ElasticSearch（Settings,Mappings）

叁歲伎倆 2022-06-06 06:37 142阅读 0赞

## ElasticSearch（Settings,Mappings） ##

**1.Setting** 是 针对于索引库而言  
可以设置索引库的**分片数量** 和 **副本数量**

url 的方式 设置和修改

"settings": {
            "number_of_shards": 5,
            "number_of_replicas": 1

api 前面在创建索引库的时候已经讲过了，就不重复了

**2.Mappings**相当于数据库中对字段的类型约束 以及 **某些字段查询时指定分词器**  
具体解释请看官网  
包含数据类型 (text,keyword,date,long,interger……………)  
别的不多说了 看下我创建的mapping

"mappings": {
            "user": {
       //映射类型
                "properties": {
       //定义字段
                    "title": {
                        "type": "text",//字段类型
                        "analyzer": "ik_max_word",
                        "search_analyzer": "ik_max_word"//查询分词
                    },
                    "name": {
                        "type": "text"
                    },
                    "age": {
                        "type": "long"
                    }
                }
            },
            "blog": {
                "properties": {
                    "title": {
                        "type": "text",
                        "analyzer": "ik_max_word",
                        "search_analyzer": "ik_max_word"
                    },
                    "content": {
                        "type": "text",
                        "analyzer": "ik_max_word",
                        "search_analyzer": "ik_max_word"
                    }
                }
            }
        }

**创建Mapping的javaApi**

// 以XContentBuilder形式
       XContentBuilder builder = XContentFactory.jsonBuilder()
                 .startObject()
                    .startObject("properties")
                        .startObject("name")
                            .field("type", "text")
                        .endObject()
                        .startObject("title")
                            .field("type", "text")
                            .field("analyzer", "ik_max_word")
                            .field("search_analyzer", "ik_max_word")
                        .endObject()
                    .endObject()
                 .endObject();
            PutMappingResponse response = client.admin().indices().preparePutMapping()
                    .setIndices("dragon").setType("ccc")
                    .setSource(builder).get();
            System.out.println(response.isAcknowledged());
    
    
    
    
    
    
    
    //以json形式： 要注意要指定type  setType  
    josn文件:  { "properties": {
                    "title": {
                        "type": "text",
                        "analyzer": "ik_max_word",
                        "search_analyzer": "ik_max_word"
                    },
                    "name": {
                        "type": "text"
                    },
                    "age": {
                        "type": "long"
                    }
                }}
    
      String json ="{ \"properties\": {\n" +
                    " \"title\": {\n" +
                    " \"type\": \"text\",\n" +
                    " \"analyzer\": \"ik_max_word\",\n" +
                    " \"search_analyzer\": \"ik_max_word\"\n" +
                    " },\n" +
                    " \"name\": {\n" +
                    " \"type\": \"text\"\n" +
                    " },\n" +
                    " \"age\": {\n" +
                    " \"type\": \"long\"\n" +
                    " }\n" +
                    " }}";
            byte[] bytes = json.getBytes();
            PutMappingResponse response = client.admin().indices()
                    .preparePutMapping("dragon").setType("aaa")
                    .setSource(json, XContentType.JSON).get();
    
            System.out.println(response.isAcknowledged());
        }

我创建 一个索引库这样来:

curl -XPUT 'localhost:9200/索引库名' -d ' { "settings": { "number_of_shards": 5, "number_of_replicas": 1 }, "mappings": { "user": { "properties": { "title": { "type": "text", "analyzer": "ik_max_word", "search_analyzer": "ik_max_word" }, "name": { "type": "text" }, "age": { "type": "long" } } }, "blog": { "properties": { "title": { "type": "text", "analyzer": "ik_max_word", "search_analyzer": "ik_max_word" }, "content": { "type": "text", "analyzer": "ik_max_word", "search_analyzer": "ik_max_word" } } } } } '  //别忘了这个

ElasticSearch（Settings,Mappings）

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