Randomaccessfile Operating files

1  Packagefile;2 3 ImportJava.io.File;4 ImportJava.io.FileInputStream;5 ImportJava.io.FileOutputStream;6 Importjava.io.IOException;7 ImportJava.io.RandomAccessFile;8 9 Ten  Public classinsertcontent { One  A      Public Static voidInsert (String fileName,LongPos,string insertcontent)throwsioexception{ -File tmp = file.createtempfile ("tmp",NULL); - tmp.deleteonexit (); the         Try( -Randomaccessfile RAF =NewRandomaccessfile (FileName, "RW"); -FileOutputStream tmpout =NewFileOutputStream (TMP); -FileInputStream Tmpinputstream =NewFileInputStream (TMP) +             ){ -             //move the record pointer to the end of the file append content + //Raf.seek (Raf.length ()); A              at             //move the record pointer to the specified position - Raf.seek (POS); -              -             byte[] Bbuf =New byte[64]; -          -             intHasread = 0; in              -StringBuffer SBF =NewStringBuffer (); to              +              while((Hasread = Raf.read (bbuf)) > 0 ){ -Tmpout.write (bbuf, 0, hasread); theSbf.append (NewString (BBUF)); *             } $ System.out.println (sbf.tostring ());Panax Notoginseng              - Raf.seek (POS); the              + Raf.write (Insertcontent.getbytes ()); A              the              while((Hasread = Tmpinputstream.read (bbuf)) > 0) { +Raf.write (bbuf, 0, hasread); -             } $         } $     } -      -      Public Static voidMain (string[] args) { the         Try { -Insert ("F:/new 1.txt", "AJSDKJFKSLDJFKL");Wuyi}Catch(IOException e) { the e.printstacktrace (); -         } Wu     } -}

Randomaccessfile Operating files