Java 读取写入TXT文件

BuuferedReader + FileReader 方式去读txt文本数据

/**
     * 第一种读取文件方法
     * 读取TXT文件并在控制台中打印
     * BufferedReader 下 FileReader 的使用方法 无文件格式化有可能乱码
     *
     * @param path
     * @return
     */
    public static String readTxt(String path) {
        BufferedReader bufferedReader = null;
        try {
            bufferedReader = new BufferedReader(new FileReader(path));
            String txt = "";
            StringBuffer stringBuffer = new StringBuffer();
            while (null != (txt = bufferedReader.readLine())) {
                stringBuffer.append(txt);
            }
            System.err.println(stringBuffer.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

BufferedReader + InputStreamReader 读取TXT 文本数据

/**
     * 第二种读取文件方法
     * 读取TXT文件并在控制台中打印
     * BufferedReader 下 InputStreamReader 使用方法 规定文件格式防止乱码
     *
     * @param path
     * @return
     */
    public static String readTxtLuanMa(String path) {
        BufferedReader bufferedReader = null;
        String fileContent = "";
        try {
            bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(path), "UTF-8"));
            String txt = "";
            StringBuffer stringBuffer = new StringBuffer();
            while (null != (txt = bufferedReader.readLine())) {
                stringBuffer.append(txt);
            }
            fileContent = stringBuffer.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return fileContent;
    }

BufferedWriter + OutputStreamWriter 写入规定写入数据格式

/**
     * 第一种写入
     *
     * @param path
     * @param fileContent
     */
    public static void writeTxt(String path, String fileContent) {
        BufferedWriter bufferedWriter = null;
        try {
            File file = new File(path);
            if (!file.exists()) {
                file.createNewFile();
            }
            bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), "UTF-8"));
            bufferedWriter.write(fileContent);
            bufferedWriter.flush();
            bufferedWriter.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

BufferedWriter 写入TXT文件

/**
     * 第二种写入
     *
     * @param path
     * @param fileContent
     */
    public static void writeTxtFileWriter(String path, String fileContent) {
        BufferedWriter bufferedWriter = null;
        try {
            File file = new File(path);
            if (!file.exists()) {
                file.createNewFile();
            }
            bufferedWriter = new BufferedWriter(new FileWriter(file));
            bufferedWriter.write(fileContent);
            bufferedWriter.flush();
            bufferedWriter.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

FileOutputStream 写入TXT文件

/**
     * 第三种写入
     *
     * @param path
     * @param fileContent
     */
    public static void writeTxtFileOutputStream(String path, String fileContent) {
        FileOutputStream fileOutputStream = null;
        try {
            File file = new File(path);
            if (!file.exists()) {
                file.createNewFile();
            }
            fileOutputStream = new FileOutputStream(file);
            fileOutputStream.write(fileContent.getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                fileOutputStream.flush();
                fileOutputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }