Java API操作ES 高级查询

1、 请求体查询

1.查询所有索引数据

/**
 * @author zhubayi
 * 请求体查询
 */
public class QueryBody {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");

        //构建查询的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //查询所有数据
        sourceBuilder.query(QueryBuilders.matchAllQuery());
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}

结果:

2.term 查询，查询条件为关键字

/**
 * @author zhubayi
 * term 查询，查询条件为关键字
 */
public class TermQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");

        //构建查询体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.termQuery("age", 30));
        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

结果:

3.分页查询

/**
 * @author zhubayi
 * 分页查询
 */
public class PageQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery());

        //分页查询
        // 当前页其实索引(第一条数据的顺序号)，from
        sourceBuilder.from(0);
        // 每页显示多少条 size
        sourceBuilder.size(2);
        request.source(sourceBuilder);
        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

4.数据排序

/**
 * @author zhubayi
 * 排序
 */
public class OrderQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery());

        //排序
        sourceBuilder.sort("age", SortOrder.DESC);
        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

结果:

5.过滤字段

/**
 * @author zhubayi
 * 过滤字段
 */
public class FilterQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery());

        //查询字段过滤
        String[] excludes={};
        String[] includes={"name","age"};
        sourceBuilder.fetchSource(includes,excludes);
        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

结果：

6.Bool 查询

/**
 * @author zhubayi
 * Bool查询
 */
public class BoolQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.matchAllQuery());

        //查询字段过滤
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        // 必须包含
        boolQueryBuilder.must(QueryBuilders.matchQuery("age",30));
        //一定不包含
        boolQueryBuilder.mustNot(QueryBuilders.matchQuery("name","zhangsan"));
        //可能包含
        boolQueryBuilder.should(QueryBuilders.matchQuery("sex","男"));

        sourceBuilder.query(boolQueryBuilder);
        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

结果：

7.范围查询

/**
 * @author zhubayi
 * 范围查询
 */
public class RangQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");

        //构建查询的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();

        //范围查询
        RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("age");
        rangeQuery.gte("30");
        rangeQuery.lte("40");
        sourceBuilder.query(rangeQuery);
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}

结果:

8.模糊查询

/**
 * @author zhubayi
 */
public class FuzzyQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.fuzzyQuery("name","zhangsan").fuzziness(Fuzziness.ONE));

        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            // 查询匹配
            SearchHits hits = response.getHits();
            System.out.println("took:" + response.getTook());
            System.out.println("timeout:" + response.isTimedOut());
            System.out.println("total:" + hits.getTotalHits());
            System.out.println("MaxScore:" + hits.getMaxScore());
            System.out.println("hits========>>");
            for (SearchHit hit : hits) {
                //输出每条查询的结果信息
                System.out.println(hit.getSourceAsString());
            }
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

2、高亮查询

/**
 * @author zhubayi
 * 高亮查询
 */
public class Test01 {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        //高亮查询
        SearchRequest request = new SearchRequest();
        request.indices("student");
        //创建查询请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //构建查询方式：高亮查询
        TermsQueryBuilder termsQueryBuilder = QueryBuilders.termsQuery("name", "zhangsan");
        //设置查询方式
        sourceBuilder.query(termsQueryBuilder);
        //构建高亮字段
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        //设置前置标签
        highlightBuilder.preTags("");
        //设置后置标签
        highlightBuilder.postTags("");
        //高亮字段
        highlightBuilder.field("name");
        //设置高亮构建对象
        sourceBuilder.highlighter(highlightBuilder);
        //设置请求体
        request.source(sourceBuilder);
        //3.客户端发送请求，获取响应对象
        SearchResponse response = null;
        try {
            response = client.search(request, RequestOptions.DEFAULT);

        //4.打印响应结果
        SearchHits hits = response.getHits();
        System.out.println("took::"+response.getTook());
        System.out.println("time_out::"+response.isTimedOut());
        System.out.println("total::"+hits.getTotalHits());
        System.out.println("max_score::"+hits.getMaxScore());
        System.out.println("hits::::>>");
        for (SearchHit hit : hits) {
            String sourceAsString = hit.getSourceAsString();
            System.out.println(sourceAsString);
            //打印高亮结果
            Map<String, HighlightField> highlightFields = hit.getHighlightFields();
            System.out.println(highlightFields);
        }
        System.out.println("<<::::");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

结果:

3、聚合查询

1、最大年龄

/**
 * @author zhubayi
 */
public class MaxAge {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //聚合查询
        sourceBuilder.aggregation(AggregationBuilders.max("maxAge").field("age"));

        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            System.out.println(response.toString());
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

2、分组统计

/**
 * @author zhubayi
 * 分组统计
 */
public class GroupQuery {
    public static void main(String[] args) {
        // 创建客户端对象
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost", 9200, "http"))
        );
        // 创建搜索请求对象
        SearchRequest request = new SearchRequest();
        request.indices("student");
        // 构建查询体的请求体
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //分组查询
        sourceBuilder.aggregation(AggregationBuilders.terms("age_groupby").field("age"));

        //把查询体添加到请求里
        request.source(sourceBuilder);
        try {
            //发送请求，获取响应对象
            SearchResponse response = client.search(request, RequestOptions.DEFAULT);
            System.out.println(response.toString());
            System.out.println("<<========");

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

结果：