利用java将文件或文件夹压缩成zip格式
- import java.io.BufferedInputStream;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.util.zip.CRC32;
- import java.util.zip.CheckedOutputStream;
- import java.util.zip.ZipEntry;
- import java.util.zip.ZipOutputStream;
- public class IOTest {
- static final int BUFFER = 8192;
- private File zipFile;
- public IOTest(String pathName) {
- zipFile = new File(pathName);
- }
- public void compress(String srcPathName) {
- File file = new File(srcPathName);
- if (!file.exists())
- throw new RuntimeException(srcPathName + "不存在!");
- try {
- FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
- CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
- new CRC32());
- ZipOutputStream out = new ZipOutputStream(cos);
- String basedir = "";
- compress(file, out, basedir);
- out.close();
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
- private void compress(File file, ZipOutputStream out, String basedir) {
- /* 判断是目录还是文件 */
- if (file.isDirectory()) {
- System.out.println("压缩:" + basedir + file.getName());
- this.compressDirectory(file, out, basedir);
- } else {
- System.out.println("压缩:" + basedir + file.getName());
- this.compressFile(file, out, basedir);
- }
- }
- /** 压缩一个目录 */
- private void compressDirectory(File dir, ZipOutputStream out, String basedir) {
- if (!dir.exists())
- return;
- File[] files = dir.listFiles();
- for (int i = 0; i < files.length; i++) {
- /* 递归 */
- compress(files[i], out, basedir + dir.getName() + "/");
- }
- }
- /** 压缩一个文件 */
- private void compressFile(File file, ZipOutputStream out, String basedir) {
- if (!file.exists()) {
- return;
- }
- try {
- BufferedInputStream bis = new BufferedInputStream(
- new FileInputStream(file));
- ZipEntry entry = new ZipEntry(basedir + file.getName());
- out.putNextEntry(entry);
- int count;
- byte data[] = new byte[BUFFER];
- while ((count = bis.read(data, 0, BUFFER)) != -1) {
- out.write(data, 0, count);
- }
- bis.close();
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
- /**测试是否可以压缩*/
- public static void main(String[] args) {
- IOTest zc = new IOTest("E:/javazip.zip");
- zc.compress("E:/test");
- System.out.println("OK....");
- }
- }