這邊沒有提供安裝es的流程,網上能夠找一下。在個人csdn上早就有這篇文章了,我如今搬過來作了一些修改,這邊的文章較爲徹底,其中貼的代碼,大部分不是項目中的,是我練習時的代碼,少部分是貼的項目中的。若是要看此文章,仍是要建議要達到本身練習過原生語法,本身能夠搭建一個kibana去練習。新手的話,能夠去看看狂神的視頻,我的以爲能夠的。公司項目中須要用到es,當時沒用過,直接上手了es 的最新版。而後發現項目中springboot版本比較低,常常報錯,而後又小小的學習了一下,新版的es相比較舊版(目前用的包 6.4的clint)的話,有些參數必需要。其中_type 這個參數必需要的,可是我感受用處也不是很大。歡迎指定,一塊兒學習!javascript
這裏只貼了我在項目中封裝的crud,這是最開始封裝的,並無很完美,但足以拿去直接使用。後續想改,但要動不少,就暫時沒改。前端
@Slf4j
public class EsSearchUtils {
private static RestHighLevelClient restHighLevelClient = SpringUtils.getBean(RestHighLevelClient.class);
// 用於查詢全部根節點
@Getter
private static List<Integer> proTypeIdList = new ArrayList<>();
/** * es添加的方法 * * @return */
public static <T> boolean add(String indexName, T entity) {
IndexRequest indexRequest = new IndexRequest(indexName);
indexRequest.type("_doc");
indexRequest.source(JSON.toJSONString(entity), XContentType.JSON);
// indexRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
// indexRequest.setRefreshPolicy("1s");
// WriteRequest.RefreshPolicy refreshPolicy = indexRequest.getRefreshPolicy();
// String value = refreshPolicy.getValue();
// System.out.println("添加是否開啓了不延遲:"+value);
try {
restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * es更新的方法 * * @return */
public static <T> boolean update(String indexName, T entity, String _id) {
UpdateRequest updateRequest = new UpdateRequest(indexName, "_doc", _id);
updateRequest.doc(JSON.toJSONString(entity), XContentType.JSON);
// updateRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
try {
restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * es刪除的方法 * * @return */
public static boolean delete(String indexName, String _id) {
DeleteRequest deleteRequest = new DeleteRequest(indexName, "_doc", _id);
// deleteRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
try {
restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/** * 封裝es查詢 操做 * * @param queryBuilder * @param searchRequest * @param sortName 須要排序的字段名 默認降序 * @param page 第幾頁 * @param pageSize 每頁的條數 */
public static List<Map<String, Object>> searchList(QueryBuilder queryBuilder, String[] searchArray, SearchRequest searchRequest, String sortName, Integer page, Integer pageSize) {
//構建構造者
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.timeout(TimeValue.timeValueMillis(2000));
// 限制字段(前者是你想要什麼字段,後者是排除什麼字段)
if (null != searchArray) {
// searchSourceBuilder.fetchSource(searchArray, new String[]{});
searchSourceBuilder.fetchSource(searchArray, null);
}
// 分頁條件
if (!"".equals(page) && null != page) {
if (page < 0) {
page = 0;
}
searchSourceBuilder.from(page);
}
// 分頁條件
if (!"".equals(pageSize) && null != pageSize) {
if (pageSize <= 0) {
pageSize = 1;
}
searchSourceBuilder.size(pageSize);
} else {
// 目前設置1萬條
searchSourceBuilder.size(10000);
}
// 排序條件
if (!"".equals(sortName) && null != sortName) {
searchSourceBuilder.sort(sortName, SortOrder.DESC);
}
// 查詢條件
if (null != queryBuilder) {
searchSourceBuilder.query(queryBuilder);
}
//這裏是針對關鍵字高亮。其實就是將前端代碼放在了這裏
//searchSourceBuilder.highlighter().preTags("<p class='one' style='color:red'>").postTags("</p>").field("content");
SearchRequest source = searchRequest.source(searchSourceBuilder);
SearchResponse search = null;
try {
search = restHighLevelClient.search(source, RequestOptions.DEFAULT);
} catch (Exception e) {
e.printStackTrace();
search = null;
log.info("============查詢出現異常=========");
}
List<Map<String, Object>> list = new ArrayList<>();
if (null != search) {
for (SearchHit hit : search.getHits().getHits()) {
Map<String, Object> sourceAsMap = hit.getSourceAsMap();
sourceAsMap.put("_id", hit.getId());
sourceAsMap.put("_score", hit.getScore());
list.add(sourceAsMap);
}
}
return list;
}
}
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直接上手api吧,ElasticSearchCommon 是本身將全部的索引名字封裝出來的,這裏是只須要一個字符串的! 提早準備的話:導入springboot封裝事後的es(也能夠不用這樣)依賴。而後寫一下配置類,配置類我貼出來,再注入一下java
依賴
spring
<!-- elasticsearchs -->
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> </dependency>
<dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> </dependency>
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配置類
sql
@Configuration
public class ElasticSearchConfig {
@Bean
public RestHighLevelClient restHighLevelClient(){
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost(ip,端口,"http")
)
);
return client;
}
}
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哪些地方要使用就把RestHighLevelClient注入過來
api
@Autowired
// 1.指定方法名
@Qualifier("restHighLevelClient")
private RestHighLevelClient restHighLevelClient;
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// 建立索引請求
CreateIndexRequest createIndex = new CreateIndexRequest(ElasticSearchCommon.LG_SESSION);
// 客戶端執行請求
CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(createIndex, RequestOptions.DEFAULT);
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DeleteIndexRequest deletRequest = new DeleteIndexRequest(ElasticSearchCommon.LG_SESSION);
AcknowledgedResponse delete = restHighLevelClient.indices().delete(deletRequest, RequestOptions.DEFAULT);
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GetIndexRequest getIndexRequest = new GetIndexRequest(ElasticSearchCommon.LG_SESSION);
boolean exists = restHighLevelClient.indices().exists(getIndexRequest, RequestOptions.DEFAULT);
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IndexRequest indexRequest = new IndexRequest(ElasticSearchCommon.LG_SESSION);
// 版本低一點的話須要加上type類型
indexRequest.type("本身定義的類型");
SessionEntity sessionEntity = new SessionEntity();
sessionEntity.setId(1);
sessionEntity.setConversationTime(getNowTime());
sessionEntity.setMsgState(1);
sessionEntity.setAddrImages("/addr/images");
sessionEntity.setVipId("VIP545465");
sessionEntity.setCustomerServerName("弟弟1號");
IndexRequest source = indexRequest.source(JSON.toJSONString(sessionEntity), XContentType.JSON);
IndexResponse index = restHighLevelClient.index(source, RequestOptions.DEFAULT);
System.out.println("預留內容添加狀態:"+index.status());
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// 建立請求
BulkRequest bulkRequest = new BulkRequest(ElasticSearchCommon.LG_SESSION);
// 建立批量數據
List<ProblemTypeEntity> list = new ArrayList<ProblemTypeEntity>();
list.add(new ProblemTypeEntity(1,"111"));
list.add(new ProblemTypeEntity(2,"222"));
list.add(new ProblemTypeEntity(3,"333"));
list.add(new ProblemTypeEntity(4,"444"));
list.add(new ProblemTypeEntity(5,"555"));
list.add(new ProblemTypeEntity(6,"666"));
list.add(new ProblemTypeEntity(7,"777"));
list.add(new ProblemTypeEntity(8,"888"));
// 循環添加
for (int i = 0;i<list.size();i++){
bulkRequest.add(
new IndexRequest(ElasticSearchCommon.LG_SESSION)
//.id(""+(i+1)) // 設置es 當中_id,不設置的話是一串字符
.source(JSON.toJSONString(list.get(i)),XContentType.JSON)
);
}
BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
System.out.println("循環添加的數據狀態:"+bulk.status());
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7.10版能夠這樣寫,根據其餘字段條件去查詢刪除,較新版本的刪除這我以爲是最方便的springboot
DeleteByQueryRequest deleteByQueryRequest = new DeleteByQueryRequest(ElasticSearchCommon.LG_PROBLEM);
DeleteByQueryRequest deleteByQueryRequest1 = deleteByQueryRequest.setQuery(QueryBuilders.termQuery("id", 12));
BulkByScrollResponse bulkByScrollResponse = restHighLevelClient.deleteByQuery(deleteByQueryRequest1, RequestOptions.DEFAULT);
System.out.println("刪除了幾條:"+bulkByScrollResponse.getStatus().getDeleted());
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老一點的版本,就必須帶上_type,我全部的都叫_type,目前沒感受到用處,目前探索到,刪除只能更具_id 去查詢markdown
DeleteRequest deleteRequest = new DeleteRequest(ElasticSearchCommon.LG_PROBLEM,"_doc","_id的值");
DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
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//第一種寫法
// 建立請求
UpdateRequest updateRequest = new UpdateRequest(ElasticSearchCommon.LG_SESSION,"這裏就是_id了");
// 建立須要更改的數據
UserEntity userEntity = new UserEntity("更改後的數據",28, CommonUtils.getTimeFormat());
// 修改的數據放入請求中
updateRequest.doc(JSON.toJSONString(userEntity),XContentType.JSON);
// 客戶端發送請求
UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
// 打印狀態
System.out.println("更新狀態:"+update.status());
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你要去了解QueryBuilders裏面的一些方法。session
*QueryBuilders.termQuery("key", obj) 徹底匹配,輸入的查詢內容是什麼,就會按照什麼去查詢,並不會解析查詢內容,對它分詞。
*QueryBuilders.termsQuery("key", obj1, obj2..) 一次匹配多個值
*QueryBuilders. matchQuery("key", Obj) 單個匹配,match查詢,會將搜索詞分詞,再與目標查詢字段進行匹配,若分詞中的任意一個詞與目標字段匹配上,則可查詢到。
*QueryBuilders. multiMatchQuery("text", "field1", "field2"..); 匹配多個字段, field有通配符忒行
*QueryBuilders. matchAllQuery(); 匹配全部文件
*QueryBuilders.matchPhraseQuery(「supplierName」,param);默認使用 match_phrase 時會精確匹配查詢的短語,須要所有單詞和順序要徹底同樣,標點符號除外
*QueryBuilders.wildcardQuery(「supplierName」,"*"+param+"*") ;條件wildcard不分詞查詢,加*(至關於sql中的%)表示模糊查詢,加keyword表示查不分詞數據
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builderList 我本身寫的操做es庫的一個方法;這裏和上面在項目中使用的封裝大體同樣,這裏名字換了一下,這個就作參考就好了,要在項目中使用的話,就用上面的 隨機一個方法:elasticsearch
SearchRequest searchRequest = new SearchRequest(ElasticSearchConstant.LG_PROBLEM);
MatchQueryBuilder should = QueryBuilders.matchQuery("content", content).operator(Operator.OR);
List<Map<String, Object>> list = builderList(should, searchRequest,null,0,5);
HashMap<String,Object> hashMap = new HashMap<String, Object>();
// 分詞未搜到則 返回熱度最高的5個數據
if (list.size() <= 0){
List<Map<String, Object>> heatList = MostHeat();
hashMap.put("heat","未查詢到關鍵詞,返回熱度最高的五個問題!");
heatList.add(0,hashMap);
return heatList;
}
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builderList方法:封裝的查詢 //構建構造者
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.timeout(TimeValue.timeValueMillis(1));
// 分頁條件
if (!"".equals(page) && null != page){
if (page < 0 ){
page = 0;
}
searchSourceBuilder.from(page);
}
// 分頁條件
if (!"".equals(pageSize) && null != pageSize){
if (pageSize <= 0 ){
pageSize = 1;
}
searchSourceBuilder.size(pageSize);
}
// 排序條件
if (!"".equals(sortName) && null != sortName){
searchSourceBuilder.sort(sortName, SortOrder.DESC);
}
// 查詢條件
if (null != queryBuilder ){
searchSourceBuilder.query(queryBuilder);
}
//searchSourceBuilder.highlighter().preTags("<p class='one' style='color:red'>").postTags("</p>").field("content");
SearchRequest source = searchRequest.source(searchSourceBuilder);
SearchResponse search = restHighLevelClient.search(source, RequestOptions.DEFAULT);
List<Map<String,Object>> list = new ArrayList<>();
for (SearchHit hit : search.getHits().getHits()) {
Map<String, Object> sourceAsMap = hit.getSourceAsMap();
sourceAsMap.put("_id",hit.getId());
//sourceAsMap.remove("addrImages");
list.add(sourceAsMap);
}
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customerName.keyword 表明不分詞搜索,總體搜索,徹底匹配 query.term,以前網上也是說不分詞搜索,歡迎大佬指定
仍是得本身去摸索着玩吧,這樣踩幾個坑就知道了,後續會更新其餘的。最重要就多在查詢上面花點心思,還有不少查詢未摸索到。這裏沒寫到ik,但項目中是使用到了的。es注意的地方,他的全部增刪改都不是及時的去刷新索引中的信息的,網上有不少說在3s 有的說在1s,我這邊感受大體是1s。能夠經過參數去把延遲刷新去除,若是頻繁的操做容易破壞索引和其餘緣由,暫時還不太清楚。