SpringCloud（九.2）ES 进阶 -- RestAPI实现自动补全查询

 

 

语法

 

备注：因是只是案例讲解对应关系， “hotelSuggestion” "title_suggest" 和上图的 “mySuggestion” 是一个东西 ，都是suggest的名称，正常开发时应该保持为一个名称。

 

 

酒店demo 单元测试案例：

@Test
    void testSuggest() throws IOException {
        // 1.准备请求
        SearchRequest request = new SearchRequest("hotel");
        // 2.请求参数
        request.source().suggest(new SuggestBuilder()
                .addSuggestion(
                        "hotelSuggest",
                        SuggestBuilders
                                .completionSuggestion("suggestion")
                                .size(10)
                                .skipDuplicates(true)
                                .prefix("s")
                ));
        // 3.发出请求
        SearchResponse response = client.search(request, RequestOptions.DEFAULT);
        // 4.解析
        Suggest suggest = response.getSuggest();
        // 4.1.根据名称获取结果
        CompletionSuggestion suggestion = suggest.getSuggestion("hotelSuggest");
        // 4.2.获取options
        for (CompletionSuggestion.Entry.Option option : suggestion.getOptions()) {
            // 4.3.获取补全的结果
            String str = option.getText().toString();
            System.out.println(str);
        }
    }

结果展示：

 

 

酒店demo实战案例

Controller 编写接口  key为搜索的关键字

@GetMapping("suggestion")
    public List<String> getSuggestion(@RequestParam("key") String key) {        
        return hotelService.getSuggestion(key);
    }

 

alt+enter 补齐IService，Service实现getSuggestion方法

Service

@Override
    public List<String> getSuggestion(String key) {
        try {
            // 1.准备请求
            SearchRequest request = new SearchRequest("hotel");
            // 2.请求参数
            request.source().suggest(new SuggestBuilder()
                    .addSuggestion(
                            "hotelSuggest",
                            SuggestBuilders
                                    .completionSuggestion("suggestion")
                                    .size(10)
                                    .skipDuplicates(true)
                                    .prefix(key)
                    ));
            // 3.发出请求
            SearchResponse response = restHighLevelClient.search(request, RequestOptions.DEFAULT);
            // 4.解析
            Suggest suggest = response.getSuggest();
            // 4.1.根据名称获取结果
            CompletionSuggestion suggestion = suggest.getSuggestion("hotelSuggest");
            // 4.2.获取options
            List<String> list = new ArrayList<>();
            for (CompletionSuggestion.Entry.Option option : suggestion.getOptions()) {
                // 4.3.获取补全的结果
                String str = option.getText().toString();
                // 4.4.放入集合
                list.add(str);
            }
            return list;
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }