Java压缩或解压文件实现详解编程语言

    在处理压缩文件的时候，其实重点的就是递归的使用，区分压缩的是文件还是文件夹，并如何处理文件夹下的文件和文件夹。下面就直接把代码贴出来

     /**    
[email protected]: 压缩解压文件  
*/    
import java.io.BufferedInputStream;   
import java.io.BufferedOutputStream;   
import java.io.File;   
import java.io.FileInputStream;   
import java.io.FileOutputStream;   
import java.util.Enumeration;   
import java.util.zip.ZipEntry;   
import java.util.zip.ZipException;   
import java.util.zip.ZipFile;   
import java.util.zip.ZipOutputStream;   
public class Zip {   
private static int BUFFERSIZE = 32;//缓冲流大小   
private static FileOutputStream fileOutputStream = null;   
private static ZipOutputStream zipOutputStream = null;   
private static byte[] array = new byte[BUFFERSIZE];   
/**  
* @param outputDir  
* @param outputFileName  
* @throws Exception  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:打开流  
*/   
private static void openZipOutputStream(String outputDir, String outputFileName) throws Exception{   
fileOutputStream = new FileOutputStream(outputDir + "//" + outputFileName);   
zipOutputStream = new ZipOutputStream(new BufferedOutputStream(fileOutputStream));   
}   
/**  
* @throws Exception  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:关闭流  
*/   
private static void closeZipOutputStream() throws Exception{   
zipOutputStream.close();   
fileOutputStream.close();   
}   
/**  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:缓存清空  
*/   
private static void clearArrayBuffer(){   
array = null;   
array = new byte[BUFFERSIZE];   
}   
/**  
* @param inputFile  
* @param zipOutputStream  
* @param base  
* @param isPrint  
* @throws Exception  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:压缩文件  
*/   
private static void inputFileStream(File inputFile, ZipOutputStream zipOutputStream, String base,  boolean isPrint) throws Exception{   
BufferedInputStream bufferedInputStream = null;   
FileInputStream fileInputStream = new FileInputStream(inputFile);     
bufferedInputStream = new BufferedInputStream(fileInputStream, BUFFERSIZE);     
base = base.length() == 0 ? "" : base + "/";   
if (isPrint) {   
System.out.println(inputFile + "...");   
}   
ZipEntry zipEntry = new ZipEntry(base + inputFile.getName());   
zipOutputStream.putNextEntry(zipEntry);   
clearArrayBuffer();   
while((bufferedInputStream.read(array, 0, BUFFERSIZE))!=-1){     
zipOutputStream.write(array, 0, BUFFERSIZE);    
}      
bufferedInputStream.close();   
}   
/**  
* @param inputFile  
* @param zipOutputStream  
* @param base  
* @param isPrint  
* @throws Exception  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:压缩文件夹  
*/   
private static void inputDirectoryStream(File inputFile, ZipOutputStream zipOutputStream, String base,  boolean isPrint) throws Exception {   
File[] files = inputFile.listFiles();   
for (File file : files) {   
if (file.isFile()) {   
//这里实现递归调用   
inputFileStream(file, zipOutputStream, base, isPrint);   
} else {   
String baseN = (base.length() == 0 ? "" : base + "/") + file.getName();   
inputDirectoryStream(file, zipOutputStream, baseN, isPrint);   
}   
}   
}   
/**  
* @param inputDir  
* @param outputDir  
* @param outputFileName  
* @param isPrint  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description:压缩文件OR文件夹  
*/   
private static void zip(String inputDir, String outputDir, String outputFileName, boolean isPrint) {   
try {   
File inputFile = new File(inputDir);   
if (!inputFile.exists()) {   
System.out.println("Not found file " + inputDir);   
return;   
}   
File outputFile = new File(outputDir);   
if (!outputFile.exists()) {   
outputFile.mkdirs();   
}   
openZipOutputStream(outputDir, outputFileName);   
if (inputFile.isDirectory()) {   
inputDirectoryStream(inputFile, zipOutputStream, "", isPrint);   
} else {   
inputFileStream(inputFile, zipOutputStream, "", isPrint);   
}   
closeZipOutputStream();   
} catch (Exception e) {   
e.printStackTrace();   
}   
}   
/**  
* @param inputFileName  
* @param outputDir  
* @param isPrint  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description: 解压文件  
*/   
@SuppressWarnings("rawtypes")   
private static void unZip(String inputFileName, String outputDir, boolean isPrint) {   
try {   
File inputFile = new File(inputFileName);   
if (!inputFile.exists()) {   
System.out.println("Not found file " + inputFileName);   
return;   
}   
File outputFile = new File(outputDir);   
if (!outputFile.exists()) {   
outputFile.mkdirs();   
}   
outputDir = outputDir.endsWith("[/|//]") ? outputDir : outputDir + "/";   
ZipFile zipFile = null;   
try {   
zipFile = new ZipFile(inputFileName);    
} catch (ZipException e) {   
System.out.println("File " + inputFileName + " isn't zip");   
return;   
}   
Enumeration enu = zipFile.entries();     
while(enu.hasMoreElements()){     
ZipEntry zipEntry = (ZipEntry)enu.nextElement();     
if(zipEntry.isDirectory()){     
new File(outputDir+zipEntry.getName()).mkdirs();     
continue;     
}   
BufferedInputStream bufferedInputStream = new BufferedInputStream(zipFile.getInputStream(zipEntry));     
File file = new File(outputDir+zipEntry.getName());    
if (isPrint) {   
System.out.println(file + "...");   
}   
File parent = file.getParentFile();     
if(parent != null && !parent.exists()){     
parent.mkdirs();     
}     
FileOutputStream fileOutputStream = new FileOutputStream(file);     
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream, BUFFERSIZE);     
clearArrayBuffer();    
while((bufferedInputStream.read(array, 0, BUFFERSIZE))!=-1){     
bufferedOutputStream.write(array, 0, BUFFERSIZE);    
}     
bufferedOutputStream.flush();     
bufferedOutputStream.close();   
fileOutputStream.close();   
bufferedInputStream.close();     
}    
} catch (Exception e) {   
e.printStackTrace();   
}   
}   
/**  
* @param fileName  
* @param isZip  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description: 解压OR压缩文件，不显示进度  
*/   
public static void zipOrUnZip(String fileName, boolean isZip) {   
zipOrUnZip(fileName, isZip, false);   
}   
/**  
* @param fileName  
* @param isZip  
* @param isPrint  
* @Date: 2013-8-8    
* @Author: lulei    
* @Description: 解压OR压缩文件，显示进度  
*/   
public static void zipOrUnZip(String fileName, boolean isZip, boolean isPrint) {   
File inputFile = new File(fileName);   
if (!inputFile.exists()) {   
System.out.println("Not found file " + fileName);   
return;   
}   
String outputDir = inputFile.getParent();   
if (isZip) {   
String outputFileName = inputFile.getName() + ".zip";   
zip(fileName, outputDir, outputFileName, isPrint);   
} else {   
int i = inputFile.getName().indexOf(".");   
if (i >= 0) {   
outputDir += inputFile.getName().substring(0, i);   
unZip(fileName, outputDir, isPrint);   
} else {   
System.out.println("File " + fileName + " isn't zip");   
return;   
}   
}   
}   
public static void main(String[] args) {   
// TODO Auto-generated method stub     
Zip.zipOrUnZip("f:/outdoc", true, true);   
Zip.zipOrUnZip("f:/outdoc.zip", false, true);   
}   
}  

最后可以直接调用zipOrUnZip()方法来实现压缩和解压功能即可