JAVA 读写文件

xi5566

public static void main(String[] args) throws Exception {FileReader fr = new FileReader("c:\\cmd.txt");//读文件BufferedReader br = new BufferedReader(fr);//缓冲指定文件的输入File f = new File("f:\\cmd.txt");//文件if (!f.exists()) {//没有的话f.createNewFile();//创建}FileWriter fw = new FileWriter("f:\\cmd.txt");//写文件BufferedWriter bw = new BufferedWriter(fw);//缓冲指定文件的输入String tt = "";//空字符串while (br.ready()) {tt = br.readLine();//第一行bw.write(tt);//写入bw.newLine();//换行}bw.flush(); // 刷新该流的缓冲bw.close();fw.close();br.close();fr.close();}