Spring Boot Elasticsearch搜索建议查询

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概述

在使用Elasticsearch中，我们需要在客户输入的时候，自动提示输入建议（搜索补全），类型百度搜索选择。

本文示例介绍通过Spring Boot来实现Elasticsearch。

es实例类

需要在实例类中，增加Completion属性，用于存储关键词。

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@CompletionField(maxInputLength = 100)
private Completion suggest;

存储到es时处理

把需要的属性关键字，存储到suggest中

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List<String> suggestlist =  new ArrayList<>();

esPojo.setSuggest(new Completion(suggestlist.toArray(new String[suggestlist.size()])));

调用代码

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@Autowired
private ElasticsearchTemplate elasticsearchTemplate;


@org.junit.Test
public void suggestion()  {
  try {
	String keyword = "en_Sili";

      //构造搜索建议语句,搜索条件字段
	CompletionSuggestionBuilder completionSuggestionBuilder = SuggestBuilders.completionSuggestion("suggest");
	//搜索关键字
	completionSuggestionBuilder.prefix(keyword);
	//去除重复
	completionSuggestionBuilder.skipDuplicates(true);
	//匹配数量
	completionSuggestionBuilder.size(20);

	SearchRequestBuilder searchRequestBuilder =elasticsearchTemplate.getClient().prepareSearch("item_index").setTypes("item");

	//根据
      SearchResponse suggestResponse = searchRequestBuilder.suggest(new SuggestBuilder().addSuggestion("my-suggest",completionSuggestionBuilder)).get();
      CompletionSuggestion completionSuggestion = suggestResponse.getSuggest().getSuggestion("my-suggest");

      List<CompletionSuggestion.Entry.Option> options = completionSuggestion.getEntries().get(0).getOptions();

      List<String> suggestList = new ArrayList<>();
      options.forEach(item ->{ suggestList.add(item.getText().string()); });

	for (String string : suggestList) {
		System.err.println(string);
	}
  } catch (Exception e) {
  	e.printStackTrace();
  }
}