java文件操作

package common.fileOperate;

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.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Title: File 常用操作(部分)


 * Description: 常用操作
 * Copyright: Copyright (c) sydxide
 * @authory sydxide
 * @version 1.0
 */

 

public class FileOperate {

 /**
  * 创建目录
  * 
  * @param folderPath:目录路径
  * @return
  * @throws IOException
  */
 public static boolean createFolder(String folderPath) throws IOException {
  boolean result = false;
  File f = new File(folderPath);
  result = f.mkdirs();
  return result;
 }

 /**
  * 删除目录下所有文件
  * 
  * @param directory
  *            (File 对象)
  */
 public void emptyDirectory(File directory) {
  File[] entries = directory.listFiles();
  for (int i = 0; i < entries.length; i++) {
   entries[i].delete();
  }
 }

 /**
  * 创建文件
  * 
  * @param filepath:文件所在目录路径,比如:c:/test/test.txt
  * @return
  */
 public static boolean makeFile(String filepath) throws IOException {
  boolean result = false;
  File file = new File(filepath);
  result = file.createNewFile();
  file = null;
  return result;
 }

 /**
  * 删除文件
  * 
  * @param filepath:文件所在物理路径
  * @return
  */
 public static boolean isDel(String filepath) {
  boolean result = false;
  File file = new File(filepath);
  result = file.delete();
  file = null;
  return result;
 }

 /**
  * 文件重命名
  * 
  * @param filepath:文件所在物理路径
  * @param destname:新文件名
  * @return
  */
 public static boolean renamefile(String filepath, String destname) {
  boolean result = false;
  File f = new File(filepath);
  String fileParent = f.getParent();
  String filename = f.getName();
  File rf = new File(fileParent + "//" + destname);
  if (f.renameTo(rf)) {
   result = true;
  }
  f = null;
  rf = null;
  return result;
 }

 /**
  * 将文件内容写入文件中
  * 
  * @param filepath:文件所在物理路径
  * @param content:写入内容
  * @throws Exception
  */
 public static void WriteFile(String filepath, String content)
   throws Exception {
  FileWriter filewriter = new FileWriter(filepath, true);// 写入多行
  PrintWriter printwriter = new PrintWriter(filewriter);
  printwriter.println(content);
  printwriter.flush();
  printwriter.close();
  filewriter.close();
 }

 /**
  * 日志备份
  * 
  * @param filePath:日志备份路径
  * @param baksize:日志备份大小参考值(字节大小)
  * @throws IOException
  */
 public static void logBak(String filePath, long baksize) throws IOException {
  File f = new File(filePath);
  long len = f.length();
  SimpleDateFormat simpledateformat = new SimpleDateFormat(
    "yyyyMMddHHmmss");
  String s = simpledateformat.format(new Date());
  String fileName = f.getName();
  int dot = fileName.indexOf(".");
  String bakName = s + fileName.substring(dot);
  System.out.println(bakName);
  if (len >= baksize) {
   renamefile(filePath, bakName);
   makeFile(filePath);
  }
  f = null;
 }

 /**
  * 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);

 }
}