从一个文件读取数据然后写入另一个文件

public void readDataFromFileAndWriteToAotherFile(String oldUrl,String newUrl){

// File file = new File("D:\\abc.txt");  

File file = new File(newUrl);  

try {

        if (!file.exists() != false) {  

            file.createNewFile();  

        }  

} catch (IOException e) {  

e.printStackTrace();  

}

String line = null;

         try { 

        BufferedWriter bw = new BufferedWriter(new FileWriter(file));//打开写入流

           

        FileReader fr = new FileReader(oldUrl);//打开输出流

            BufferedReader br = new BufferedReader(fr);  

            while ((line = br.readLine()) != null) {//输出一行

                bw.write(line);//写入一行字符串  

                bw.newLine();//换行  

                bw.flush();  

            }  

            br.close();

            bw.close();

        } catch (Exception e) {

            e.printStackTrace();

        }finally {  

        }

}