JAVA Create txt file, write the contents of the file, read the contents of the file

1 Package com.abin.facade.ws.mail.function;2 3 import Java.io.BufferedReader;4 import Java.io.File;5 import Java.io.FileOutputStream;6 import Java.io.FileReader;7 import Java.io.RandomAccessFile;8 9  Public classFileOperation {Ten   One  /** A * Create a file - * @param fileName - * @return the   */ -   Public Staticboolean createFile (File fileName) throws exception{ -Boolean flag=false; -   Try{ +    if(!filename.exists ()) { - filename.createnewfile (); +flag=true; A    } at}Catch(Exception e) { - e.printstacktrace (); -   } -   return true; -  }  -   in  /** - * Read txt file contents to * @param fileName + * @return -   */ the   Public StaticString readtxtfile (File fileName) throws exception{ *String result=NULL; $FileReader filereader=NULL;Panax NotoginsengBufferedReader bufferedreader=NULL; -   Try{ theFilereader=NewFileReader (fileName); +Bufferedreader=NewBufferedReader (filereader); A    Try{ theString read=NULL; +      while((Read=bufferedreader.readline ())! =NULL){ -Result=result+read+"\ r \ n"; $     } $}Catch(Exception e) { - e.printstacktrace (); -    } the}Catch(Exception e) { - e.printstacktrace ();Wuyi}finally{ the    if(bufferedreader!=NULL){ - bufferedreader.close (); Wu    } -    if(filereader!=NULL){ About filereader.close (); $    } -   } -System. out. println ("the contents of the file read are:"+"\ r \ n"+result); -   returnresult; A  } +   the   -   Public Staticboolean writetxtfile (String content,file fileName) throws exception{ $Randomaccessfile mm=NULL; theBoolean flag=false; theFileOutputStream o=NULL; the   Try { theo =NewFileOutputStream (fileName); -O.write (Content.getbytes ("GBK")); in o.close (); the //mm=new randomaccessfile (fileName, "RW"); the //mm.writebytes (content); Aboutflag=true; the}Catch(Exception e) { the    //Todo:handle Exception the e.printstacktrace (); +}finally{ -    if(mm!=NULL){ the mm.close ();Bayi    } the   } the   returnFlag; -  } -  the  the  the  Public Static voidcontenttotxt (String filePath, string content) { theString str =NewString ();//Original TXT content -String S1 =NewString ();//Content Updates the         Try { theFile f =NewFile (filePath); the             if(F.exists ()) {94System. out. Print ("File exists"); the}Else { theSystem. out. Print ("file does not exist"); theF.createnewfile ();//does not exist then creates98             } AboutBufferedReader input =NewBufferedReader (NewFileReader (f)); - 101              while(str = input.readline ())! =NULL) {102S1 + = str +"\ n";103             }104System. out. println (S1); the input.close ();106S1 + =content;107 108BufferedWriter output =NewBufferedWriter (NewFileWriter (f));109 Output.write (S1); the output.close ();111}Catch(Exception e) { the e.printstacktrace ();113  the         } the     } the 117}

JAVA Create txt file, write the contents of the file, read the contents of the file