Question

到目前为止，我已经制作了一个程序，可以在文本文件中搜索单个字符串。它确实给出了我搜索的字符串的索引。但是，如何在单个文本文件中搜索多个字符串？

到目前为止，如果我使用扫描仪输入“Alice”，我的输出将是：

Got a match at line 17

Got a match at line 19

Got a match at line 20

Got a match at line 21

但是如果有可能的话，我怎么能在我的扫描仪中搜索，Alice，John，Steven作为我的输入和我的输出如下：

Got a match for Alice at line 17

Got a match at John at line 19

Got a match at Steven at line 20

Got a match at Steven at line 21

public static void main(String[]args) throws IOException{

    int nnames;
    String[] names;
    String stringSearch = null;

    Scanner scan = new Scanner(System.in);
    //for(int i=1;i<=3;i++){
    stringSearch = scan.nextLine();

    ArrayList<String> words = new ArrayList<String>();
    BufferedReader reader = new BufferedReader(new FileReader("File1.txt"));


    String line;

    while ((line = reader.readLine()) != null) {                
        words.add(line);
    }reader.close();


    Collections.sort(words);
     System.out.println("ArrayList elements after sorting in ascending order : ");
     System.out.println("");
        for(int i=0; i<words.size(); i++)
          System.out.println(words.get(i));


    for(String sLine : words) 
    {
        if (sLine.contains(stringSearch)) 
        {
            int index = words.indexOf(sLine);
            System.out.println("");
            System.out.println("Got a match at line " + index);

        }
     }



    System.out.println(words.size());
    }

Answer 1

将if - 块替换为您要查找的所有字符串

for(String sLine : words) 
{
    for(String searchWord: searchWords)
    {
        if (sLine.contains(searchWord)) 
        {
            int index = words.indexOf(sLine);
            System.out.println("");
            System.out.println("Got a match of "+searchWord+" at line " + index);
        }
    }
 }

Answer 2

试试这个

import java.util.Scanner;
import java.util.ArrayList;
import java.util.*;
import java.io.*;
class x{
public static void main(String[]args) throws IOException{

    int nnames;
    String[] names;
    String stringSearch[] = new String[2];

 //   Scanner scan = new Scanner(System.in);
    //for(int i=1;i<=3;i++){
 //   stringSearch = scan.nextLine();

    stringSearch[0]="hello";   //list of words to search
    stringSearch[1]="world";
    ArrayList<String> words = new ArrayList<String>();
    BufferedReader reader = new BufferedReader(new FileReader("File1.txt"));


    String line;

    while ((line = reader.readLine()) != null) {                
        words.add(line);
    }reader.close();


    Collections.sort(words);
//     System.out.println("ArrayList elements after sorting in ascending order : ");
//     System.out.println("");
        // for(int i=0; i<words.size(); i++)
          // System.out.println(words.get(i));

for(int i=0;i<2;i++){
    for(String sLine : words) 
    {
        if (sLine.contains(stringSearch[i])) 
        {
            int index = words.indexOf(sLine);
            System.out.println("");
            System.out.println("Got a match of "+stringSearch[i] +" at line " + index);

        }
     }}



    System.out.println(words.size());
    }
    }

如果您想从输入中获取所有搜索字符串然后尝试这个

searchString=item to search seperated by ','
String[] splits = searchString.split(",");

单个文本文件中的多个搜索

2 个答案: