JavaAPI(8) - Java IO(File Test)

Java로 개발 시에 File을 열고 쓰는 등의 기초 작업에 대하여 다뤄보겠습니다.

/**
 * Created by 진우 on 2016-07-19.
 */
public class MyManageTextFile {
    public static void main(String[] args) {
        MyManageTextFile managerTest = new MyManageTextFile();
        int count = 10;

        String path = "C:\\" + separator + "jinwoo.txt";
        //managerTest.writeFile(path, numberCount);
        managerTest.readFile(path);
        System.out.println();
        managerTest.readFileScanner(path);
    }

    public void writeFile(String fileName, int count) {
        FileWriter fw = null;
        BufferedWriter bw = null;

        try {
            fw = new FileWriter(fileName);
            bw = new BufferedWriter(fw);

            for(int loop=0; loop<=count; loop++) {
                bw.write(Integer.toString(loop));
                bw.newLine();
            }
            System.out.println("Write Success!");
        } catch(IOException ioe) {
            ioe.printStackTrace();
        } catch(Exception e) {
            e.printStackTrace();
        } finally {
            if(bw != null) {
                try {
                    bw.close();
                } catch(IOException ioe) {
                    ioe.printStackTrace();
                }
            }
            if(fw != null) {
                try {
                    fw.close();
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            }
        }
    }

    public void readFile(String fileName) {
        FileReader fr = null;
        BufferedReader br = null;

        try {
            fr = new FileReader(fileName);
            br = new BufferedReader(fr);
            String data;
            while((data = br.readLine()) != null) {
                System.out.println(data);
            }
            System.out.println("Read Success!");
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(br != null) {
                try {
                    br.close();
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            }
            if(fr != null) {
                try {
                    fr.close();
                } catch (IOException ioe) {
                    ioe.printStackTrace();
                }
            }
        }
    }

    public void readFileScanner(String fileName) {
        File file = new File(fileName);
        Scanner sc = null;
        try {
            sc = new Scanner(file);
            while(sc.hasNextLine()) {
                System.out.println(sc.nextLine());
            }
            System.out.println("Read Scanner Success!");
        } catch (FileNotFoundException fe) {
            fe.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if(sc != null) {
                sc.close();
            }
        }
    }
}