数据存储的另一种方式

Writing a file
  
FileOutputStream fOut = openFileOutput("samplefile.txt",
                                        MODE_WORLD_READABLE);
               OutputStreamWriter osw = new OutputStreamWriter(fOut); 

               // Write the string to the file
               osw.write(TESTSTRING);
               /* ensure that everything is
                * really written out and close */
               osw.flush();
               osw.close();


Reading the file


   FileInputStream fIn = openFileInput("samplefile.txt");
               InputStreamReader isr = new InputStreamReader(fIn);
               /* Prepare a char-Array that will
                * hold the chars we read back in. */
               char[] inputBuffer = new char[TESTSTRING.length()];
               // Fill the Buffer with data from the file
               isr.read(inputBuffer);
               // Transform the chars to a String
               String readString = new String(inputBuffer);
               
               // Check if we read back the same chars that we had written out
               boolean isTheSame = TESTSTRING.equals(readString);