一个简单问题，给分！

Question

指定位置???一定要分析你的文件内容才能找到指定位置吧？应该就是字符创操作的问题了。    public void HandleFileStream( String OpenPathFileName，String SavePathFileName ) {
        String readline = "";
        try{
            RandomAccessFile openfile = new RandomAccessFile( this.OpenPathFileName,"r" );
            File file = new File( this.SavePathFileName + "temp" );
            System.out.println("保存アドレス" + this.SavePathFileName );
            RandomAccessFile savefile = new RandomAccessFile( file,"rw" );            readline = openfile.readLine();
            while( true ) {
                if( readline != null ) {
                    System.out.println( readline );
                    if( readline != null ) {
                        savefile.writeBytes( this.StringHandle( readline ) );
                        savefile.writeBytes("\n");
                    }
                    readline = openfile.readLine();
                } else {
                    savefile.close();
                    openfile.close();
                break;
                }
            }
            File filesource = new File( this.SavePathFileName );
            if( filesource.exists() == true ) {
                filesource.delete();
            }
            file.renameTo( new File( this.SavePathFileName ) );
        }catch( FileNotFoundException ee ) {
            System.out.println(ee.getMessage());
        }catch( IOException e ) {
            System.out.println(e.getMessage());
        }
    }    public String StringHandle( String str ) {
        String ret = "";
        int head = -1;
        int end;
        boolean flg = false;
        String handledstringfrist = "";
        String handledstringtwo = "";
        if( str != null ) {
            for( int i = 0;i < this.handletype.length;i++ ) {
                end = this.handletype[i].length();
                head = str.indexOf( this.handletype[i] );
                System.out.println( "head=>" + head );
                if( end > 0 ) {
                    if( head != -1 ) {
                        flg = true;
                        handledstringfrist = str.substring( 0,head );
                        handledstringtwo = str.substring( head + end,str.length() );
                        //handledstring = str.substring( head, head + end );
                        System.out.println( "head前=>" + handledstringfrist + handledstringtwo );
                        ret = handledstringfrist + handledstringtwo + this.handletype[i];
                        System.out.println( "head後=>" + ret );
                        break;
                    }
                }
            }
        }
        if( flg == false )
            ret = str;        return ret;
    }

Answer 1

我已前写的一个，是替换指定目录下（包括子目录）的所有.html文件里面的指定字符串，你看看修改一下对你有没有用。
import java.io.*;
import java.util.*;public class FileControl extends Object {    public FileControl() {
    }    public static void getChildrenAndReplace(String directory){
        try{
            File theFile = new File(directory);
            String[] files = theFile.list();
            String fileName;
            for(int i=0;i<files.length;i++){
                fileName = files[i];
                File child = new File(directory+"/"+fileName);
                if(child.isDirectory()){
                    if(!child.isHidden()) getChildrenAndReplace(directory+"/"+files[i]);
                }
                else if(!child.isHidden()&&fileName.toUpperCase().indexOf(".HTM")>=0) replaceString(child,"gb_2312-80","iso-8859-1");
            }
        }catch(Exception e){e.printStackTrace(System.out);}
    }    public static void replaceString(File file,String newStr,String oldStr){
        RandomAccessFile theFile = null;
        try{
            theFile = new RandomAccessFile(file,"rw");
            String content = theFile.readLine();
            int pointer = content.indexOf(oldStr);
            StringBuffer theBuffer = new StringBuffer(content);
            int initIndex = 0;
            StringBuffer newContent = null;
            while(true){
                if(pointer!=-2) pointer = content.toUpperCase().indexOf(oldStr.toUpperCase());
                if(pointer>=0){
                    theBuffer.replace(pointer,pointer+oldStr.length(),newStr);
                    pointer=-2;
                }
                content = theFile.readLine();
                if(newContent==null) newContent = theBuffer;
                else newContent.append("\n"+theBuffer.toString());
                if(content!=null) theBuffer = new StringBuffer(content);
                else break;
            }
            int length=Integer.parseInt(""+file.length());
            DataOutputStream dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file),length));
            dos.writeBytes(newContent.toString());
            dos.flush();
            System.out.println("over file:"+file.getPath());
        }catch(Exception e){e.printStackTrace(System.out);}
        finally{
            try{
                theFile.close();
            }catch(Exception e){e.printStackTrace(System.out);}
        }
    }