java 按行读取文件,并筛选包含指定字符行数据

`

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

public class TestController {

    public static void main(String[] args) {
        try {
            List<String> list = gtFilterList(new BufferedReader(new FileReader("C:\\Users\\WUKONG\\Desktop\\log.txt")));
            if (list != null){
                for (String string : list){
                    System.out.println(string);
                }
            }else{
                System.out.println("文件读取失败!");
            }
        } catch (FileNotFoundException e) {
            System.out.println("文件不存在!");
        }
    }

    public static List<String> gtFilterList(BufferedReader br){
        if (br != null) {
            return br.lines().filter(line -> line.contains("这")).collect(Collectors.toList());
        }
        return null;
    }

}

`