三个主要的类：
- import java.util.zip.ZipFile;//打开zip格式文件。
- import java.util.zip.ZipEntry; //标记被压缩文件的属性，主要是文件名和路径。
- import java.util.zip.ZipOutputStream;//zip格式输出流。
压缩文件夹时，需要挨个节点，递归压缩文件夹中所有的文件。
代码如下：
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| public static void zipFile(String filePath, String zipPath) {
try {
File inFile = new File(filePath);
File outFile = new File(zipPath);
FileOutputStream fos = new FileOutputStream(outFile);
ZipOutputStream zos = new ZipOutputStream(fos);
zipFile(filePath, inFile, zos);
zos.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void zipFolder(String folderPath, String zipPath) {
try {
File inFile = new File(folderPath);
File outFile = new File(zipPath);
FileOutputStream fos = new FileOutputStream(outFile);
ZipOutputStream zos = new ZipOutputStream(fos);
zipFile(folderPath, inFile, zos);
zos.close();
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private static void zipFile(String folderPath, File file, ZipOutputStream zos) {
int index = folderPath.lastIndexOf(File.separator);
try {
if (file.isDirectory()) {
File[] files = file.listFiles();
if (files != null) {
for (File f : files)
zipFile(folderPath, f, zos);
}
return;
}
zos.putNextEntry(new ZipEntry(file.getAbsolutePath().substring(index)));
byte[] buffer = new byte[1024];
int length = -1;
FileInputStream fis = new FileInputStream(file);
while ((length = fis.read(buffer)) != -1) {
zos.write(buffer, 0, length);
}
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void unzipFile(String zipFilePath, String outFolderPath) {
try {
ZipFile zipFile = new ZipFile(zipFilePath);
Enumeration<ZipEntry> zList = (Enumeration<ZipEntry>) zipFile.entries();
while (zList.hasMoreElements()) {
ZipEntry zipEntry = zList.nextElement();
if (zipEntry.getName().startsWith("__MACOSX"))
continue;
if (!zipEntry.isDirectory()) {
InputStream is = zipFile.getInputStream(zipEntry);
StringBuffer name = new StringBuffer(outFolderPath);
if (name.lastIndexOf(File.separator) != name.length() - 1) {
name.append(File.separator);
}
name.append(zipEntry.getName());
File outFile = new File(name.toString());
if (!outFile.getParentFile().exists())
outFile.getParentFile().mkdirs();
outFile.createNewFile();
FileOutputStream fos = new FileOutputStream(outFile);
int length = -1;
byte[] buffer = new byte[1024];
while ((length = is.read(buffer)) != -1) {
fos.write(buffer, 0, length);
}
is.close();
fos.close();
}
}
zipFile.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
|
