用java解压缩rar文件 de.innosystec.unrar解压缩rar文件

用java解压缩rar文件

2009-10-23 14:11

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<FileHeader> 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<filebytes.length;endflg++,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; }