
String entryName=file.getAbsolutePath().substring(index);
System.out.println(entryName);
ZipEntry entry = new ZipEntry(entryName);
out.putNextEntry(entry);
byte[] data = new byte[BUFFER];
int count;
while((count = origin.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (origin != null) {
try {
origin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}else if (file.isDirectory()){
File[] fs=file.listFiles();
if(fs!=null&&fs.length>0){
for(File f:fs){
compress(f,out,mainFileName);
}
}
}
}
/**
* 將zip文件解壓到指定的目錄，該zip文件必須是使用該類的zip方法壓縮的文件
* @param zipFile
* @param destPath
* @return
*/
public static boolean unzip(File zipFile,String destPath){
boolean result=false;
if(!zipFile.exists()){
logger.info(zipFile.getName()+" doesn't exist.");
return result;
}
File target=new File(destPath);
if(!target.exists()){
if(!target.mkdirs()){
logger.info("cann't create file "+target.getName());
return result;
}
}
String mainFileName=zipFile.getName().replace(".zip","");
File targetFile=new File(destPath+"/"+mainFileName);
if(targetFile.exists()){
logger.info(targetFile.getName()+" already exist.");
return result;
}
ZipInputStream zis =null;
logger.info("start unzip file ...");
try {
FileInputStream fis= new FileInputStream(zipFile);
CheckedInputStream checksum = new CheckedInputStream(fis, new Adler32());
zis = new ZipInputStream(new BufferedInputStream(checksum));
ZipEntry entry;
while((entry = zis.getNextEntry()) != null) {
int count;
byte data[] = new byte[BUFFER];
String entryName=entry.getName();
int index=entryName.indexOf(mainFileName);
String newEntryName=destPath+"/"+entryName.substring(index);
System.out.println(newEntryName);
File temp=new File(newEntryName).getParentFile();
if(!temp.exists()){
if(!temp.mkdirs()){
throw new RuntimeException("create file "+temp.getName() +" fail");
}
}
FileOutputStream fos = new FileOutputStream(newEntryName);
BufferedOutputStream dest = new BufferedOutputStream(fos,BUFFER);
while ((count = zis.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, count);
}
dest.flush();
dest.close();
}
result=true;
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (zis != null) {
try {
zis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
if(result){
logger.info("done.");
}else{
logger.info("fail.");
}
return result;
}
public static void main(String[] args) throws IOException {
//ZipUtil.zip("D:/apache-tomcat-7.0.30", "d:/temp");
File zipFile=new File("D:/temp/apache-tomcat-7.0.30.zip");
ZipUtil.unzip(zipFile,"d:/temp") ;
}
}
另一個壓縮解壓示例，二個工具大家參考使用吧
代碼如下：
package com.lanp;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
/**
* 解壓ZIP壓縮文件到指定的目錄
*/
public final class ZipToFile {
/**
* 緩存區大小默認20480
*/
private final static int FILE_BUFFER_SIZE = 20480;
private ZipToFile() {
}
/**
* 將指定目錄的ZIP壓縮文件解壓到指定的目錄
* @param zipFilePath ZIP壓縮文件的路徑
* @param zipFileName ZIP壓縮文件名字
* @param targetFileDir ZIP壓縮文件要解壓到的目錄
* @return flag 布爾返回值
*/
public static boolean unzip(String zipFilePath, String zipFileName, String targetFileDir){
boolean flag = false;
//1.判斷壓縮文件是否存在，以及裡面的內容是否為空
File file = null; //壓縮文件(帶路徑)
ZipFile zipFile = null;
file = new File(zipFilePath + "/" + zipFileName);
System.out.println(">>>>>>解壓文件【" + zipFilePath + "/" + zipFileName + "】到【" + targetFileDir + "】目錄下<<<<<<");
if(false == file.exists()) {
System.out.println(">>>>>>壓縮文件【" + zipFilePath + "/" + zipFileName + "】不存在<<<<<<");
return false;
} else if(0 == file.length()) {
System.out.println(">>>>>>壓縮文件【" + zipFilePath + "/" + zipFileName + "】大小為0不需要解壓<<<<<<");
return false;
} else {
//2.開始解壓ZIP壓縮文件的處理
byte[] buf = new byte[FILE_BUFFER_SIZE];
int readSize = -1;
ZipInputStream zis = null;
FileOutputStream fos = null;
try {
// 檢查是否是zip文件
zipFile = new ZipFile(file);
zipFile.close();
// 判斷目標目錄是否存在，不存在則創建
File newdir = new File(targetFileDir);
if (false == newdir.exists()) {
newdir.mkdirs();
newdir = null;
}
zis = new ZipInputStream(new FileInputStream(file));
ZipEntry zipEntry = zis.getNextEntry();
// 開始對壓縮包內文件進行處理
while (null != zipEntry) {
String zipEntryName = zipEntry.getName().replace('\\', '/');
//判斷zipEntry是否為目錄，如果是，則創建
if(zipEntry.isDirectory()) {
int indexNumber = zipEntryName.lastIndexOf('/');
File entryDirs = new File(targetFileDir + "/" + zipEntryName.substring(0, indexNumber));
entryDirs.mkdirs();
entryDirs = null;
} else {
try {
fos = new FileOutputStream(targetFileDir + "/" + zipEntryName);
while ((readSize = zis.read(buf, 0, FILE_BUFFER_SIZE)) != -1) {
fos.write(buf, 0, readSize);
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e.getCause());
} finally {
try {
if (null != fos) {
fos.close();
}
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e.getCause());
}
}
}
zipEntry = zis.getNextEntry();
}
flag = true;
} catch (ZipException e) {
e.printStackTrace();
throw new RuntimeException(e.getCause());
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e.getCause());
} finally {
try {
if (null != zis) {
zis.close();
}
if (null != fos) {
fos.close();
}
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e.getCause());
}
}
}
return flag;
}
/**
* 測試用的Main方法
*/
public static void main(String[] args) {
String zipFilePath = "C:\\home";
String zipFileName = "lp20120301.zip";
String targetFileDir = "C:\\home\\lp20120301";
boolean flag = ZipToFile.unzip(zipFilePath, zipFileName, targetFileDir);
if(flag) {
System.out.println(">>>>>>解壓成功<<<<<<");
} else {
System.out.println(">>>>>>解壓失敗<<<<<<");
}
}
}
