java 读取写入TXT文件防止读取写入乱码

傷城~ 2023-01-20 08:10 28阅读 0赞

# 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();
                }
            }
        }