Elasticsearch JavaApi

官网JavaApi地址：https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-search.html

博客：http://blog.csdn.net/molong1208/article/details/50512149

1.创建索引与数据

把json字符写入索引，索引库名为twitter、类型为tweet,id为1

语法

import static org.elasticsearch.common.xcontent.XContentFactory.*;

IndexResponse response = client.prepareIndex("twitter", "tweet", "1")
        .setSource(jsonBuilder()
                    .startObject()
                        .field("user", "kimchy")
                        .field("postDate", new Date())
                        .field("message", "trying out Elasticsearch")
                    .endObject()
                  )
        .get();

相关用例

 public static boolean create(String index, String type, @Nullable String id,String json){

         //index:索引库名
         //type:类型
         //id:文档的id
         //json:json字符串
         //response.isCreated()：创建是否成功
         IndexResponse response = client.prepareIndex(index, type, id)
 //                .setSource("{ \"title\": \"Mastering ElasticSearch\"}")
                 .setSource(json)
                 .execute().actionGet();

         return response.isCreated();

     }

2.删除索引与数据

索引库名为twitter、类型为tweet,id为1

语法

DeleteResponse response = client.prepareDelete("twitter", "tweet", "1").get();

相关用例

     public static boolean remove(String index, String type, String id){

         //index:索引库名
         //type:类型
         //id:文档的id
         //response.isFound():是否删除成功
         DeleteResponse response = client.prepareDelete(index, type, id).get();

         return response.isFound();

     }

3.修改数据

你可以创建一个UpdateRequest并将其发送到客户端:

UpdateRequest updateRequest = new UpdateRequest();
updateRequest.index("index");
updateRequest.type("type");
updateRequest.id("1");
updateRequest.doc(jsonBuilder()
        .startObject()
            .field("gender", "male")
        .endObject());
client.update(updateRequest).get();

相关用例

     public static boolean update(String index, String type, String id,XContentBuilder endObject)
             throws IOException, InterruptedException, ExecutionException{

 //        XContentBuilder endObject = XContentFactory.jsonBuilder()
 //        .startObject()
 //            .field("name", "jackRose222")
 //            .field("age", 28)
 //            .field("address","上海徐家汇")
 //        .endObject();

         //index:索引库名
         //type:类型
         //endObject:使用JSON格式返回内容生成器

         UpdateRequest updateRequest = new UpdateRequest();
         updateRequest.index(index);
         updateRequest.type(type);
         updateRequest.id(id);
         updateRequest.doc(endObject);
         UpdateResponse updateResponse = client.update(updateRequest).get();

         return updateResponse.isCreated();

     }

也可以用prepareUpdate()方法

client.prepareUpdate("ttl", "doc", "1")
        .setDoc(jsonBuilder()
            .startObject()
                .field("gender", "male")
            .endObject())
        .get();

相关用例

     public static boolean update2(String index, String type, String id,
             Map<String,Object> fieldMap) throws IOException, InterruptedException, ExecutionException{

         //index:索引库名
         //type:类型
         //endObject:使用JSON格式返回内容生成器

         //使用JSON格式返回内容生成器
         XContentBuilder xcontentbuilder = XContentFactory.jsonBuilder();        

         if(fieldMap!=null && fieldMap.size() >0){
             xcontentbuilder.startObject();

             for (Map.Entry<String, Object> map : fieldMap.entrySet()) {
                 if(map != null){
                     xcontentbuilder.field(map.getKey(),map.getValue());
                 }
             }

             xcontentbuilder.endObject();

             UpdateResponse updateResponse = client.prepareUpdate(index, type, id)
                     .setDoc(xcontentbuilder)
                     .get();

                     return updateResponse.isCreated();
         }

         return false;                

     }

4.查询

4.1搜索API允许一个执行一个搜索查询,返回搜索结果匹配的查询。它可以跨越一个或多个指标和执行一个或多个类型。查询可以使用查询提供的Java API。搜索请求的主体使用SearchSourceBuilder构建。这是一个例子:

import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.search.SearchType;
import org.elasticsearch.index.query.QueryBuilders.*;

SearchResponse response = client.prepareSearch("index1", "index2")
        .setTypes("type1", "type2")
        .setSearchType(SearchType.DFS_QUERY_THEN_FETCH)
        .setQuery(QueryBuilders.termQuery("multi", "test"))                 // Query
        .setPostFilter(QueryBuilders.rangeQuery("age").from(12).to(18))     // Filter
        .setFrom(0).setSize(60).setExplain(true)
        .get();

请注意,所有参数都是可选的。这是最小的搜索你可以写

// MatchAll on the whole cluster with all default options
SearchResponse response = client.prepareSearch().get();

尽管Java API定义了额外的搜索类型QUERY_AND_FETCH DFS_QUERY_AND_FETCH,这些模式内部优化和不应该由用户显式地指定的API。

相关用例

     public static SearchResponse search(String index, String type) {

         // 查询全部
         // SearchResponse response2 =
         // client.prepareSearch().execute().actionGet();

         // 按照索引与类型查询
         //index:索引库名
         //type:类型
         SearchResponse response = client.prepareSearch(index).setTypes(type)
                 // .setSearchType(SearchType.DFS_QUERY_THEN_FETCH)
                 // .setQuery(QueryBuilders.termQuery("multi", "test")) // Query
                 // .setFrom(0)
                 // .setSize(5)
                 // .setExplain(true)
                 .execute().actionGet();
         return response;
     }

4.2多条件查询

http://blog.csdn.net/zx711166/article/details/77847120

 public class EsBool{
     public void BoolSearch(TransportClient client){
         //多条件设置
         MatchPhraseQueryBuilder mpq1 = QueryBuilders
             .matchPhraseQuery("pointid","W3.UNIT1.10LBG01CP301");
         MatchPhraseQueryBuilder mpq2 = QueryBuilders
             .matchPhraseQuery("inputtime","2016-07-21 00:00:01");
         QueryBuilder qb2 = QueryBuilders.boolQuery()
                                 .must(mpq1)
                                 .must(mpq2);
         SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
         sourceBuilder.query(qb2);
         //System.out.println(sourceBuilder.toString());

         //查询建立
         SearchRequestBuilder responsebuilder = client
                 .prepareSearch("pointdata").setTypes("pointdata");
         SearchResponse myresponse=responsebuilder
                     .setQuery(qb2)
                     .setFrom(0).setSize(50)
                     .addSort("inputtime", SortOrder.ASC)
                     //.addSort("inputtime", SortOrder.DESC)
                     .setExplain(true).execute().actionGet();
             SearchHits hits = myresponse.getHits();
             for(int i = 0; i < hits.getHits().length; i++) {
                 System.out.println(hits.getHits()[i].getSourceAsString());

             }
     }
 }