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);
- }
- }
- }
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) {
/* 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);
}
}
}
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();
- }
- }
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);
//fileSet.setIncludes("**/*.java"); 包括哪些文件或文件夹 eg:zip.setIncludes("*.java");
//fileSet.setExcludes(...); 排除哪些文件或文件夹
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");
- }
- }
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");
}
}