将字符串写入.txt文件问题!

Question

import java.io.*;
public class test {
  public static void main(String[] args){
     try{
FileWriter fw=new FileWriter("c:/today.txt",true);
BufferedWriter bw=new BufferedWriter(fw);
bw.write("abc\r\n");
bw.write("def\r\n");
bw.write("hijk");
bw.close();
fw.close();
     }
     catch(IOException e)
{}  }
}

Answer 1

PrintWriter pw = new PrintWriter(
                  new FileWriter("today.txt"));pw.println("abc");
pw.println("def");
pw.println("hef");
pw.close();

Answer 2

bw.write("abc\r\n");
bw.write("def\r\n");用bw.newLine()也可以换行

Answer 3

import java.io.*;public class test {
  public static void main(String[] args) {
    try {
      RandomAccessFile rf = new RandomAccessFile("c:/today.txt", "rw");
      rf.writeBytes("abc\r\n");
      rf.writeBytes("def\r\n");
      rf.writeBytes("hijk");
      rf.close();
    }
    catch (IOException e)
    {e.printStackTrace();}
  }
}

Answer 4

算了都说了..
FileOutputStream fos=new FileOutputStream("c:/dd.txt");
String s="abc\r\ndef\r\nhijk";
fos.write(s.getBytes());
fos.close();

Answer 5

thanks very much for all of your answers!!