聊聊langchain4j的Web Search Engine

最新推荐文章于 2025-09-11 09:51:18 发布

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最新推荐文章于 2025-09-11 09:51:18 发布 · 943 阅读

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#人工智能

序

本文主要研究一下langchain4j的Web Search Engine

步骤

pom.xml

<dependency>
    <groupId>dev.langchain4j</groupId>
    <artifactId>langchain4j-web-search-engine-searchapi</artifactId>
    <version>1.0.0-beta2</version>
</dependency>

example

    @Test
    public void testSearchEngine() {
        SearchApiWebSearchEngine searchEngine = SearchApiWebSearchEngine.builder()
                .apiKey(System.getenv("SEARCH_API_KEY"))
                .engine("baidu")
                .build();
        WebSearchTool webTool = WebSearchTool.from(searchEngine);

        Assistant assistant = AiServices.builder(Assistant.class)
                .chatLanguageModel(model)
                .tools(webTool)
                .chatMemory(MessageWindowChatMemory.withMaxMessages(10))
                .build();
        String result = assistant.search("今天日期是哪一天");
        System.out.println(result);
    }

输出如下：

根据搜索结果，今天的日期为2025年3月25日（星期二），在农历中则是2025年二月廿六。

更多详细信息您可以访问以下网站：
- [易灵算命网](http://old.d02.cn/suanming/nongli.php)
- [今天几号网](https://www.jintianjihao.com/)
- [快乐日历 - 今天什么日子,今天星期几,农历几月几日@快乐家园](http://www.joyurl.cn/)

源码

WebSearchEngine

dev/langchain4j/web/search/WebSearchEngine.java

public interface WebSearchEngine {

    /**
     * Performs a search query on the web search engine and returns the search results.
     *
     * @param query the search query
     * @return the search results
     */
    default WebSearchResults search(String query) {
        return search(WebSearchRequest.from(query));
    }

    /**
     * Performs a search request on the web search engine and returns the search results.
     *
     * @param webSearchRequest the search request
     * @return the web search results
     */
    WebSearchResults search(WebSearchRequest webSearchRequest);
}

langchain4j定义了WebSearchEngine接口，它定义了search方法，根据WebSearchRequest返回WebSearchResults

WebSearchRequest

dev/langchain4j/web/search/WebSearchRequest.java

public class WebSearchRequest {

    private final String searchTerms;
    private final Integer maxResults;
    private final String language;
    private final String geoLocation;
    private final Integer startPage;
    private final Integer startIndex;
    private final