Java8 新API读取文件内容

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使用Java8 提供的新API读取文件内容，代码简洁、方便。

1、测试代码

import java.io.IOException;import java.nio.charset.Charset;import java.nio.file.Files;import java.nio.file.Paths;import java.util.Arrays;import java.util.List;import java.util.stream.Collectors;import java.util.stream.Stream;/** * Java8 新API读取文件内容 * * Created by wangyingjie1 on 2017/2/22. */public class ReadFile {    public static void main(String[] args) {        try {            String fileName = "D:\\SrcCode\\Java8InAction\\src\\main\\resources\\lambdasinaction\\chap5\\data.txt";            //读取文件            Stream<String> stringStream = Files                    .lines(Paths.get(fileName), Charset.defaultCharset())                    .flatMap(line -> Arrays.stream(line.split(" ")));            List<String> words = stringStream.collect(Collectors.toList());            System.out.println("words===>" + words);            List<String> lineLists = Files                    .lines(Paths.get(fileName), Charset.defaultCharset())                    .flatMap(line -> Arrays.stream(line.split("\n")))                    .collect(Collectors.toList());            //输出文件函数            System.out.println("lineLists====" + lineLists.size());            //输出每一行文件内容            lineLists.stream().forEach(System.out::println);            //统计单词的个数            long uniqueWords = Files.lines(Paths.get(fileName), Charset.defaultCharset())                    .flatMap(line -> Arrays.stream(line.split(" ")))                    .distinct()                    .count();            System.out.println("There are " + uniqueWords + " unique words in data.txt");        } catch (IOException e) {            e.printStackTrace();        }    }}

2、文件data.txt
The quick brown fox jumped over the lazy dog
The lazy dog jumped over the quick brown fox

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