java创建mapping_ElasticSearch使用Java客户端创建索引index和映射mapping

可以使用Java客户端创建索引index和映射mapping，下面是示例代码：

import org.elasticsearch.action.admin.indices.create.CreateIndexRequest;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
import org.elasticsearch.action.admin.indices.mapping.put.PutMappingResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.mapper.ObjectMapper;
import org.elasticsearch.index.mapper.ObjectMapper.Builder;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class CreateIndexAndMapping {
    private RestHighLevelClient client;

    public CreateIndexAndMapping(RestHighLevelClient client) {
        this.client = client;
    }

    public void createIndex(String indexName) throws IOException {
        CreateIndexRequest request = new CreateIndexRequest(indexName);
        CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT);
        boolean acknowledged = response.isAcknowledged();
        if (acknowledged) {
            System.out.println("Index created successfully.");
        }
    }

    public void createMapping(String indexName, String typeName) throws IOException {
        PutMappingRequest request = new PutMappingRequest(indexName);
        request.type(typeName);

        XContentBuilder builder = XContentFactory.jsonBuilder();
        builder.startObject();
        {
            builder.startObject("properties");
            {
                builder.startObject("title");
                {
                    builder.field("type", "text");
                }
                builder.endObject();

                builder.startObject("author");
                {
                    builder.field("type", "text");
                }
                builder.endObject();

                builder.startObject("publish_date");
                {
                    builder.field("type", "date");
                }
                builder.endObject();

                builder.startObject("price");
                {
                    builder.field("type", "double");
                }
                builder.endObject();

                builder.startObject("description");
                {
                    builder.field("type", "text");
                }
                builder.endObject();
            }
            builder.endObject();
        }
        builder.endObject();

        request.source(builder);
        PutMappingResponse response = client.indices().putMapping(request, RequestOptions.DEFAULT);
        boolean acknowledged = response.isAcknowledged();
        if (acknowledged) {
            System.out.println("Mapping created successfully.");
        }
    }
}

上述代码中，`createIndex`方法用于创建索引，`createMapping`方法用于创建映射。在`createMapping`方法中，我们使用`XContentBuilder`来构建映射的JSON格式，然后将其作为请求的source进行设置。在这个例子中，我们定义了一个包含`title`、`author`、`publish_date`、`price`和`description`等字段的文档。