下拉提示Demo

V3.1.3 SDK 下拉列表搜索样例代码

package com.aliyun.opensearch;
import com.alibaba.fastjson.JSONArray;
import com.aliyun.opensearch.sdk.dependencies.com.google.common.collect.Lists;
import com.aliyun.opensearch.sdk.dependencies.org.json.JSONObject;
import com.aliyun.opensearch.sdk.generated.OpenSearch;
import com.aliyun.opensearch.sdk.generated.commons.OpenSearchClientException;
import com.aliyun.opensearch.sdk.generated.commons.OpenSearchException;
import com.aliyun.opensearch.sdk.generated.search.*;
import com.aliyun.opensearch.sdk.generated.search.general.SearchResult;
import com.aliyun.opensearch.search.SearchParamsBuilder;
import com.aliyun.opensearch.search.SearchResultDebug;
import java.nio.charset.Charset;
public class testSuggest {
    private static String appName = "替换为opensearch应用名";
    private static String accesskey = "替换accesskey";
    private static String secret = "替换secret";
    private static String host = "替换应用的API访问地址";
    public static void main(String[] args) {
        //查看文件和默认编码格式
        System.out.println(String.format("file.encoding: %s", System.getProperty("file.encoding")));
        System.out.println(String.format("defaultCharset: %s", Charset.defaultCharset().name()));
        //创建并构造OpenSearch对象
        OpenSearch openSearch = new OpenSearch(accesskey, secret, host);
        //创建OpenSearchClient对象，并以OpenSearch对象作为构造参数
        OpenSearchClient serviceClient = new OpenSearchClient(openSearch);
        //创建SearcherClient对象，并以OpenSearchClient对象作为构造参数
        SearcherClient searcherClient = new SearcherClient(serviceClient);
        //定义Config对象，用于设定config子句参数，分页或数据返回格式，指定应用名等等
        Config config = new Config(Lists.newArrayList(appName));
        config.setStart(0);
        config.setHits(5);
        //设置返回格式为json，3.1.2 sdk只支持返回xml和json格式，暂不支持返回fulljson类型，3.1.3版本支持fulljson
        config.setSearchFormat(SearchFormat.JSON);
        // 创建参数对象
        SearchParams searchParams = new SearchParams(config);
        // 设置查询子句，若需多个索引组合查询，需要setQuery处合并，否则若设置多个setQuery后面的会替换前面查询
        Suggest sug = new Suggest();
        sug.setSuggestName("suggest");
        searchParams.setSuggest(sug);//searchParams对象添加下拉对象
        searchParams.setQuery("nihao");//在控制台中下拉列表中如果能搜出"nihao"，这里也能够搜出
        // SearchParams的工具类，提供了更为便捷的操作
        SearchParamsBuilder paramsBuilder = SearchParamsBuilder.create(searchParams);
        // 执行返回查询结果
        SearchResult searchResult;
        try {
            searchResult = searcherClient.execute(paramsBuilder);
            String result = searchResult.getResult();
            JSONObject obj = new JSONObject(result);
            //判断执行返回是否成功，如果报错执行下面代码，否者输出正确查询内容
            if(obj.has("errors")){
                JSONArray jsonarr = JSONArray.parseArray(obj.get("errors").toString());
                System.out.println("error code:"+jsonarr.getJSONObject(0).get("code"));
                System.out.println("error message:"+jsonarr.getJSONObject(0).get("message"));
            }else{
                // 输出查询结果
                System.out.println("output:"+obj.toString());
                //个别用户可能需要debug请求地址信息
                SearchResultDebug srd = searcherClient.executeDebug(searchParams);
                System.out.println(srd.getRequestUrl().toString());
            }
        } catch (OpenSearchException e) {
            e.printStackTrace();
        } catch (OpenSearchClientException e) {
            e.printStackTrace();
        }
    }
}