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