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android zip解压缩(含有子目录)

2013-12-02 11:54 295 查看
note: 如果目录中含有中文名称, 要用substr = new String(substr.getBytes("8859_1"), "GB2312");这样的语句转换,否则为乱码:

/**
* 解压缩功能.
* 将ZIP_FILENAME文件解压到ZIP_DIR目录下.
* @throws Exception
*/
public int upZipFile(File zipFile, String folderPath)throws ZipException,IOException {
//public static void upZipFile() throws Exception{
ZipFile zfile=new ZipFile(zipFile);
Enumeration zList=zfile.entries();
ZipEntry ze=null;
byte[] buf=new byte[1024];
while(zList.hasMoreElements()){
ze=(ZipEntry)zList.nextElement();
if(ze.isDirectory()){
Log.d("upZipFile", "ze.getName() = "+ze.getName());
String dirstr = folderPath + ze.getName();
//dirstr.trim();
dirstr = new String(dirstr.getBytes("8859_1"), "GB2312");
Log.d("upZipFile", "str = "+dirstr);
File f=new File(dirstr);
f.mkdir();
continue;
}
Log.d("upZipFile", "ze.getName() = "+ze.getName());
OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(folderPath, ze.getName())));
InputStream is=new BufferedInputStream(zfile.getInputStream(ze));
int readLen=0;
while ((readLen=is.read(buf, 0, 1024))!=-1) {
os.write(buf, 0, readLen);
}
is.close();
os.close();
}
zfile.close();
return 0;
}

/**
* 给定根目录,返回一个相对路径所对应的实际文件名.
* @param baseDir 指定根目录
* @param absFileName 相对路径名,来自于ZipEntry中的name
* @return java.io.File 实际的文件
*/
public static File getRealFileName(String baseDir, String absFileName){
String[] dirs=absFileName.split("/");
File ret=new File(baseDir);
String substr = null;
if(dirs.length>1){
for (int i = 0; i < dirs.length-1;i++) {
substr = dirs[i];
try {
//substr.trim();
substr = new String(substr.getBytes("8859_1"), "GB2312");

} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
ret=new File(ret, substr);

}
Log.d("upZipFile", "1ret = "+ret);
if(!ret.exists())
ret.mkdirs();
substr = dirs[dirs.length-1];
try {
//substr.trim();
substr = new String(substr.getBytes("8859_1"), "GB2312");
Log.d("upZipFile", "substr = "+substr);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

ret=new File(ret, substr);
Log.d("upZipFile", "2ret = "+ret);
return ret;
}

return ret;
}

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