文件的拷贝

文件的拷贝：

方法一：

package com.xuzhiwen.io1;

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

public class FileCopy {
    public static void main(String[] args) throws IOException {
        FileInputStream in = new FileInputStream("test.txt");
        FileOutputStream out = new FileOutputStream("copytest.txt");
        int len;
        while((len = in.read()) != -1){
            out.write(len);
        }
        in.close();
        out.close();
    }
}

方法二：

package com.xuzhiwen.io1;

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

public class FileCopy {
    public static void main(String[] args) throws IOException {
        FileInputStream in = new FileInputStream("test.txt");
        FileOutputStream out = new FileOutputStream("copytest.txt");
        int len;
        byte b[] = new byte[1024];
        while((len = in.read(b)) != -1){
            out.write(b,0,len);
        }
        in.close();
        out.close();
    }
}

结果如下：