IO基础

class FileHandle {
 /**
  * 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) {
  FileWriter resultFile = null;
  PrintWriter myFile = null;
  try {
   String filePath = filePathAndName;
   filePath = filePath.toString();
   File myFilePath = new File(filePath);
   if (!myFilePath.exists()) {
    myFilePath.createNewFile();
   }
   resultFile = new FileWriter(myFilePath);
   myFile = new PrintWriter(resultFile);
   String strContent = fileContent;
   myFile.println(strContent);

  } catch (Exception e) {
   System.out.println("新建目录操作出错");
   e.printStackTrace();
  } finally {
   try {
    if (myFile != null) {
     myFile.close();
    }
    if (resultFile != null) {
     resultFile.close();
    }
   } catch (IOException e) {
    e.printStackTrace();
   }
  }

 }

 /**
  * 删除文件
  *
  * @param filePathAndName
  *            String 文件路径及名称 如c:/fqf.txt
  * @return boolean
  */
 public void delFile(String filePathAndName) {

  String filePath = filePathAndName;
  filePath = filePath.toString();
  java.io.File myDelFile = new java.io.File(filePath);
  myDelFile.delete();

 }

 /**
  * 删除文件夹
  *
  * @param folderPath
  *            String 文件夹路径 如c:/fqf
  * @return boolean
  */
 public void delFolder(String folderPath) {

  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);
  System.out.println("=========" + myFilePath.getName());
  myFilePath.delete(); // 删除空文件夹

 }

 /**
  * 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()) {
    System.out.println("=========" + temp.getName());
    temp.delete();
   }
   if (temp.isDirectory()) {
    delAllFile(path + File.separator + tempList[i]);// 先删除文件夹里面的文件
    delFolder(path + File.separator + 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
  * @throws IOException
  */
 public void copyFile(String oldPath, String newPath) throws IOException {

  int bytesum = 0;
  int byteread = 0;
  InputStream inStream = null;
  FileOutputStream fs = null;
  try {
   File oldfile = new File(oldPath);
   if (oldfile.exists()) { // 文件存在时
    inStream = new FileInputStream(oldPath); // 读入原文件
    fs = new FileOutputStream(newPath);
    byte[] buffer = new byte[1024 * 4];
    while ((byteread = inStream.read(buffer)) != -1) {
     bytesum += byteread; // 字节数 文件大小
     System.out.println("文件大小:" + bytesum);
     fs.write(buffer, 0, byteread);
    }

   }
  } catch (IOException e) {
   e.printStackTrace();
   throw new IOException("拷贝文件" + oldPath + "时出错");
  } finally {
   try {
    if (fs != null) {
     fs.close();
    }
    if (inStream != null) {
     inStream.close();
    }
   } catch (Exception e) {
    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
  * @throws Exception
  */
 public void copyFolder(String oldPath, String newPath) throws Exception {
  FileInputStream input = null;
  FileOutputStream output = null;
  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()) {
     input = new FileInputStream(temp);
     output = new FileOutputStream(newPath + File.separator
       + (temp.getName()).toString());
     byte[] b = new byte[1024 * 5];
     int len;
     while ((len = input.read(b)) != -1) {
      output.write(b, 0, len);
     }
     output.flush();
    }
    if (temp.isDirectory()) {
     if (!temp.getAbsolutePath().contentEquals(
       new StringBuffer(newPath.replace('/', '//'))))
      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();
   throw new Exception("把" + oldPath + "拷贝到" + newPath + "时出错");

  } finally {
   try {
    if (output != null) {
     output.close();
    }
    if (input != null) {
     input.close();
    }
   } catch (Exception e) {
    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
  * @throws IOException
  */
 public void moveFile(String oldPath, String newPath) throws IOException {
  copyFile(oldPath, newPath);
  delFile(oldPath);

 }

 /**
  * 移动文件到指定目录
  *
  * @param oldPath
  *            String 如：c:/fqf
  * @param newPath
  *            String 如：d:/fqf
  * @throws Exception
  */
 public void moveFolder(String oldPath, String newPath) throws Exception {
  copyFolder(oldPath, newPath);
  delFolder(oldPath);

 }

 /**
  * 修改属性文件
  *
  * @param propFile
  *            要修改的属性文件
  * @param modifyProp
  *            要修改的属性
  * @throws IOException
  */
 public void modifyProp(String propFile, Map modifyProp) throws IOException {
  Properties proper = new Properties();

  FileInputStream finPut = new FileInputStream(propFile);
  proper.load(finPut);
  Iterator keys = (Iterator) modifyProp.keySet().iterator();
  while (keys.hasNext()) {
   String key = (String) keys.next();
   String value = (String) modifyProp.get(key);
   System.out.println("key==" + key);
   System.out.println("value==" + value);
   proper.put(key, value);

  }

  FileOutputStream foutPut = new FileOutputStream(propFile);
  proper.store(foutPut, "");

 }

 public void modifyFile(String propFile, Map modifyProp) throws IOException {
  FileReader fr = null;
  BufferedReader br = null;
  try {
   fr = new FileReader(propFile);
   br = new BufferedReader(fr);
   StringBuffer allProp = new StringBuffer();
   String temp;
   String key;
   String value;
   int end;
   // 执行修改和删除
   while (true) {
    temp = br.readLine();
    if (temp == null)
     break;
    end = temp.indexOf("=");
    if (end != -1) {
     key = temp.substring(0, end);
     value = (String) modifyProp.get(key);
     if (value != null && !"#delete;".equals(value)) {
      temp = key + "=" + value;
      modifyProp.remove(key);
     } else if ("#delete;".equals(value)) {
      temp = "";
      modifyProp.remove(key);
     }
    }
    allProp.append(temp);
    allProp.append("/r/n");
    // System.out.println(temp);
   }
   // 执行增加
   Iterator ite = modifyProp.keySet().iterator();
   while (ite.hasNext()) {
    key = (String) ite.next();
    value = (String) modifyProp.get(key);
    if (!"#delete;".equals(value)) {
     allProp.append(key + "=" + value);
     allProp.append("/r/n");
    }
    // System.out.println(key + "==" + value);
   }
   // System.out.println(allProp.toString());
   PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(
     propFile)));
   pw.write(allProp.toString());
   pw.close();
  } catch (IOException e) {
   throw new IOException("修改文件" + propFile + "出错");
  } finally {
   if (br != null) {
    br.close();
   }
   if (fr != null) {
    fr.close();
   }
  }
 }

}