es官方go客户端创建ik索引并进行查询操作

es-go client引入gomod

go get github.com/elastic/go-elasticsearch/v8@latest

连接es服务器（不经过安全校验)

cfg := elasticsearch.Config{Addresses: []string{"http://localhost:9200",},
}
es, err := elasticsearch.NewClient(cfg)
if err != nil {panic(err)
}

创建索引

func createIndex(es *elasticsearch.Client) {// 创建索引的 JSON 配置indexName := "my_index"indexMapping := map[string]interface{}{"settings": map[string]interface{}{"analysis": map[string]interface{}{"analyzer": map[string]interface{}{"ik_analyzer": map[string]interface{}{"type":      "custom","tokenizer": "ik_max_word",},},},},"mappings": map[string]interface{}{"properties": map[string]interface{}{"title": map[string]interface{}{"type":     "text","analyzer": "ik_analyzer",},"content": map[string]interface{}{"type":     "text","analyzer": "ik_analyzer",},},},}// 将索引配置转换为 JSON 字符串indexMappingJSON, err := json.Marshal(indexMapping)if err != nil {log.Fatalf("Error marshaling the index mapping: %s", err)}// 创建索引请求req := esapi.IndicesCreateRequest{Index: indexName,Body:  strings.NewReader(string(indexMappingJSON)),}// 发送请求res, err := req.Do(context.Background(), es)if err != nil {log.Fatalf("Error creating the index: %s", err)}defer res.Body.Close()// 检查响应if res.IsError() {log.Fatalf("Error creating the index: %s", res.String())}fmt.Printf("Index created: %s\n", res.String())
}

校验索引分词效果是否生效

func use_analyze(es *elasticsearch.Client) {// 分词测试的 JSON 配置analyzeRequest := map[string]interface{}{"text":     "今天天气真好，适合出去玩","analyzer": "ik_analyzer",}// 将分词请求转换为 JSON 字符串analyzeRequestJSON, err := json.Marshal(analyzeRequest)if err != nil {log.Fatalf("Error marshaling the analyze request: %s", err)}// 创建分词请求req := esapi.IndicesAnalyzeRequest{Index: "my_index",Body:  strings.NewReader(string(analyzeRequestJSON)),}// 发送请求res, err := req.Do(context.Background(), es)if err != nil {log.Fatalf("Error analyzing the text: %s", err)}defer res.Body.Close()// 检查响应if res.IsError() {log.Fatalf("Error analyzing the text: %s", res.String())}// 解析响应var result map[string]interface{}if err := json.NewDecoder(res.Body).Decode(&result); err != nil {log.Fatalf("Error parsing the response: %s", err)}// 输出分词结果fmt.Printf("Tokens: %+v\n", result["tokens"])
}

插入或者更新数据并查询

func insertAndSearch(es *elasticsearch.Client) {// 插入文档doc := map[string]interface{}{"title":   "测试文档","content": "今天天气真好，适合出去玩",}docJSON, err := json.Marshal(doc)if err != nil {log.Fatalf("Error marshaling the document: %s", err)}req := esapi.IndexRequest{Index:      "my_index",DocumentID: "1",Body:       strings.NewReader(string(docJSON)),}res, err := req.Do(context.Background(), es)if err != nil {log.Fatalf("Error indexing the document: %s", err)}defer res.Body.Close()if res.IsError() {log.Fatalf("Error indexing the document: %s", res.String())}fmt.Printf("Document indexed: %s\n", res.String())// 查询文档query := map[string]interface{}{"query": map[string]interface{}{"match": map[string]interface{}{"content": "天气",},},}queryJSON, err := json.Marshal(query)if err != nil {log.Fatalf("Error marshaling the query: %s", err)}searchReq := esapi.SearchRequest{Index: []string{"my_index"},Body:  strings.NewReader(string(queryJSON)),}searchRes, err := searchReq.Do(context.Background(), es)if err != nil {log.Fatalf("Error searching the document: %s", err)}defer searchRes.Body.Close()if searchRes.IsError() {log.Fatalf("Error searching the document: %s", searchRes.String())}var searchResult map[string]interface{}if err := json.NewDecoder(searchRes.Body).Decode(&searchResult); err != nil {log.Fatalf("Error parsing the search response: %s", err)}fmt.Printf("Search results: %+v\n", searchResult)println("search res:", searchRes.String())
}

综上就完成了es go客户端操作es服务器的相关操作