我正在开发一个命令行应用程序，通过删除用户通过命令行指定的单词来过滤文本文件。当代码在行内找到过滤词时，它会删除整行而不仅仅是单词。有没有办法将行拆分为单独的单词？
public class Main11 {
public static void main(String[] args) {
Scanner s=new Scanner (System.in);
System.out.println("<Source file> <Words to filter>");
String st1=s.nextLine();
String [] split1=st1.split(" ");
Path p = Paths.get(split1[0]);
try {
List<String> lines=Files.readAllLines(p, StandardCharsets.UTF_8);
List<String> filter = lines;
for(int i=0;i<lines.size();i++) {
for(int j=0;j<split1.length;j++) {
final int x=j;
filter=filter.stream().filter(line-> !line.contains(split1[x])).collect(Collectors.toList());
}
}
BufferedWriter writer = Files.newBufferedWriter(p);
for(int c=0;c<filter.size();c++) {
writer.write("\n" + filter.get(c));
}
writer.close();
System.out.println("Done");
} catch (IOException e) {
System.out.println("file not found");
}
s.close();
}
}
也许您可以将要过滤的单词存储在Set：
import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.Set;
import java.util.stream.Collectors;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter: <source-file> <words-to-filter>");
String input = scanner.nextLine();
String[] inputSplit = input.split(" ");
String sourceFile = inputSplit[0];
Path p = Paths.get(sourceFile);
Set<String> wordsToFilter = Set.of(Arrays.copyOfRange(inputSplit, 1, inputSplit.length));
try {
List<String> lines = Files.readAllLines(p, StandardCharsets.UTF_8);
List<String> filteredLines = new ArrayList<>(lines.size());
for (String line : lines) {
filteredLines.add(Arrays.stream(line.split(" "))
.filter(word -> !wordsToFilter.contains(word))
.collect(Collectors.joining(" ")));
}
BufferedWriter writer = Files.newBufferedWriter(p);
for (String filteredLine : filteredLines) {
if (!filteredLine.isEmpty()) {
writer.write(filteredLine + "\n");
}
}
writer.close();
System.out.println("Done filtering!");
} catch (IOException e) {
System.err.println("Error: file not found");
}
}
}
示例用法：
Enter: <source-file> <words-to-filter>
/Users/shash/Desktop/file.txt a c
Done filtering!
file.txt前：
a a a
a a a b a c d a
b b b d e r
file.txt后：
b d
b b b d e r
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