代码：
public class ZipUtil {
/**
* 压缩文件/文件夹
*
*/
public static void compress(String srcFilePath, String destFilePath) {
File src = new File(srcFilePath);
if (!src.exists()) {
throw new RuntimeException(srcFilePath + "不存在");
}
File zipFile = new File(destFilePath);
try {
FileOutputStream fos = new FileOutputStream(zipFile);
CheckedOutputStream cos = new CheckedOutputStream(fos, new CRC32());
ZipOutputStream zos = new ZipOutputStream(cos);
String baseDir = "";
compressbyType(src, zos, baseDir);
zos.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void compressbyType(File src, ZipOutputStream zos, String baseDir) {
if (!src.exists())
return;
System.out.println("压缩" + baseDir + src.getName());
if (src.isFile()) {
compressFile(src, zos, baseDir);
} else if (src.isDirectory()) {
compressDir(src, zos, baseDir);
}
}
/**
* 压缩文件
*/
private static void compressFile(File file, ZipOutputStream zos, String baseDir) {
if (!file.exists())
return;
try {
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
ZipEntry entry = new ZipEntry(baseDir + file.getName());
zos.putNextEntry(entry);
int count;
byte[] buf = new byte[8019];
while ((count = bis.read(buf)) != -1) {
zos.write(buf, 0, count);
}
bis.close();
} catch (Exception e) {
// TODO: handle exception
}
}
/**
* 压缩文件夹
*
*/
private static void compressDir(File dir, ZipOutputStream zos, String baseDir) {
if (!dir.exists())
return;
File[] files = dir.listFiles();
if(files.length == 0){
try {
zos.putNextEntry(new ZipEntry(baseDir + dir.getName() + File.separator));
} catch (IOException e) {
e.printStackTrace();
}
}
for (File file : files) {
compressbyType(file, zos, baseDir + dir.getName() + File.separator);
}
}
/**
* 解压文件/文件夹
*/
public static void decompress(String srcPath, String dest) throws Exception {
File file = new File(srcPath);
if (!file.exists()) {
throw new RuntimeException(srcPath + "所指文件不存在");
}
ZipFile zf = new ZipFile(file);
Enumeration entries = zf.entries();
ZipEntry entry = null;
while (entries.hasMoreElements()) {
entry = (ZipEntry) entries.nextElement();
System.out.println("解压" + entry.getName());
if (entry.isDirectory()) {
String dirPath = dest + File.separator + entry.getName();
File dir = new File(dirPath);
dir.mkdirs();
} else {
// 表示文件
File f = new File(dest + File.separator + entry.getName());
if (!f.exists()) {
//String dirs = FileUtils.getParentPath(f);
String dirs = f.getParent();
File parentDir = new File(dirs);
parentDir.mkdirs();
}
f.createNewFile();
// 将压缩文件内容写入到这个文件中
InputStream is = zf.getInputStream(entry);
FileOutputStream fos = new FileOutputStream(f);
int count;
byte[] buf = new byte[8192];
while ((count = is.read(buf)) != -1) {
fos.write(buf, 0, count);
}
is.close();
fos.close();
}
}
}
public static void main(String[] args) throws Exception {
// compress("/Users/liyinlong/lyl/test","/Users/liyinlong/lyl/test.zip");
decompress("/Users/liyinlong/lyl/test.zip", "/Users/liyinlong/lyl/test");
}
}以上是Java怎么压缩和解压zip文件的详细内容。更多信息请关注PHP中文网其他相关文章！
