How to implement instant search and auto-completion functions through the Webman framework?

How to implement instant search and auto-completion functions through the Webman framework?

With the rapid development of the Internet, our requirements for the user experience of web pages are getting higher and higher. One of the important requirements is instant search and auto-complete functions. When the user enters keywords in the input box, the page can quickly provide relevant search results based on the keywords or automatically prompt the user for possible inputs. In this article, we will introduce how to use the Webman framework to achieve these two functions.

First of all, we need to introduce the Webman framework into the project. This can be achieved by adding the following dependencies in the project's pom.xml file:

<dependency>
    <groupId>com.github.yuedeng</groupId>
    <artifactId>webman-spring-boot-starter</artifactId>
    <version>0.5.2</version>
</dependency>

Next, we need to configure some parameters of the Webman framework in the Spring Boot configuration file. You can add the following configuration in the application.properties file:

# 配置Webman框架的数据源
webman.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
webman.datasource.url=jdbc:mysql://localhost:3306/database_name?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
webman.datasource.username=root
webman.datasource.password=root

# 配置Webman框架的Redis缓存
webman.cache.type=redis
webman.cache.redis.host=localhost
webman.cache.redis.port=6379
webman.cache.redis.password=
webman.cache.redis.database=0

In the above configuration, we need to configure the database and Redis cache used by the Webman framework. The database is used to store search result data, and Redis is used to store cached data for the auto-complete function.

Next, we need to create a search service class to handle the logic of user input and search results. You can create a class named SearchService and add the following code to the class:

@Service
public class SearchService {

    @Autowired
    private WebmanTemplate webmanTemplate;

    public List<String> search(String keyword) {
        SearchQuery query = new SearchQuery("your_database_table_name");
        query.addFilter("content", Operator.LIKE, keyword);
        query.setLimit(10);
        SearchResponse response = webmanTemplate.search(query);

        List<String> results = new ArrayList<>();
        for (SearchHit hit : response.getHits()) {
            results.add(hit.getSource().get("content").toString());
        }
        return results;
    }

    public List<String> autoComplete(String keyword) {
        AutoCompleteQuery query = new AutoCompleteQuery("your_redis_key_prefix", keyword);
        query.setLimit(10);
        AutoCompleteResponse response = webmanTemplate.autoComplete(query);

        List<String> results = new ArrayList<>();
        for (AutoCompleteHit hit : response.getHits()) {
            results.add(hit.getValue());
        }
        return results;
    }
}

In the above code, we have injected a WebmanTemplate instance, which is the core of interacting with data sources and caches provided by the Webman framework kind. In the search method, we use SearchQuery to construct a search query, then use webmanTemplate to perform the query operation, and convert the search results into a List for return. In the autoComplete method, we use AutoCompleteQuery to build an auto-complete query, and then also use webmanTemplate to perform the query operation, and convert the results of the auto-prompt into a List for return.

Finally, we need to handle the user's request in the controller. You can create a controller class named SearchController and add the following code to the class:

@RestController
public class SearchController {

    @Autowired
    private SearchService searchService;

    @GetMapping("/search")
    public List<String> search(@RequestParam("keyword") String keyword) {
        return searchService.search(keyword);
    }

    @GetMapping("/autocomplete")
    public List<String> autoComplete(@RequestParam("keyword") String keyword) {
        return searchService.autoComplete(keyword);
    }
}

In the above code, we injected the SearchService instance and defined two interfaces for processing search requests. and autocomplete requests. By passing the keyword parameter in the request, the controller will call the corresponding SearchService method and return the search results or automatically prompted results.

So far, we have completed all the steps to use the Webman framework to implement instant search and auto-complete functions. Next, we can launch the application and test our functionality by accessing the following URL:

• Search interface: http://localhost:8080/search?keyword=Keyword
• Autocomplete interface: http://localhost:8080/autocomplete?keyword=Keyword

In the test, we can see that according to the entered keywords, the page will quickly display the corresponding search results or automatically prompted results.

Through the introduction of this article, we have learned how to use the Webman framework to implement instant search and automatic completion functions. Through the application of these functions, we can improve the user experience of web pages and allow users to find the information they need more easily. At the same time, this is also an application example of the Webman framework, I hope it will be helpful to readers.

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