文件拷贝

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class Test_05 {
    public static void main(String[] args) {
        FileInputStream fileInputStream = null;
        FileOutputStream fileOutputStream = null;
        try {
            fileInputStream = new FileInputStream("test_01");
            fileOutputStream = new FileOutputStream("test_02");
            byte[] bytes = new byte[2];
            int readCount = 0;
            while ((readCount = fileInputStream.read(bytes)) != -1){
                fileOutputStream.write(bytes, 0, readCount);
            }
            fileOutputStream.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fileInputStream != null) {
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }
}

*注意：当创建了多个流时，finall语句块中try...catch要分开写，一个流的关闭发生异常时不能影响其他流的关闭