Java——复制txt文件

将源文件复制到目标文件，同时输出源文件内容，需要提供一个源文件和目标文件路径参数(如果不存在则自动创建)

    public  static void  copyTxt(String sourceFile, String targetFile){
        try{
            String encoding = "GBK";
            File file = new File(sourceFile);
            if(file.exists() && file.isFile()){ //判断文件是否存在
                FileInputStream input = new FileInputStream(file);    //字节流
                FileOutputStream output = new FileOutputStream(new File(targetFile));
                
                InputStreamReader  read = new InputStreamReader (input,encoding);//字符流
                OutputStreamWriter write = new OutputStreamWriter(output,encoding);
                
                BufferedReader  bufferedReader  = new BufferedReader (read);//缓冲流
                BufferedWriter  bufferedWriter = new BufferedWriter(write);
                String line = "";
                while ( (line = bufferedReader.readLine() )!= null  ){
                        System.out.println(line);
                        bufferedWriter.write(line + "
");
                }
                bufferedReader.close();
                bufferedWriter.close();
            }else {
                System.out.println("找不到指定的文件");
            }
        }catch(IOException e){
            System.out.println("读取文件内容出错");
            e.printStackTrace();
        }
    }
}