Question

我需要帮助创建一个循环，该循环将返回一个字符串，通过使用预定义的操作替换其中包含在hashmarks中的单词。这些包括getRandomElement，getPhrases和replace，都属于类“parserHelperImpl”。我到目前为止编写的代码如下。在单独的类中是此parserHelperImpl类中使用的代码。特别是我被困住的地方是创建一些东西来移动随机短语，这里命名为“原型”，并找到被哈希标记包围的单词。有关正则表达式的文档略高于我的消化级别。

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.List;


public class PhraseGeneratorFromFile implements PhraseGenerator {

    private ParserHelperImpl parserHelper;

    public PhraseGeneratorFromFile(String filename) {
        // read file
        StringBuilder fileContent = new StringBuilder();
        BufferedReader br = new BufferedReader(new FileReader("corporate.txt"));
        try {

            String line = br.readLine();

                while (line != null) {
                fileContent.append(line);
                fileContent.append('\n');
                line = br.readLine();
            }
            String everything = fileContent.toString();
        } finally {
            br.close();
        }


        parserHelper = new ParserHelperImpl();


        List<String> phraseCollection = parserHelper.getPhrases(fileContent,"phrases:");
        String archetype = parserHelper.getRandomElement(phraseCollection);

    }


import java.io.IOException;
import java.io.StreamTokenizer;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;



public class ParserHelperImpl implements ParserHelper{

    @Override
    public List<String> getPhrases(StringBuilder fileContent, String token) {
          StreamTokenizer tokenizer = new StreamTokenizer(new StringReader(fileContent.toString()));
          List<String> list = new ArrayList<String>();
          try {
            while (tokenizer.nextToken() != StreamTokenizer.TT_EOF) {
                if (tokenizer.sval.equals(token)) {
                  tokenizer.nextToken();  // '[' 
                  do {
                    tokenizer.nextToken();  // go to the number
                    list.add(String.valueOf(tokenizer.sval));
                  } while (tokenizer.nextToken() == ',');
                  break;
                }
              }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 
          return list;
        }

    @Override
    public String replace(String templatePhrase, String token, String wordToPut) {
        return templatePhrase.replace(token, wordToPut);
    }

    @Override
    public String getRandomElement(List<String> list) {
        double randnum = Math.random() * list.size();
        int randindex = (int) randnum;
        return list.get(randindex);
    }

}

Answer 1

您需要使用像#[^#]+#这样的正则表来查找由哈希标记包围的单词。迭代匹配并替换每个匹配...大概你必须致电getRandomElement来获取替换词。

字符串中的单词替换

1 个答案: