Java编程思想：文件读写实用工具

import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;

public class Test {
    public static void main(String[] args) {
        TextFile.test();
    }

}

class TextFile extends ArrayList<String> {

    public static String read(String fileName) {
        StringBuilder sb = new StringBuilder();
        try{
            BufferedReader in = new BufferedReader(
                    new FileReader(new File(fileName).getAbsoluteFile()));

            try{
                String str;
                while ((str=in.readLine()) != null) {
                    sb.append(str).append("\n");
                }
            }finally {
                in.close();
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e){
            throw new RuntimeException(e);
        }
        return sb.toString();
    }

    public static void write(String fileName, String text) {
        try {
            PrintWriter out = new PrintWriter(new File(fileName).getAbsoluteFile());

            try {
                out.println(text);
            } finally {
                out.close();
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public TextFile(String fileName, String splitter) {
        super(Arrays.asList(read(fileName).split(splitter)));
        if(get(0).equals(""))
            remove(0);
    }

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

    public static void test() {
        String file = read("./src/Test.java");
        write("./src/file5",file);
        String file5 = read("./src/file5");
//        System.out.println(file);
        System.out.println(file5);

        TextFile text = new TextFile("./src/file5");
//        text.write();
    }

}

/*
    读取二进制文件的工具
 */
class BinaryFile {
    public static byte[] read(File bFile) {
        try{
            BufferedInputStream bf = new BufferedInputStream(
                    new FileInputStream(bFile));

            try{
                byte[] data = new byte[bf.available()];
                bf.read(data);
                return data;
            } finally {
                bf.close();
            }
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static byte[] read(String bFile) {
        return read(new File(bFile).getAbsoluteFile());
    }
}