这是利用de.innosystec.unrar解压缩rar文件.(他不支持中文和日文.下面是经本人改进后支持双字节的.同时实现了跨平台)

/**

* unRar method, extract rar file

*

* @param file_src Archive File

* @param extractPath extract Path

* @return boolean

* @exception Exception

*/

private static boolean unRar(File file_src,String extractPath) {

String os = System.getProperty(Const.getString(propertyOS)).toLowerCase();

File extractToFolder = new File(extractPath);

ReadOnlyAccessFile readOnlyAccessFile=null;

Archive archive=null;

try {

readOnlyAccessFile = new ReadOnlyAccessFile(

file_src);

archive = new Archive(readOnlyAccessFile);

final List fileHeaders = archive.getFileHeaders();

int actualaSize = 0;

for (FileHeader fileHeader : fileHeaders){

//String fileNameString=fileHeader.getFileName();//这是英文情况

//如果是象日文和中文那样的双字节字.get filenamebyte and remove error code

byte[] filebytes=fileHeader.getFileNameByteArray();

int endflg=0;

for(int i=0;i

if(filebytes[i]==0){

break;

}

}

//get filename

String fileNameString=new String(filebytes,0,endflg,"SJIS");    //这是日语编码.如果是中文系统就换成相应的编码.

if(os!=null && !os.startsWith("windows")){//linux,repalce "\" to "/"

fileNameString=fileNameString.replace("\\", System.getProperty("file.separator", null));

}

File unpackedFile = new File(extractToFolder, fileNameString);

File parentFolder = unpackedFile.getParentFile();

//create the parents tree

parentFolder.mkdirs();

if(Integer.toHexString(fileHeader.getUnpMethod()).equals("30")

& (Integer.toHexString(fileHeader.getUnpVersion()).equals("14"))){

actualaSize++;

}else{

FileOutputStream out=null;

try {

out = new FileOutputStream(unpackedFile);

archive.extractFile(fileHeader,out );

actualaSize++;

} catch (FileNotFoundException e) {

unpackedFile.delete();

parentFolder.delete();

}finally{

out.close();

}

}

}

} catch (Exception e) {

extractToFolder.delete();

return false;

}finally{

try {

readOnlyAccessFile.close();

} catch (Exception e1) {

;

}

}

return true;

}