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Java编程思想第4版[中文版](PDF格式)-第267章

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      if(!s。startsWith(packMarker))  

        Pr。error(〃Can't find 〃 + packMarker  

          + 〃 in 〃 + s);  

      s = s。substring(  

        packMarker。length())。trim();  

      dirname = s。substring(0; s。indexOf('#'));  

      filename = s。substring(s。indexOf('#') + 1);  

      dirname = dirname。replace(  

        oldsep。charAt(0); filesep。charAt(0));  

      filename = filename。replace(  

        oldsep。charAt(0); filesep。charAt(0));  

      System。out。println(〃l isting: 〃 + dirname   

        + filesep + filename);  

      while((s = pFile。readLine()) != null) {  

        // Watch for end of code listing:  

        if(s。startsWith(endMarker) ||  

           s。startsWith(endMarker2)) {  

          contents += s;  



                                                                                        626 


…………………………………………………………Page 628……………………………………………………………

          break;  

        }  

        contents += s + eol;  

      }  

    } catch(IOException e) {  

      System。err。println(〃Error reading line〃);  

    }  

  }  

  public boolean hasFile() {   

    return filename != null;   

  }  

  public String directory() { return dirname; }  

  public String filename() { return filename; }  

  public String contents() { return contents; }  

  // To write to a packed file:  

  public void writePacked(DataOutputStream out) {  

    try {  

      out。writeBytes(  

        packMarker + dirname + 〃#〃   

        + filename + eol);  

      out。writeBytes(contents);  

    } catch(IOException e) {  

      Pr。error(〃writing 〃 + dirname +   

        filesep + filename);  

    }  

  }  

  // To generate the actual file:  

  public void writeFile(String rootpath) {  

    File path = new File(rootpath; dirname);  

    path。mkdirs();  

    PrintWriter p =  

      IO。psOpen(new File(path; filename));  

    p。print(contents);  

    IO。close(p);  

  }  

}  

  

class DirMap {  

  private Hashtable t = new Hashtable();  

  private String rootpath;  

  DirMap() {  

    rootpath = System。getProperty(〃user。dir〃);  

  }  

  DirMap(String alternateDir) {  

    rootpath = alternateDir;  

  }  

  public void add(SourceCodeFile f){  

    String path = f。directory();  

    if(!t。containsKey(path))  

      t。put(path; new Vector());  

    ((Vector)t。get(path))。addElement(f);  

  }  



                                                                                             627 


…………………………………………………………Page 629……………………………………………………………

  public void writePackedFile(String fname) {  

    DataOutputStream packed = IO。dosOpen(fname);  

    try {  

      packed。writeBytes(〃###Old Separator:〃 +  

        SourceCodeFile。filesep + 〃###n〃);  

    } catch(IOException e) {  

      Pr。error(〃Writing separator to 〃 + fname);  

    }  

    Enumeration e = t。keys();  

    while(e。hasMoreElements()) {  

      String dir = (String)e。nextElement();  

      System。out。println(  

        〃Writing directory 〃 + dir);  

      Vector v = (Vector)t。get(dir);  

      for(int i = 0; i 《 v。size(); i++) {  

        SourceCodeFile f =   

          (SourceCodeFile)v。elementAt(i);  

        f。writePacked(packed);  

      }  

    }  

    IO。close(packed);  

  }  

  // Write all the files in their directories:  

  public void write() {  

    Enumeration e = t。keys();  

    while(e。hasMoreElements()) {  

      String dir = (String)e。nextElement();  

      Vector v = (Vector)t。get(dir);  

      for(int i = 0; i 《 v。size(); i++) {  

        SourceCodeFile f =   

          (SourceCodeFile)v。elementAt(i);  

        f。writeFile(rootpath);  

      }  

      // Add file indicating file quantity  

      // written to this directory as a check:  

      IO。close(IO。dosOpen(  

        new File(new File(rootpath; dir);  

          Integer。toString(v。size())+〃。files〃)));  

    }  

  }  

}  

  

public class CodePackager {  

  private static final String usageString =  

  〃usage: java CodePackager packedFileName〃 +  

  〃nExtracts source code files from packed n〃 +  

  〃version of Tjava。doc sources into 〃 +  

  〃directories off current directory n〃 +  

  〃java CodePackager packedFileName newDirn〃 +  

  〃Extracts into directories off newDirn〃 +  

  〃java CodePackager …p source。txt packedFile〃 +  

  〃nCreates packed version of source files〃 +  



                                                                                             628 


…………………………………………………………Page 630……………………………………………………………

  〃nfrom text version of Tjava。doc〃;  

  private static void usage() {  

    System。err。println(usageString);  

    System。exit(1);  

  }  

  public static void main(String'' args) {  

    if(args。length == 0) usage();  

    if(args'0'。equals(〃…p〃)) {  

      if(args。length != 3)  

        usage();  

      createPackedFile(args);  

    }  

    else {  

      if(args。length 》 2)  

        usage();  

      extractPackedFile(args);  

    }  

  }  

  private static String currentLine;   

  private static BufferedReader in;  

  private static DirMap dm;  

  private static void   

  createPackedFile(String'' args) {  

    dm = new DirMap();  

    in = IO。disOpen(args'1');  

    try {  

      while((currentLine = in。readLine())   

          != null) {  

        if(currentLine。startsWith(  

            SourceCodeFile。startMarker)) {  

          dm。add(new SourceCodeFile(  

                   currentLine; in));  

        }  

        else if(currentLine。startsWith(  

            SourceCodeFile。endMarker))  

          Pr。error(〃file has no start marker〃);  

        // Else ignore the input line  

      }  

    } catch(IOException e) {  

      Pr。error(〃Error reading 〃 + args'1');  

    }  

    IO。close(in);  

    dm。writePackedFile(args'2');  

  }  

  private static void   

  extractPackedFile(
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