java压缩文件方法讨论

有三种方式实现java压缩：

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，
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。
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"); 

} 

}