public static void main(String args[]) throws Exception
{
FileReader fr=new FileReader("E:\\web.txt");
BufferedReader br=new BufferedReader(fr);
FileWriter fw=new FileWriter("E:\\aaa.txt");
BufferedWriter bw=new BufferedWriter(fw);
String tmp1;
while((tmp1=br.readLine())!=null)
{
String s=tmp1+"\n";
System.out.println(s);
bw.write(s);
}
bw.flush();
br.close();
bw.close();
}我发现,如果web.txt里面有四行的话,新生成的aaa.txt就比web.txt少了四个字节的大小,如果web.txt是五行的,就少了五个字节,我原来以为少了换行符这个字符,于是加上了“\n”,再后来的新文件,还是少了与行数相等的字节数,请问这是什么回事呢? 分不多了,请大家帮帮忙。谢谢
{
FileReader fr=new FileReader("E:\\web.txt");
BufferedReader br=new BufferedReader(fr);
FileWriter fw=new FileWriter("E:\\aaa.txt");
BufferedWriter bw=new BufferedWriter(fw);
String tmp1;
while((tmp1=br.readLine())!=null)
{
String s=tmp1+"\n";
System.out.println(s);
bw.write(s);
}
bw.flush();
br.close();
bw.close();
}我发现,如果web.txt里面有四行的话,新生成的aaa.txt就比web.txt少了四个字节的大小,如果web.txt是五行的,就少了五个字节,我原来以为少了换行符这个字符,于是加上了“\n”,再后来的新文件,还是少了与行数相等的字节数,请问这是什么回事呢? 分不多了,请大家帮帮忙。谢谢
String s=tmp1+"\r\n";
{
FileReader fr=new FileReader("E:\\web.txt");
BufferedReader br=new BufferedReader(fr); FileWriter fw=new FileWriter("E:\\aaa.txt");
BufferedWriter bw=new BufferedWriter(fw); String tmp1; while((tmp1=br.readLine())!=null)
{
String s=tmp1;
System.out.println(s);
bw.write(s);
bw.newLine();
System.out.println();
}
bw.flush();
br.close();
bw.close();
}
可以这么写 你自己试试
public static void main(String args[]) throws Exception {
FileReader fr = new FileReader("c:\\from.txt");
BufferedReader br = new BufferedReader(fr); FileWriter fw = new FileWriter("c:\\to.txt");
BufferedWriter bw = new BufferedWriter(fw);
boolean add = false ;
String tmp1; while ((tmp1 = br.readLine()) != null) {
if(add) {
bw.write("\r\n");
}
String s = tmp1 ;
System.out.println(s);
bw.write(s);
add = true;
} bw.flush();
br.close();
bw.close();
}
}