用java实现zip压缩

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：

packagenet.szh.zip;

importjava.io.BufferedInputStream;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.util.zip.CRC32;
importjava.util.zip.CheckedOutputStream;

importorg.apache.tools.zip.ZipEntry;
importorg.apache.tools.zip.ZipOutputStream;

publicclassZipCompressor{
staticfinalintBUFFER=8192;

privateFilezipFile;

publicZipCompressor(StringpathName){
zipFile=newFile(pathName);
}

publicvoidcompress(StringsrcPathName){
Filefile=newFile(srcPathName);
if(!file.exists())
thrownewRuntimeException(srcPathName+"不存在！");
try{
FileOutputStreamfileOutputStream=newFileOutputStream(zipFile);
CheckedOutputStreamcos=newCheckedOutputStream(fileOutputStream,
newCRC32());
ZipOutputStreamout=newZipOutputStream(cos);
Stringbasedir="";
compress(file,out,basedir);
out.close();
}catch(Exceptione){
thrownewRuntimeException(e);
}
}

privatevoidcompress(Filefile,ZipOutputStreamout,Stringbasedir){
/*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*/
privatevoidcompressDirectory(Filedir,ZipOutputStreamout,Stringbasedir){
if(!dir.exists())
return;

File[]files=dir.listFiles();
for(inti=0;i<files.length;i++){
/*递归*/
compress(files[i],out,basedir+dir.getName()+"/");
}
}

/**压缩一个文件*/
privatevoidcompressFile(Filefile,ZipOutputStreamout,Stringbasedir){
if(!file.exists()){
return;
}
try{
BufferedInputStreambis=newBufferedInputStream(
newFileInputStream(file));
ZipEntryentry=newZipEntry(basedir+file.getName());
out.putNextEntry(entry);
intcount;
bytedata[]=newbyte[BUFFER];
while((count=bis.read(data,0,BUFFER))!=-1){
out.write(data,0,count);
}
bis.close();
}catch(Exceptione){
thrownewRuntimeException(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。

packagenet.szh.zip;

importjava.io.File;

importorg.apache.tools.ant.Project;
importorg.apache.tools.ant.taskdefs.Zip;
importorg.apache.tools.ant.types.FileSet;

publicclassZipCompressorByAnt{

privateFilezipFile;

publicZipCompressorByAnt(StringpathName){
zipFile=newFile(pathName);
}

publicvoidcompress(StringsrcPathName){
Filesrcdir=newFile(srcPathName);
if(!srcdir.exists())
thrownewRuntimeException(srcPathName+"不存在！");

Projectprj=newProject();
Zipzip=newZip();
zip.setProject(prj);
zip.setDestFile(zipFile);
FileSetfileSet=newFileSet();
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 (把test目录 压缩成szhzip.zip)

packagenet.szh.zip;

publicclassTestZip{
publicstaticvoidmain(String[]args){
ZipCompressorzc=newZipCompressor("E:\\szhzip.zip");
zc.compress("E:\\test");

ZipCompressorByAntzca=newZipCompressorByAnt("E:\\szhzipant.zip");
zca.compress("E:\\test");
}
}

转自:http://szhnet.iteye.com/blog/199059