content: package org.ruoyi.chain.loader;
  
  import dev.langchain4j.data.document.Document;
  import dev.langchain4j.data.document.parser.apache.tika.ApacheTikaDocumentParser;
  import lombok.AllArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import org.ruoyi.chain.split.TextSplitter;
  import org.ruoyi.common.core.exception.UtilException;
  import org.springframework.stereotype.Component;
  
  import java.io.BufferedInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.List;
  @Component
  @AllArgsConstructor
  @Slf4j
  public class ExcelFileLoader implements ResourceLoader {
      private final TextSplitter textSplitter;
      private static final int DEFAULT_BUFFER_SIZE = 8192;
      @Override
      public String getContent(InputStream inputStream) {
          // 使用带缓冲的输入流包装（保持原流不自动关闭）
          try (InputStream bufferedStream = new BufferedInputStream(inputStream, DEFAULT_BUFFER_SIZE)) {
              ApacheTikaDocumentParser apacheTikaDocumentParser = new ApacheTikaDocumentParser();
              Document document = apacheTikaDocumentParser.parse(bufferedStream);
              return document.text();
          } catch (IOException e) {
              String errorMsg = "Excel文件流读取失败";
              throw new UtilException(errorMsg, e);
          } catch (RuntimeException e) {
              String errorMsg = "Excel内容解析异常";
              throw new UtilException(errorMsg, e);
          }
      }
  
      @Override
      public List<String> getChunkList(String content, String kid) {
          return textSplitter.split(content, kid);
      }
  }
  