java读写txt

    /**
     * 传入txt路径读取txt文件
     *
     * @param txtPath
     * @return 返回读取到的内容
     */
    public String readTxt(String txtPath) {
        File file = new File(txtPath);
        if (file.isFile() && file.exists()) {
            try {
                FileInputStream fileInputStream = new FileInputStream(file);
                InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

                StringBuffer sb = new StringBuffer();
                String text = null;
                while ((text = bufferedReader.readLine()) != null) {
                    sb.append(text);
                }
                return sb.toString();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }


    /**
     * 使用FileOutputStream来写入txt文件
     *
     * @param txtPath txt文件路径
     * @param content 需要写入的文本
     */
    public void writeTxt(String txtPath, String content) {
        FileOutputStream fileOutputStream = null;
        File file = new File(txtPath);
        try {
            if (file.exists()) {
                //判断文件是否存在，如果不存在就新建一个txt
                file.createNewFile();
            }
            fileOutputStream = new FileOutputStream(file);
            fileOutputStream.write(content.getBytes());
            fileOutputStream.flush();
            fileOutputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }