java文件IO操作

jopen 7年前

package com.io;      import java.io.File;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.FileWriter;  import java.io.InputStream;  import java.io.PrintWriter;    public  class  FileOperate  {        /**          *  新建目录          *  @param  folderPath  String  如  c:/fqf          *  @return  boolean          */        public static void  newFolder(String  folderPath)  {            try  {                String  filePath  =  folderPath;                File  myFilePath  =  new 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 static void  newFile(String  filePathAndName,  String  fileContent)  {                try  {                String  filePath  =  filePathAndName;                File  myFilePath  =  new  File(filePath);                if  (!myFilePath.exists())  {                    myFilePath.createNewFile();                   System.out.println("创建文件成功");              }                FileWriter  resultFile  =  new  FileWriter(myFilePath);                PrintWriter  myFile  =  new  PrintWriter(resultFile);                myFile.println(fileContent);                System.out.println("写入文件成功");              resultFile.close();            }            catch  (Exception  e)  {                System.out.println("新建文件操作出错");                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 static  void  delFile(String  filePathAndName)  {            try  {                File myDelFile  = new File(filePathAndName);                myDelFile.delete();                System.out.println("删除文件成功!");          }            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                File  myFilePath  =  new File(folderPath);                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())  //判读此抽象路径名表示的文件存在且 是一个目录          {                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);            }            // 拷贝文件      private void copyFile2(String source, String dest) {      try {       File in = new File(source);       File out = new File(dest);       FileInputStream inFile = new FileInputStream(in);       FileOutputStream outFile = new FileOutputStream(out);       byte[] buffer = new byte[1024];       int i = 0;       while ((i = inFile.read(buffer)) != -1) {       outFile.write(buffer, 0, i);      }//end while       inFile.close();       outFile.close();      }//end try      catch (Exception e) {         }//end catch      }//end copyFile  }