使用zip对文件或文件夹进行压缩, 解压缩

使用zip对文件或文件夹进行压缩, 解压缩

Java代码







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.ZipInputStream;

import java.util.zip.ZipOutputStream;

/**

* 对文件或文件夹进行压缩和解压

*

*/

public
class ZipUtil {

/**得到当前系统的分隔符*/

// private static String separator = System.getProperty("file.separator");

/**

* 添加到压缩文件中

* @param out

* @param f

* @param base

* @throws Exception

*/

private
void directoryZip(ZipOutputStream out, File f, String base)
throws Exception {

// 如果传入的是目录

if (f.isDirectory()) {

File[] fl = f.listFiles();
// 创建压缩的子目录

out.putNextEntry(new ZipEntry(base +
"/"));

if (base.length() ==
0) {
base = "";

} else {

base = base + "/";

}
for (int i =
0; i < fl.length; i++) {
directoryZip(out, fl[i], base + fl[i].getName());

}
} else {

// 把压缩文件加入rar中

out.putNextEntry(new ZipEntry(base));

FileInputStream in = new FileInputStream(f);

byte[] bb =
new
byte[10240];

int aa =
0;
while ((aa = in.read(bb)) != -1) {

out.write(bb, 0, aa);

}
in.close();
}
}

/**

* 压缩文件

*
* @param zos

* @param file

* @throws Exception

*/

private
void fileZip(ZipOutputStream zos, File file)
throws Exception {

if (file.isFile()) {

zos.putNextEntry(new ZipEntry(file.getName()));

FileInputStream fis = new FileInputStream(file);

byte[] bb =
new
byte[10240];

int aa =
0;
while ((aa = fis.read(bb)) != -1) {

zos.write(bb, 0, aa);

}
fis.close();
System.out.println(file.getName());
} else {

directoryZip(zos, file, "");

}
}

/**

* 解压缩文件

*
* @param zis

* @param file

* @throws Exception

*/

private
void fileUnZip(ZipInputStream zis, File file)
throws Exception {

ZipEntry zip = zis.getNextEntry();
if (zip ==
null)

return;

String name = zip.getName();
File f = new File(file.getAbsolutePath() +
"/" + name);

if (zip.isDirectory()) {

f.mkdirs();
fileUnZip(zis, file);
} else {

f.createNewFile();
FileOutputStream fos = new FileOutputStream(f);

byte b[] =
new
byte[10240];

int aa =
0;
while ((aa = zis.read(b)) != -1) {

fos.write(b, 0, aa);

}
fos.close();
fileUnZip(zis, file);
}
}

/**

* 根据filePath创建相应的目录

* @param filePath

* @return

* @throws IOException

*/

private File mkdirFiles(String filePath)
throws IOException{

File file = new File(filePath);

if(!file.getParentFile().exists()){

file.getParentFile().mkdirs();
}
file.createNewFile();

return file;

}

/**

* 对zipBeforeFile目录下的文件压缩，保存为指定的文件zipAfterFile

*
* @param zipBeforeFile 压缩之前的文件

* @param zipAfterFile 压缩之后的文件

*/

public
void zip(String zipBeforeFile, String zipAfterFile) {

try {

ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(mkdirFiles(zipAfterFile)));

fileZip(zos, new File(zipBeforeFile));

zos.close();
} catch (Exception e) {

e.printStackTrace();
}
}

/**

* 解压缩文件unZipBeforeFile保存在unZipAfterFile目录下

*
* @param unZipBeforeFile 解压之前的文件

* @param unZipAfterFile 解压之后的文件

*/

public
void unZip(String unZipBeforeFile, String unZipAfterFile) {

try {

ZipInputStream zis = new ZipInputStream(new FileInputStream(unZipBeforeFile));

File f = new File(unZipAfterFile);

f.mkdirs();
fileUnZip(zis, f);
zis.close();
} catch (Exception e) {

e.printStackTrace();
}
}
}