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 {  
        }
}