Elasticsearch java client 获取mapping

一、获取索引的所有mapping

通过java客户端获取mapping：

package elasticsearch.in.action.client;

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.cluster.metadata.MappingMetaData;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;

public class TransClient {
    public static String clusterName = "elasticsearch";// 集群名称
    public static String serverIP = "127.0.0.1";// 服务器IP
    public static void main(String[] args) {
        System.out.println(getMapping("news", "sportnews"));
    }

    public static String getMapping(String indexname, String typename) {
        Settings settings = Settings.settingsBuilder().put("cluster.name", clusterName).build();
        String mapping="";
        try {
            TransportClient client = TransportClient.builder().settings(settings).build()
                    .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(serverIP), 9300));

            ImmutableOpenMap mappings = client.admin().cluster().prepareState().execute()
                    .actionGet().getState().getMetaData().getIndices().get(indexname).getMappings();
            mapping = mappings.get(typename).source().toString();


            client.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }

        return mapping;
    }

}

二、获取所有的type以及每个type的mapping

mapping信息都是ImmutableOpenMap

for (ObjectObjectCursor cursor : mappings) {
            System.out.println(cursor.key); // 索引下的每个type
            System.out.println(cursor.value.getSourceAsMap()); // 每个type的mapping
}