ES搜索工具

src/main/scala/tools/es/ESUtils.scala

+package tools.es
+
+import org.elasticsearch.action.delete.{DeleteRequest, DeleteResponse}
+import org.elasticsearch.action.get.{GetRequest, GetResponse}
+import org.elasticsearch.action.index.{IndexRequest, IndexResponse}
+import org.elasticsearch.action.search.SearchRequest
+import org.elasticsearch.action.update.{UpdateRequest, UpdateResponse}
+import org.elasticsearch.client.indices.GetIndexRequest
+import org.elasticsearch.client.{RequestOptions, RestHighLevelClient}
+import org.elasticsearch.common.unit.{Fuzziness, TimeValue}
+import org.elasticsearch.common.xcontent.XContentType
+import org.elasticsearch.index.query.QueryBuilders
+import org.elasticsearch.search.builder.SearchSourceBuilder
+import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder
+import org.elasticsearch.search.sort.SortOrder
+import org.elasticsearch.search.{SearchHit, SearchHits}
+import tools.properties.PropertiesTools
+
+import java.io.IOException
+import java.util.Properties
+import java.util.concurrent.TimeUnit
+
+
+/**
+ * @ClassName: ESUtil
+ * @Description: ES的工具类，实现ES的增删查改
+ * @Create by: LinYang
+ * @Date: 2020/12/17 15:27
+ */
+
+object ESUtils {
+
+  private[this] val sourceBuilder = new SearchSourceBuilder
+  private[this] var searchRequest: SearchRequest = _
+  private[this] val client: RestHighLevelClient = ESClient.getClient
+  private[this] val properties: Properties = PropertiesTools.getProperties
+  private[this] val indexName: String = properties.getProperty("es.indices")
+
+  //增
+  /**
+   * 添加数据到ES，指定索引名和id
+   *
+   * @param id      id
+   * @param content 要添加的内容，格式为json
+   */
+  def addOne(id: String,
+             content: String): String = {
+    val indexRequest = new IndexRequest(indexName)
+    indexRequest.id(id)
+    indexRequest.source(content, XContentType.JSON)
+    var response: IndexResponse = null
+    try {
+      response = client.index(indexRequest, RequestOptions.DEFAULT)
+    } catch {
+      case e: IOException => e.printStackTrace()
+    }
+    response.getResult.toString
+  }
+
+  //删
+  /**
+   * 删除索引
+   *
+   * @return 是否删除成功
+   */
+  def deleteIndex(): String = {
+    val deleteRequest = new DeleteRequest(indexName)
+    val response = client.delete(deleteRequest, RequestOptions.DEFAULT)
+    response.getResult.toString
+  }
+
+
+  /**
+   * 删除指定的数据
+   *
+   * @param id 数据id
+   * @return 删除结果
+   */
+  def deleteDoc(id: String): String = {
+    val request = new DeleteRequest(indexName, id)
+    val response: DeleteResponse = client.delete(request, RequestOptions.DEFAULT)
+    response.getResult.toString
+  }
+
+  //改
+
+  /**
+   * 修改指定文件的数据
+   *
+   * @param id      指定id
+   * @param content 修改的内容
+   * @return 返回修改结果
+   */
+  def updateIndex(id: String, content: String, routing: String): String = {
+    val request = new UpdateRequest(indexName, id).doc(content, XContentType.JSON).routing(routing)
+    var response: UpdateResponse = null
+    try {
+      response = client.update(request, RequestOptions.DEFAULT)
+      response.getResult.toString
+    } catch {
+      case exception: Exception => ""
+    }
+  }
+
+
+  //查
+  /**
+   * 查询指定的索引是否存在
+   *
+   * @return 返回是否存在
+   */
+  def indexExists(): Boolean = {
+    var exits: Boolean = false
+    try {
+      val request: GetIndexRequest = new GetIndexRequest(indexName)
+      exits = client.indices.exists(request, RequestOptions.DEFAULT)
+    } catch {
+      case e: Exception => e.printStackTrace()
+    }
+    exits
+  }
+
+  /**
+   * 通过id获取一个文档
+   *
+   * @param id id
+   * @return 搜索结果
+   */
+  def getById(id: String): GetResponse = {
+    val getRequest = new GetRequest(indexName, id)
+    client.get(getRequest, RequestOptions.DEFAULT)
+  }
+
+  /**
+   * 无条件查询指定索引
+   *
+   * @param size 取出多少条数据
+   * @return 返回长度为size的搜索结果数组
+   */
+  def searchAll(size: Int): Array[SearchHit] = {
+
+    if (!indexExists) {
+      return null
+    }
+
+    searchRequest = new SearchRequest(indexName)
+    //构建查询
+    val queryBuilder = QueryBuilders.matchAllQuery()
+    //查询
+    sourceBuilder
+      .query(queryBuilder)
+      .timeout(new TimeValue(60, TimeUnit.SECONDS))
+      .size(size)
+    searchRequest.source(sourceBuilder)
+    //搜索
+    val response = client.search(searchRequest, RequestOptions.DEFAULT)
+    response.getHits.getHits
+  }
+
+  /**
+   * 根据字段精准匹配 term
+   *
+   * @param fieldName 字段名
+   * @param text      匹配的值
+   * @param size      取出的条数
+   * @return 返回搜索结果,长度为size的结果数组
+   */
+  def termMatching(fieldName: String, text: AnyRef): SearchHits = {
+    if (!indexExists) {
+      return null
+    }
+    searchRequest = new SearchRequest(indexName)
+    val termQueryBuilder = QueryBuilders.termQuery(fieldName, text)
+    sourceBuilder.query(termQueryBuilder)
+    searchRequest.source(sourceBuilder)
+    val response = client.search(searchRequest, RequestOptions.DEFAULT)
+
+    response.getHits
+  }
+
+  /**
+   * 根据指定索引字段模糊匹配
+   *
+   * @param fieldName 字段名字
+   * @param text      匹配文本
+   * @param size      取出的长度
+   * @param sortField 排序字段
+   * @param sortOrder 排序方式
+   *                  升序:SortOrder.ASC,
+   *                  降序:SortOrder.DESC
+   * @return 返回size长度的结果数组
+   */
+  def fuzzyMatching(fieldName: String, text: AnyRef, size: Int, sortField: String, sortOrder: SortOrder): Array[SearchHit] = {
+    if (!indexExists) {
+      return null
+    }
+    searchRequest = new SearchRequest(indexName)
+    val matchQueryBuilder = QueryBuilders.matchQuery(fieldName, text)
+      .fuzziness(Fuzziness.AUTO)
+      .prefixLength(3)
+      .maxExpansions(10)
+    sourceBuilder.query(matchQueryBuilder)
+      .timeout(new TimeValue(60, TimeUnit.SECONDS))
+      .size(size)
+    searchRequest.source(sourceBuilder)
+    val response = client.search(searchRequest, RequestOptions.DEFAULT)
+    response.getHits.getHits
+  }
+
+
+  /**
+   * 根据指定的多字段进行模糊匹配
+   *
+   * @param size       取出的长度
+   * @param text       匹配的文本
+   * @param fieldNames 字段名
+   * @return 返回结果的数组
+   */
+  def multiFuzzyMatching(size: Int, text: Any, fieldNames: String*): SearchHits = {
+    // 多字段匹配
+    if (!indexExists) {
+      return null
+    }
+    searchRequest = new SearchRequest(indexName)
+    val multiMatchQueryBuilder = QueryBuilders.multiMatchQuery(text, fieldNames: _*)
+      .fuzziness(Fuzziness.AUTO)
+      .maxExpansions(10)
+      .prefixLength(3)
+    sourceBuilder.query(multiMatchQueryBuilder).size(size)
+    searchRequest.source(sourceBuilder)
+    val response = client.search(searchRequest, RequestOptions.DEFAULT)
+
+    response.getHits
+  }
+
+  //复合查询
+  def boolQuery(source: String,
+                name: String,
+                price: Double,
+                value: Any,
+                size: Int): SearchHits = {
+    searchRequest = new SearchRequest(indexName)
+    val boolQueryBuilder = QueryBuilders.boolQuery
+      //精准查询source字段的值，filedName写‘source’，source写‘淘宝’、‘拼多多’……
+      .must(QueryBuilders.matchQuery("source", source))
+      //
+      .must(QueryBuilders.rangeQuery("price").gte(price * 0.8))
+      //匹配item_name字段的值
+      .should(QueryBuilders.matchQuery(name, value))
+
+    sourceBuilder.query(boolQueryBuilder).size(size)
+    searchRequest.source(sourceBuilder)
+
+    val highlightBuilder = new HighlightBuilder
+
+    highlightBuilder.field("item_name", 10)
+      .preTags("<")
+      .postTags(">")
+
+    sourceBuilder.highlighter(highlightBuilder)
+
+    val response = client.search(searchRequest, RequestOptions.DEFAULT)
+
+    response.getHits
+
+  }
+}