bldfs:使用BuffererReader.继承Reader类
public void fileRead() throws Exception { File file = new File("D:\test.txt");//定义一个file对象,用来初始化FileReader FileReader reader = new FileReader(file);//定义一个fileReader对象,用来初始化BufferedReader BufferedReader bReader = new BufferedReader(reader);//new一个BufferedReader对象,将文件内容读取到缓存 StringBuilder sb = new StringBuilder();//定义一个字符串缓存,将字符串存放缓存中 String s = ""; while ((s =bReader.readLine()) != null) {//逐行读取文件内容,不读取换行符和末尾的空格 sb.append(s + "n");//将读取的字符串添加换行符后累加存放在缓存中 System.out.println(s); } bReader.close(); String str = sb.toString(); System.out.println(str ); }健康的小鸭子: 使用FileInputStream类
private static String getTemplateContent() throws Exception{ File file = new File("D:\test.txt"); if(!file.exists()){ return null; } FileInputStream inputStream = new FileInputStream(file); int length = inputStream.available(); byte bytes[] = new byte[length]; inputStream.read(bytes); inputStream.close(); String str =new String(bytes, StandardCharsets.UTF_8); return str ;}