java操作elasticsearch实现query String

1、CommonTersQuery: 指定字段进行模糊查询

//commonTermsQuery
@Test
public void test35() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    QueryBuilder builder = QueryBuilders.commonTermsQuery("name","zhaoliu");
    SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();
    SearchHits hits = response.getHits();
    for(SearchHit hit:hits) {
        System.out.println(hit.getSourceAsString());
        //将获取的值转换成map的形式
        Map<String, Object> map = hit.getSourceAsMap();
        for(String key:map.keySet()) {
            System.out.println(key +" key对应的值为：" +map.get(key));
        }
    }
}

2、queryStringQuery：

　　说明：根据值去每个字段进行模糊查询 +代表必须含有  -代表不能含有

//queryStringQuery  根据值去每个字段进行模糊查询 +代表必须含有  -代表不能含有
@Test
public void test36() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //查询文档中含必须含有changge，不含有hejiu的文档（会每个字段去查询）+代表必须含有  -代表不能含有
    QueryBuilder builder = QueryBuilders.queryStringQuery("+changge  -hejiu");
    SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();
    SearchHits hits = response.getHits();
    for(SearchHit hit:hits) {
        System.out.println(hit.getSourceAsString());
        //将获取的值转换成map的形式
        Map<String, Object> map = hit.getSourceAsMap();
        for(String key:map.keySet()) {
            System.out.println(key +" key对应的值为：" +map.get(key));
        }
    }
}

3、simpleQueryStringQuery  

　　说明：根据值去每个字段进行模糊查询 只要有一个符合就会返回该文章

//simpleQueryStringQuery  根据值去每个字段进行模糊查询 只要有一个符合就会返回该文章
@Test
public void test37() throws UnknownHostException{
    //1、指定es集群  cluster.name 是固定的key值，my-application是ES集群的名称
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
    //2.创建访问ES服务器的客户端
    TransportClient client = new PreBuiltTransportClient(settings)
            .addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.1.94"), 9300));
    //只要所有字段中，含有changge或hejiui的都返回
    QueryBuilder builder = QueryBuilders.simpleQueryStringQuery("changge  hejiu");
    SearchResponse response = client.prepareSearch("lib3").setQuery(builder).get();
    SearchHits hits = response.getHits();
    for(SearchHit hit:hits) {
        System.out.println(hit.getSourceAsString());
        //将获取的值转换成map的形式
        Map<String, Object> map = hit.getSourceAsMap();
        for(String key:map.keySet()) {
            System.out.println(key +" key对应的值为：" +map.get(key));
        }
    }
}

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