阿超
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java读取本地目录的文件转换为list
不在沉默中爆发,就在沉默中灭亡。——鲁迅
我读取了我的全部博客内容并转换成了一个List<String>
代码如下:
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| import java.io.*; import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Optional; import java.util.stream.Collectors;
class Scratch { public static void main(String[] args) throws Exception { List<File> fileNames = getFileNames("D:/file/blog/backup/blog/source/_posts/"); List<String> collect = fileNames.parallelStream().map(Scratch::readFile).collect(Collectors.toList()); collect.forEach(System.out::println); }
private static List<File> getFileNames(String filePath) { File file = new File(filePath); if (!file.exists()) { System.err.println("【" + filePath + " not exists】"); } return Optional.ofNullable(file.listFiles()).map(Arrays::asList).orElseGet(Collections::emptyList); }
public static void readToBuffer(StringBuffer buffer, File file) throws IOException { InputStream is = new FileInputStream(file); String line; BufferedReader reader = new BufferedReader(new InputStreamReader(is)); line = reader.readLine(); while (line != null) { buffer.append(line); buffer.append("\n"); line = reader.readLine(); } reader.close(); is.close(); }
public static String readFile(File file) { StringBuffer sb = new StringBuffer(); try { readToBuffer(sb, file); } catch (IOException e) { e.printStackTrace(); } return sb.toString(); } }
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效果如下: