java来实现zip压缩文件或者文件夹

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");
}
}