读取文件内容

//从文件夹里面获取数据
String fileName = "C:\\Users\\Administrator\\Desktop\\test.txt";
//一行一行读取
List<String> lines = Files.readAllLines(Paths.get(fileName), StandardCharsets.UTF_8);
StringBuilder stringBuilder = new StringBuilder();
for (String line : lines) {
    stringBuilder.append(line);
}