java怎么创建目录(删除/修改/复制目录及文件)代码实例

import java.io.*;
public class FileOperate { 
  public FileOperate() { 
  }
  /** 
   * 新建目录 
   * @param folderPath String 如 c:/fqf 
   * @return boolean 
   */ 
  public void newFolder(String folderPath) { 
    try { 
      String filePath = folderPath; 
      filePath = filePath.toString(); 
      java.io.File myFilePath = new java.io.File(filePath); 
      if (!myFilePath.exists()) { 
        myFilePath.mkdir(); 
      } 
    } 
    catch (Exception e) { 
      System.out.println("新建目录操作出错"); 
      e.printStackTrace(); 
    } 
  }
  /** 
   * 新建文件 
   * @param filePathAndName String 文件路径及名称 如c:/fqf.txt 
   * @param fileContent String 文件内容 
   * @return boolean 
   */ 
  public void newFile(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); 
      resultFile.close();
    } 
    catch (Exception e) { 
      System.out.println("新建目录操作出错"); 
      e.printStackTrace();
    }
  }
  /** 
   * 删除文件 
   * @param filePathAndName String 文件路径及名称 如c:/fqf.txt 
   * @param fileContent String 
   * @return boolean 
   */ 
  public void delFile(String filePathAndName) { 
    try { 
      String filePath = filePathAndName; 
      filePath = filePath.toString(); 
      java.io.File myDelFile = new java.io.File(filePath); 
      myDelFile.delete();
    } 
    catch (Exception e) { 
      System.out.println("删除文件操作出错"); 
      e.printStackTrace();
    }
  }
  /** 
   * 删除文件夹 
   * @param filePathAndName String 文件夹路径及名称 如c:/fqf 
   * @param fileContent String 
   * @return boolean 
   */ 
  public void delFolder(String folderPath) { 
    try { 
      delAllFile(folderPath); //删除完里面所有内容 
      String filePath = folderPath; 
      filePath = filePath.toString(); 
      java.io.File myFilePath = new java.io.File(filePath); 
      myFilePath.delete(); //删除空文件夹
    } 
    catch (Exception e) { 
      System.out.println("删除文件夹操作出错"); 
      e.printStackTrace();
    }
  }
  /** 
   * 删除文件夹里面的所有文件 
   * @param path String 文件夹路径 如 c:/fqf 
   */ 
  public void delAllFile(String path) { 
    File file = new File(path); 
    if (!file.exists()) { 
      return; 
    } 
    if (!file.isDirectory()) { 
      return; 
    } 
    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]);//先删除文件夹里面的文件 
        delFolder(path+"/"+ tempList[i]);//再删除空文件夹 
      } 
    } 
  }
  /** 
   * 复制单个文件 
   * @param oldPath String 原文件路径 如：c:/fqf.txt 
   * @param newPath String 复制后路径 如：f:/fqf.txt 
   * @return boolean 
   */ 
  public void copyFile(String oldPath, String newPath) { 
    try { 
      int bytesum = 0; 
      int byteread = 0; 
      File oldfile = new File(oldPath); 
      if (oldfile.exists()) { //文件存在时 
        InputStream inStream = new FileInputStream(oldPath); //读入原文件 
        FileOutputStream fs = new FileOutputStream(newPath); 
        byte[] buffer = new byte[1444]; 
        int length; 
        while ( (byteread = inStream.read(buffer)) != -1) { 
          bytesum += byteread; //字节数 文件大小 
          System.out.println(bytesum); 
          fs.write(buffer, 0, byteread); 
        } 
        inStream.close(); 
      } 
    } 
    catch (Exception e) { 
      System.out.println("复制单个文件操作出错"); 
      e.printStackTrace();
    }
  }
  /** 
   * 复制整个文件夹内容 
   * @param oldPath String 原文件路径 如：c:/fqf 
   * @param newPath String 复制后路径 如：f:/fqf/ff 
   * @return boolean 
   */ 
  public void copyFolder(String oldPath, String newPath) {
    try { 
      (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹 
      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()){//如果是子文件夹 
          copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]); 
        } 
      } 
    } 
    catch (Exception e) { 
      System.out.println("复制整个文件夹内容操作出错"); 
      e.printStackTrace();
    }
  }
  /** 
   * 移动文件到指定目录 
   * @param oldPath String 如：c:/fqf.txt 
   * @param newPath String 如：d:/fqf.txt 
   */ 
  public void moveFile(String oldPath, String newPath) { 
    copyFile(oldPath, newPath); 
    delFile(oldPath);
  }
  /** 
   * 移动文件到指定目录 
   * @param oldPath String 如：c:/fqf.txt 
   * @param newPath String 如：d:/fqf.txt 
   */ 
  public void moveFolder(String oldPath, String newPath) { 
    copyFolder(oldPath, newPath); 
    delFolder(oldPath);
  } 
}

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