File Operator


以下は私が仕事で使ったファイルの操作方法です.
これは、あるパスの下にあるすべての接尾辞名を検索します.txtのファイルは、Stringタイプのパスを転送することもできます.
String path = "/opt/data/sample.txt";
File file = new File(path);
これでもいいです.
// //                ,      txt  
 public static void getAllTXT(File file) {
  //
  if(file.isFile()){
   String fileName = file.getAbsolutePath();
   int len = fileName.length();
   if(fileName.substring(len-4, len).equalsIgnoreCase(".TXT")){
    //      .TXT   ,           
       FilterTXT(fileName);
   }
  }
  if(file.isDirectory()){
   File[] files = file.listFiles();
   for(int i= 0;i<files.length;i++){
    getAllTXT(files[i]);
   }
  }
 }

次のクラスは、ファイルをcopyするプロセスです.
//copy file from oldpath to newPath,first find oldpath isexist or not...
 public static void copyFile(String oldPath, String newPath) {
     try {
       int bytesum = 0;
       int byteread = 0;
       File oldfile = new File(oldPath);
       if (oldfile.exists()) { //     
         InputStream inStream = new FileInputStream(oldPath); //     
         FileOutputStream fs = new FileOutputStream(newPath);
         byte[] buffer = new byte[1444];
         int length;
         while ( (byteread = inStream.read(buffer)) != -1) {
           bytesum += byteread; //        
//           System.out.println(bytesum);
           fs.write(buffer, 0, byteread);
         }
         inStream.close();
       }
     }
     catch (Exception e) {
       System.out.println("          ");
       e.printStackTrace();

     }

   }

具体的なファイル処理内容:
//  txt  
 public static void FilterTXT(String filepath){
  long start=System.currentTimeMillis();

//    ,                        ,                ,            .
     String[] keysmap = new String[]{
       "  ","  ","   ","   ",......
             };
     try {
     File file = new File(filepath);
     new File(file.getParent()+File.separator+"modify").mkdir();
     String newName = new File(file.getParent()+File.separator+"modify")+File.separator+file.getName();
     File file2 = new File(newName);
     if(file.exists()){
      BufferedReader in = null;
      BufferedWriter bw = null;
       in = new BufferedReader(new FileReader(file));
       bw = new BufferedWriter(new FileWriter(file2));
      String str="";
      
      while((str=in.readLine())!=null){
       for(int ii = 0;ii<keysmap.length;ii++){
        if(str.contains(keysmap[ii])){
         //                 ,                
         str = str.replace(keysmap[ii], "");
        }
       }
       bw.write(str+"\r
"); bw.flush(); } long end = System.currentTimeMillis(); System.out.println(filepath+" , "+(end-start)+" "); in.close(); bw.close(); copyFile(newName,filepath); new File(newName).delete(); String foldpath=file.getParent()+File.separator+"modify"; new File(foldpath).delete(); }else{ System.out.println(filepath+" "); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }

これで、私のは書き終わりました.次には私がネット上から収集した操作ファイルの方法があります.著作権は元のものです.だから、ここに明記します.以下のようにリストします.
JAVAファイル操作クラスとフォルダの操作コードの例は、テキストファイルの内容の読み取り、新規ディレクトリ、マルチレベルディレクトリ作成、新規ファイルの作成、エンコード方式のファイル作成、ファイルの削除、フォルダの削除、指定されたフォルダの下のすべてのファイルの削除、単一のファイルのコピー、フォルダ全体の内容のコピー、ファイルの移動、ディレクトリの移動などを含む.とてもいいですよ!
package com.gamvan.tools;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;
public class FileOperate {
    private String message;
    public FileOperate() {
    } 
    /**
     *         
     * @param filePathAndName             
     * @param encoding            
     * @return          
     */
    public String readTxt(String filePathAndName,String encoding) throws IOException{
     encoding = encoding.trim();
     StringBuffer str = new StringBuffer("");
     String st = "";
     try{
      FileInputStream fs = new FileInputStream(filePathAndName);
      InputStreamReader isr;
      if(encoding.equals("")){
       isr = new InputStreamReader(fs);
      }else{
       isr = new InputStreamReader(fs,encoding);
      }
      BufferedReader br = new BufferedReader(isr);
      try{
       String data = "";
       while((data = br.readLine())!=null){
         str.append(data+" "); 
       }
      }catch(Exception e){
       str.append(e.toString());
      }
      st = str.toString();
     }catch(IOException es){
      st = "";
     }
     return st;     
    }

    /**
     *     
     * @param folderPath   
     * @return           
     */
    public String createFolder(String folderPath) {
        String txt = folderPath;
        try {
            java.io.File myFilePath = new java.io.File(txt);
            txt = folderPath;
            if (!myFilePath.exists()) {
                myFilePath.mkdir();
            }
        }
        catch (Exception e) {
            message = "        ";
        }
        return txt;
    }
    
    /**
     *       
     * @param folderPath                        c:myf
     * @param paths        ,              a|b|c
     * @return               c:myfac
     */
    public String createFolders(String folderPath, String paths){
        String txts = folderPath;
        try{
            String txt;
            txts = folderPath;
            StringTokenizer st = new StringTokenizer(paths,"|");
            for(int i=0; st.hasMoreTokens(); i++){
                    txt = st.nextToken().trim();
                    if(txts.lastIndexOf("/")!=-1){ 
                        txts = createFolder(txts+txt);
                    }else{
                        txts = createFolder(txts+txt+"/");    
                    }
            }
       }catch(Exception e){
           message = "        !";
       }
        return txts;
    }

    
    /**
     *     
     * @param filePathAndName               
     * @param fileContent       
     * @return
     */
    public void createFile(String filePathAndName, String fileContent) {
     
        try {
            String filePath = filePathAndName;
            filePath = filePath.toString();
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            FileWriter resultFile = new FileWriter(myFilePath);
            PrintWriter myFile = new PrintWriter(resultFile);
            String strContent = fileContent;
            myFile.println(strContent);
            myFile.close();
            resultFile.close();
        }
        catch (Exception e) {
            message = "        ";
        }
    }


    /**
     *           
     * @param filePathAndName               
     * @param fileContent       
     * @param encoding         GBK    UTF-8
     * @return
     */
    public void createFile(String filePathAndName, String fileContent, String encoding) {
     
        try {
            String filePath = filePathAndName;
            filePath = filePath.toString();
            File myFilePath = new File(filePath);
            if (!myFilePath.exists()) {
                myFilePath.createNewFile();
            }
            PrintWriter myFile = new PrintWriter(myFilePath,encoding);
            String strContent = fileContent;
            myFile.println(strContent);
            myFile.close();
        }
        catch (Exception e) {
            message = "        ";
        }
    } 


    /**
     *     
     * @param filePathAndName               
     * @return Boolean       true      false
     */
    public boolean delFile(String filePathAndName) {
     boolean bea = false;
        try {
            String filePath = filePathAndName;
            File myDelFile = new File(filePath);
            if(myDelFile.exists()){
             myDelFile.delete();
             bea = true;
            }else{
             bea = false;
             message = (filePathAndName+"
        ");
            }
        }
        catch (Exception e) {
            message = e.toString();
        }
        return bea;
    }
    


    /**
     *      
     * @param folderPath          
     * @return
     */
    public void delFolder(String folderPath) {
        try {
            delAllFile(folderPath); //         
            String filePath = folderPath;
            filePath = filePath.toString();
            java.io.File myFilePath = new java.io.File(filePath);
            myFilePath.delete(); //      
        }
        catch (Exception e) {
            message = ("         ");
        }
    }
    
    
    /**
     *             
     * @param path          
     * @return
     * @return
     */
    public boolean delAllFile(String path) {
     boolean bea = false;
        File file = new File(path);
        if (!file.exists()) {
            return bea;
        }
        if (!file.isDirectory()) {
            return bea;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (path.endsWith(File.separator)) {
                temp = new File(path + tempList[i]);
            }else{
                temp = new File(path + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                delAllFile(path+"/"+ tempList[i]);//           
                delFolder(path+"/"+ tempList[i]);//       
                bea = true;
            }
        }
        return bea;
    }


    /**
     *       
     * @param oldPathFile         
     * @param newPathFile             
     * @return
     */
    public void copyFile(String oldPathFile, String newPathFile) {
        try {
            int bytesum = 0;
            int byteread = 0;
            File oldfile = new File(oldPathFile);
            if (oldfile.exists()) { //     
                InputStream inStream = new FileInputStream(oldPathFile); //     
                FileOutputStream fs = new FileOutputStream(newPathFile);
                byte[] buffer = new byte[1444];
                while((byteread = inStream.read(buffer)) != -1){
                    bytesum += byteread; //        
                    System.out.println(bytesum);
                    fs.write(buffer, 0, byteread);
                }
                inStream.close();
            }
        }catch (Exception e) {
            message = ("          ");
        }
    }
    

    /**
     *           
     * @param oldPath        
     * @param newPath           
     * @return
     */
    public void copyFolder(String oldPath, String newPath) {
        try {
            new File(newPath).mkdirs(); //                
            File a=new File(oldPath);
            String[] file=a.list();
            File temp=null;
            for (int i = 0; i < file.length; i++) {
                if(oldPath.endsWith(File.separator)){
                    temp=new File(oldPath+file[i]);
                }else{
                    temp=new File(oldPath+File.separator+file[i]);
                }
                if(temp.isFile()){
                    FileInputStream input = new FileInputStream(temp);
                    FileOutputStream output = new FileOutputStream(newPath + "/" +
                    (temp.getName()).toString());
                    byte[] b = new byte[1024 * 5];
                    int len;
                    while ((len = input.read(b)) != -1) {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if(temp.isDirectory()){//       
                    copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);
                }
            }
        }catch (Exception e) {
            message = "             ";
        }
    }


    /**
     *     
     * @param oldPath
     * @param newPath
     * @return
     */
    public void moveFile(String oldPath, String newPath) {
        copyFile(oldPath, newPath);
        delFile(oldPath);
    }
    

    /**
     *     
     * @param oldPath
     * @param newPath
     * @return
     */
    public void moveFolder(String oldPath, String newPath) {
        copyFolder(oldPath, newPath);
        delFolder(oldPath);
    }
    public String getMessage(){
        return this.message;
    }
}