?1 package ?zhenyu.tools.file;
 ?2
?3 import ?java.io. * ;
 ?4
?5 import ?java.util. * ;
 ?6 import ?java.util.zip. * ;
 ?7
?8
?9 public ? class ?Unzip? {
 10 ???? public ?Unzip()? {
 11 ????}
12
13 ???? public ? static ? void ?main(String[]?args)? {
 14 ????????Unzip?unzip? = ? new ?Unzip();
 15 ????????unzip.UnzipFile( " D:\\tmp.zip " ,? " e:\\tmp " );
 16 ????}
17
18 ???? public ? static ? final ? void ?copyInputStream(InputStream?in,?OutputStream?out)
 19 ???????? throws ?IOException? {
 20 ???????? byte []?buffer? = ? new ? byte [ 1024 ];
 21 ???????? int ?len;
 22
23 ???????? while ?((len? = ?in.read(buffer))? >= ? 0 )
 24 ????????????out.write(buffer,? 0 ,?len);
 25
26 ????????in.close();
 27 ????????out.close();
 28 ????}
29
30 ???? private ? void ?UnzipFile(String?from,?String?to)? {
 31 ????????Enumeration?entries;
 32 ????????ZipFile?zipFile;
 33
34 ???????? if ?(from? == ? null )? {
 35 ????????????System.err.println( " Usage:?Unzip?zipfile " );
 36
37 ???????????? return ;
 38 ????????}
39
40 ???????? try ? {
 41 ????????????zipFile? = ? new ?ZipFile(from);
 42 ????????????entries? = ?zipFile.entries();
 43
44 ???????????? while ?(entries.hasMoreElements())? {
 45 ????????????????ZipEntry?entry? = ?(ZipEntry)?entries.nextElement();
 46 ????????????????System.out.println(entry.getName());
 47
48 ???????????????? if ?(entry.getName().lastIndexOf( " \\ " )? != ? - 1 )? {
 49
50 ????????????????????System.out.println( " Extracting?directory:? " ? + ?to? +
51 ????????????????????????File.separator? + ?entry.getName());
 52
53 ????????????????????String?txt;
 54 ????????????????????StringTokenizer?st? = ? new ?StringTokenizer(entry.getName(),
 55 ???????????????????????????? " \\ " );
 56 ???????????????????? for ?( int ?i? = ? 0 ;?st.hasMoreTokens() && i < st.countTokens();?i ++ )? {
 57 ????????????????????????txt? = ?st.nextToken().trim();
 58 ???????????????????????? if ?(to.endsWith( " \\ " ))? {
 59 ????????????????????????????File?myFilePath? = ? new ?File(to? + ?txt);
 60
61 ???????????????????????????? if ?( ! myFilePath.exists())? {
 62 ????????????????????????????????myFilePath.mkdir();
 63 ????????????????????????????}
64 ????????????????????????} ? else ? {
 65 ????????????????????????????File?myFilePath? = ? new ?File(to? + ?File.separator? +
66 ????????????????????????????????????txt);
 67
68 ???????????????????????????? if ?( ! myFilePath.exists())? {
 69 ????????????????????????????????myFilePath.mkdir();
 70 ????????????????????????????}
71 ????????????????????????}
72 ????????????????????}
73 ????????????????}
74
75 ????????????????System.out.println( " Extracting?file:? " ? + ?to? + ?File.separator? +
76 ????????????????????entry.getName());
 77 ????????????????System.out.println( " -------------------------------------- " );
 78
79 ????????????????????????????????copyInputStream(zipFile.getInputStream(entry),
 80 ???????????????????????????????????? new ?BufferedOutputStream(
 81 ???????????????????????????????????????? new ?FileOutputStream(to? + ?File.separator? + ?entry.getName())));
 82 ????????????}
83
84 ????????????zipFile.close();
 85 ????????} ? catch ?(IOException?ioe)? {
 86 ????????????System.err.println( " Unhandled?exception: " );
 87 ????????????ioe.printStackTrace();
 88
89 ???????????? return ;
 90 ????????}
91 ????}
92 }
93
壓縮包文件結構：
|-tem
?????? |-folderA
?????????????????? |-filea
????????????????? ?|-fileb
?????????????????? |-filec
?????? |-filed
解壓后文件結構：
|-tem
?????? |-folderA
?????????????????? |-filea
????????????????? ?|-fileb
?????????????????? |-filec
?????? |-filed