Java替换文件夹中txt某一个字符

• 替换文件夹中txt某一个字符

 public void testTH(){
        String filePath = "F:\代码\extract-data\storage-cassandra\data";
        String path = "F:\代码\extract-data\storage-cassandra\datax";

        File fileDir = new File(filePath);
        //遍历文件
        for (File file : fileDir.listFiles()) {
            String newFileName = file.getName();
            String newfilePath = path + File.separator + newFileName;
            BufferedReader bufferedReader = null;
            try {
                //构造一个BufferedReader类来读取文件
                bufferedReader = new BufferedReader(new FileReader(file));
                String linetxt = null;
                //result用来存储文件内容
                StringBuilder result = new StringBuilder();
                //按使用readLine方法，一次读一行
                while ((linetxt = bufferedReader.readLine()) != null) {
               
                    String newconttent = linetxt.replace("普通用户","user");//替换
                    result.append(newconttent);
                    File newfile = new File(newfilePath);
                    PrintStream ps = new PrintStream(new FileOutputStream(newfile, true));
                    ps.println(newconttent);// 往aim.txt文件里写入字符串
                }
                //输出读出的所有数据（StringBuilder类型）
//            System.out.println(result);
                //对文件内容操作


            } catch (Exception e) {
                System.out.println("读取文件内容出错");
                e.printStackTrace();
            }finally {
                try {
                    bufferedReader.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }
        }
        

    }