java实现zip压缩文件 (一)

网上查了许久，最后发现三种不错的方法：

1、jdk自带的包java.util.zip.ZipOutputStream，不足之处，文件（夹）名称带中文时，

出现乱码问题，实现代码如下：

/**

* 功能：把 sourceDir 目录下的所有文件进行 zip 格式的压缩，保存为指定 zip 文件

* @param sourceDir 如果是目录，eg：D:\\MyEclipse\\first\\testFile，则压缩目录下所有文件；

* 如果是文件，eg：D:\\MyEclipse\\first\\testFile\\aa.zip，则只压缩本文件

* @param zipFile 最后压缩的文件路径和名称,eg:D:\\MyEclipse\\first\\testFile\\aa.zip

*/

public File doZip(String sourceDir, String zipFilePath)

throws IOException {

File file = new File(sourceDir);

File zipFile = new File(zipFilePath);

ZipOutputStream zos = null;

try {

// 创建写出流操作

OutputStream os = new FileOutputStream(zipFile);

BufferedOutputStream bos = new BufferedOutputStream(os);

zos = new ZipOutputStream(bos);

String basePath = null;

// 获取目录

if(file.isDirectory()) {

basePath = file.getPath();

}else {

basePath = file.getParent();

}

zipFile(file, basePath, zos);

}finally {

if(zos != null) {

zos.closeEntry();

zos.close();

}

}

return zipFile;

}

/**

* @param source 源文件

* @param basePath

* @param zos

*/

private void zipFile(File source, String basePath, ZipOutputStream zos)

throws IOException {

File[] files = null;

if (source.isDirectory()) {

files = source.listFiles();

} else {

files = new File[1];

files[0] = source;

}

InputStream is = null;

String pathName;

byte[] buf = new byte[1024];

int length = 0;

try{

for(File file : files) {

if(file.isDirectory()) {

pathName = file.getPath().substring(basePath.length() + 1) + "/";

zos.putNextEntry(new ZipEntry(pathName));

zipFile(file, basePath, zos);

}else {

pathName = file.getPath().substring(basePath.length() + 1);

is = new FileInputStream(file);

BufferedInputStream bis = new BufferedInputStream(is);

zos.putNextEntry(new ZipEntry(pathName));

while ((length = bis.read(buf)) > 0) {

zos.write(buf, 0, length);

}

}

}

}finally {

if(is != null) {

is.close();

}

}

}

2、使用org.apache.tools.zip.ZipOutputStream，代码如下，

Java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) {
/* 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);
}
}
}

3、可以用ant中的org.apache.tools.ant.taskdefs.Zip来实现，更加简单。

Java代码

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

Java代码

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");
}
}