java 将字符串存到txt 并读取操作

//写入txt文件
try {
      String encryptData = “helloWorld”
   //写入指定文件中
            BufferedWriter bw = new BufferedWriter(new FileWriter("src/text/data.txt"));
            bw.write(encryptData);
            bw.close();
        } catch (IOException ex) {
            Logger.getLogger(EncryptTest.class.getName()).log(Level.SEVERE, null, ex);
        }

//从txt文件中读取数据
try {
            BufferedReader br = new BufferedReader(new FileReader("src/text/data.txt"));
            String demo = br.readLine();
            System.out.println("读取txt文件数据：" + demo);
          
            br.close();
        } catch (IOException ex) {
            Logger.getLogger(EncryptTest.class.getName()).log(Level.SEVERE, null, ex);
        }