java读写文件

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;

public class Main
{
    public static void main(String[] argv)
    {
        try{
            BufferedReader reader = new BufferedReader(new FileReader(new File("../docs.txt")));
            BufferedWriter writer = new BufferedWriter(new FileWriter(new File("../docs.output")));
            String temp;
            while ((temp = reader.readLine()) != null)
            {
                writer.write(temp);
                writer.newLine();
            }
            reader.close();
            writer.close();
        }
        catch (Exception ex)
        {
            System.out.println(ex.getMessage());
        }
    }
}