import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;

/**
 * 一個非常實用的檔案操作類
 * 
 * @author zhangjunying
 * 
 */
 

public class TextFile extends ArrayList<String> {

    private static final long serialVersionUID = -1942855619975438512L;

    // 以字串形式讀取檔案
    public static String read(String filename) {
        StringBuilder sb = new StringBuilder();
        try {
            BufferedReader in = new BufferedReader(new
 
 FileReader(new File(
                    filename).getAbsoluteFile()));
            String s;
            try {
                while ((s = in.readLine()) != null) {
                    sb.append(s);
                    sb.append("\n");
                }
            } finally {
                in.close();
            }

        } catch
 
 (IOException e) {
            throw new RuntimeException(e);
        }
        return sb.toString();
    }

    // 在一個方法呼叫中寫一個檔案
    public static void write(String fileName, String text) {
        try {
            PrintWriter out = new PrintWriter(
                    new File(fileName).getAbsoluteFile());
            try {
                out.print(text);
            } finally {
                out.close();
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    // 讀取一個檔案，通過任何正則表示式拆分
    public TextFile(String fileName, String splitter) {
        super(Arrays.asList(read(fileName).split(splitter)));
        if (get(0).equals(""))
            remove(0);
    }

    // 正常按行讀取
    public TextFile(String fileName) {
        this(fileName, "\n");
    }

    public void write(String fileName) {
        try {
            PrintWriter out = new PrintWriter(
                    new File(fileName).getAbsoluteFile());
            try {
                for (String item : this)
                    out.println(item);
            } finally {
                out.close();
            }

        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * 讀取二進位制檔案
     * 
     * @param file
     *            file物件
     * @return
     * @throws IOException
     */
    public static byte[] BinaryFile(File file) throws IOException {
        BufferedInputStream bf = new BufferedInputStream(new FileInputStream(
                file));
        try {
            byte[] data = new byte[bf.available()];
            bf.read(data);
            return data;
        } finally {
            bf.close();
        }
    }

    /**
     * 讀取二進位制檔案
     * 
     * @param file
     *            檔案路徑
     * @return
     * @throws IOException
     */
    public static byte[] BinaryFile(String file) throws IOException {
        return BinaryFile(new File(file).getAbsoluteFile());
    }

    // 測試，我已經在根目錄生成了一個名為reflectDemo.java的檔案
    public static void main(String[] args) {

        String path = "/home/zhangjunying/Workspaces/MyEclipse Professional 2014/BasicInterviewQuestions/src/reflectDemo.java";

        /* read() 測試 */
        System.out.println(read(path));

        /* write() 測試 */
        write("out.d", "測試寫");

        /* 構造測試 */
        TextFile tf = new TextFile(path);

    }

}