content: package com.java2nb.novel.service.impl;
  
  import com.java2nb.novel.entity.BookContent;
  import com.java2nb.novel.service.BookContentService;
  import lombok.RequiredArgsConstructor;
  import lombok.SneakyThrows;
  import org.springframework.beans.factory.annotation.Value;
  import org.springframework.stereotype.Service;
  
  import java.io.BufferedReader;
  import java.io.FileReader;
  
  @Service(value = "txt")
  @RequiredArgsConstructor
  public class FileBookContentServiceImpl implements BookContentService {
  
      @Value("${content.save.path}")
      private String fileSavePath;
  
      @SneakyThrows
      @Override
      public BookContent queryBookContent(Long bookId, Long bookIndexId) {
          BufferedReader in = new BufferedReader(new FileReader(fileSavePath + "/" + bookId + "/" + bookIndexId + ".txt"));
          StringBuffer sb = new StringBuffer();
          String str;
          while ((str = in.readLine()) != null) {
              sb.append(str);
          }
          in.close();
          return new BookContent() {{
              setIndexId(bookIndexId);
              setContent(sb.toString());
          }};
      }
  }
  