ElasticSearch Java API 与 ElasticsearchTemplate

Question

使用 ElasticSearchTemplate 我可以轻松地从一个简单的实体创建索引 class。假设我要保存 Book.java:

@Document(indexName = "bookshop", type = "book", shards = 2, replicas = 2, refreshInterval = "-1")
public class Book {

    @Id
    private String id;
    @Field(type = FieldType.String, store = true)
    private String title;
}

这就足够了：

    elasticsearchTemplate.createIndex(Book.class);
    elasticsearchTemplate.putMapping(Book.class);
    elasticsearchTemplate.refresh(Book.class);

这可以用纯 ES Java API 实现，而没有 spring-data-elasticsearch 和字符串操作（JSON）吗？

Answer 1

其实JavaAPI需要JSON但是有EShelpers所以代码可以如下：

CreateIndexResponse createIndexRequestBuilder = client().admin().indices()
                .prepareCreate(INDEX_NAME)
                .setSource(XContentFactory.jsonBuilder()
                        .startObject()
                        .field("title", "My Title 1")
                        .endObject()
                )
                .setSettings(
                        Settings.settingsBuilder()
                                .put("index.number_of_shards", 2)
                                .put("index.number_of_replicas", 2)
                )
                .execute()
                .actionGet();