作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/

使用BufferedReader对象的readLine()方法必须处理java.io.IOException异常(Exception).

一次可以读一行：

import java.io.FileReader;
import java.io.FileWriter;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
public class ConsoleOutput {
    public static void main(String arg[]) {
        if(arg.length != 2) {
            System.out.println("Usage: java CopyTextLines <infile> <outfile>");
            return;
        }
        try {
            String str;
            FileReader fr = new FileReader(arg[0]);
            BufferedReader br = new BufferedReader(fr);
            FileWriter fw = new FileWriter(arg[1]);
            BufferedWriter bw = new BufferedWriter(fw);
            while((str = br.readLine()) != null)
                bw.write(str);
            br.close();
            bw.close();
        } catch(IOException e) {
            System.out.println(e);
        }
    }
}

作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/