Text Mining(1) text importing, 文本数据导入，java

Schema

Related class

1. Scanner
   • Text IO
2. File
   • ieterate the files for a given fold and read the file content.
3. Buffereader
   • read the file content into buffer, for further processing.
4. try...catch...finally
   • exceptions handling.

code sample

        try {
            Scanner scanner = new Scanner(System.in);

            String[] dataStrings = null;
            String isExit = "n";
            while (isExit.equals("n")) {
                System.out.println("1. Text importing;\n2. Text ");
                int option = scanner.nextInt();
                System.out.println("option: " + option);
                switch (option) {
                case 1:
                    System.out.println("enter the file directory:\n");
                    String directoryString = scanner.nextLine();
                    directoryString = scanner.nextLine();
                System.out.println("directory:"+directoryString);
                    File dirFile = new File(directoryString);
                    File[] files = dirFile.listFiles();
                    dataStrings = new String[files.length];
                    for (int i = 0; i < files.length; i++) {
                        BufferedReader bReader = new BufferedReader(new FileReader(files[i]));
                        String conteString = "";
                        String lineString = bReader.readLine();
                        while (lineString != null) {
                            conteString += lineString;
                            lineString = bReader.readLine();
                        }
                        bReader.close();
                        dataStrings[i] = conteString;
                        System.out.println(conteString);
                    }
                    break;
                case 2:

                    break;

                case 3:

                    break;

                case 4:

                    break;
                default:
                    break;
                }
                System.out.println("do you want to exit the program?(y/n) ");
                isExit = scanner.next();
            }
            scanner.close();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        } finally {
            System.out.println("program exited!");
        }

作者 @FL
2019 年 04月 24日