本来是写到spaces live上的,可是代码的显示效果确实不怎么好看。在javaeye上试了试代码显示的顺眼多了。
今天写了个用java压缩的功能,可以实现对文件和目录的压缩。
由于java.util.zip.ZipOutputStream有中文乱码问题,所以采用org.apache.tools.zip.ZipOutputStream。
以下是代码:
- package net.szh.zip;
-
- 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 org.apache.tools.zip.ZipEntry;
- import org.apache.tools.zip.ZipOutputStream;
-
- public class ZipCompressor {
- static final int BUFFER = 8192;
-
- private File zipFile;
-
- public ZipCompressor(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) {
-
- 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);
- }
- }
-
-
- 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++) {
-
- compress(files[i], out, basedir + dir.getName() + "/");
- }
- }
-
-
- 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);
- }
- }
- }
后来发现原来可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现,更加简单。
- package net.szh.zip;
-
- import java.io.File;
-
- import org.apache.tools.ant.Project;
- import org.apache.tools.ant.taskdefs.Zip;
- import org.apache.tools.ant.types.FileSet;
-
- public class ZipCompressorByAnt {
-
- private File zipFile;
-
- public ZipCompressorByAnt(String pathName) {
- zipFile = new File(pathName);
- }
-
- public void compress(String srcPathName) {
- File srcdir = new File(srcPathName);
- if (!srcdir.exists())
- throw new RuntimeException(srcPathName + "不存在!");
-
- Project prj = new Project();
- Zip zip = new Zip();
- zip.setProject(prj);
- zip.setDestFile(zipFile);
- FileSet fileSet = new FileSet();
- fileSet.setProject(prj);
- fileSet.setDir(srcdir);
-
-
- zip.addFileset(fileSet);
-
- zip.execute();
- }
- }
测试一下
- package net.szh.zip;
-
- public class TestZip {
- public static void main(String[] args) {
- ZipCompressor zc = new ZipCompressor("E:\\szhzip.zip");
- zc.compress("E:\\test");
-
- ZipCompressorByAnt zca = new ZipCompressorByAnt("E:\\szhzipant.zip");
- zca.compress("E:\\test");
- }
- }