Android-checks whether the TXT file contains double-byte characters, androidtxt

Android-checks whether the TXT file contains double-byte characters, androidtxt

When reading double-byte characters, it mainly involves encoding selection:

Java code

1. Public static boolean isRightfulTXT (File f ){
2. // TODO Auto-generated method stub
3. String regexp = "[^ \ x00-\ xff]"; // Double Byte Character
4. Pattern p = Pattern. compile (regexp );
6. Try {
7. FileInputStream FCM = new FileInputStream (f );
8. // The "GBK" encoding method supports double-byte characters
9. InputStreamReader isr = new InputStreamReader (FCM, "GBK ");
10. BufferedReader br = new BufferedReader (isr );
11. String line = "";
12. While (line = br. readLine ())! = Null ){
13. // Read files row by row,
14. // Search whether the file contains double-byte characters
15. Matcher m = p. matcher (line );
16. If (m. find ()){
17. FCM. close ();
18. Isr. close ();
19. Br. close ();
20. Return false;
21. }
22. }
23. FCM. close ();
24. Isr. close ();
25. Br. close ();
26. } Catch (FileNotFoundException e ){
27. // TODO Auto-generated catch block
29. E. printStackTrace ();
30. } Catch (UnsupportedEncodingException e ){
31. // TODO Auto-generated catch block
32. E. printStackTrace ();
33. } Catch (IOException e ){
34. // TODO Auto-generated catch block
35. E. printStackTrace ();
36. }
38. Return true;
39. }

The code above: checks whether the txt file contains double-byte characters. If any, false is returned. Otherwise, true is returned.