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

}

`