放棄老舊的Mybatis,強類型替換字符串,這是一款你不應該錯過的ORM

一款輕量級、高性能、強類型、易擴展符合C#開發者的JAVA自研ORM

github地址 easy-query https://github.com/xuejmnet/easy-query

gitee地址 easy-query https://gitee.com/xuejm/easy-query

背景

轉java後的幾年時間裏面一直在尋找一個類.net的orm,不需要很特別的功能僅希望90%的場景都可以通過強類型語法來編寫符合直覺的sql,來操作數據庫編寫業務,但是一直沒有找到僅Mybatis-Plus的單表讓我在最初的時間段內看到了希望，不過隨着使用的深入越發的發現Mybatis-Plus只是一個殘缺的orm,因爲大部分場景不支持表達式或者強類型會導致它本身的很多特性都無法使用,比如你配置了軟刪除,那麼如果你遇到了join不好意思軟刪除你需要自己處理,很多配置會隨着手寫sql的加入變的那麼的不智能,甚至表現得和sqlhelper沒區別,別說Mybatis-Plus-Join了,這玩意更逆天,如果一個orm想寫出符合自己的sql需要不斷地調試嘗試來“拼接”出想要的語句那麼他就稱不上一個ORM連sqlbuilder也算不上Mybatis-Plus-Join就是這樣.

所以在4-5年後我終於忍受不了了,決定自研一款orm,參考現有.net生態十分完整的orm代碼,和幾乎完美符合擴展性和語義性的鏈式表達式讓.net的orm帶到java中。

查詢

查詢第一條數據

Topic topic = easyQuery.queryable(Topic.class)
                    .where(o -> o.eq(Topic::getId, "123"))
                    .firstOrNull();

==> Preparing: SELECT `id`,`stars`,`title`,`create_time` FROM `t_topic` WHERE `id` = ? LIMIT 1
==> Parameters: 123(String)
<== Time Elapsed: 2(ms)
<== Total: 0

查詢並斷言至多一條數據

Topic topic = easyQuery.queryable(Topic.class)
                    .where(o -> o.eq(Topic::getId, "123"))
                    .singleOrNull();

==> Preparing: SELECT `id`,`stars`,`title`,`create_time` FROM `t_topic` WHERE `id` = ?
==> Parameters: 123(String)
<== Time Elapsed: 2(ms)
<== Total: 0

查詢多條數據

List<Topic> topics = easyQuery.queryable(Topic.class)
                    .where(o -> o.eq(Topic::getId, "123"))
                    .toList();

==> Preparing: SELECT `id`,`stars`,`title`,`create_time` FROM `t_topic` WHERE `id` = ?
==> Parameters: 123(String)
<== Time Elapsed: 2(ms)
<== Total: 0

查詢自定義列

Topic topic = easyQuery.queryable(Topic.class)
                    .where(o -> o.eq(Topic::getId, "1"))
                    .select(o->o.column(Topic::getId).column(Topic::getTitle))
                    .firstOrNull();

==> Preparing: SELECT `id`,`title` FROM `t_topic` WHERE `id` = ? LIMIT 1
==> Parameters: 1(String)
<== Time Elapsed: 2(ms)
<== Total: 1

分頁查詢

 EasyPageResult<Topic> topicPageResult = easyQuery
                .queryable(Topic.class)
                .where(o -> o.isNotNull(Topic::getId))
                .toPageResult(1, 20);

==> Preparing: SELECT  COUNT(1)  FROM t_topic t WHERE t.`id` IS NOT NULL
<== Total: 1
==> Preparing: SELECT t.`id`,t.`stars`,t.`title`,t.`create_time` FROM t_topic t WHERE t.`id` IS NOT NULL LIMIT 20
<== Total: 20

將表達式轉成匿名錶嵌套查詢

//  SELECT `id`,`title` FROM `t_topic` WHERE `id` = ? 
Queryable<Topic> query = easyQuery.queryable(Topic.class)
                    .where(o -> o.eq(Topic::getId, "1"))
                    .select(Topic.class, o -> o.column(Topic::getId).column(Topic::getTitle));

List<Topic> list = query.leftJoin(Topic.class, (t, t1) -> t.eq(t1, Topic::getId, Topic::getId))
                    .where((t, t1) -> {
                        t1.eq(Topic::getId, "123");
                        t.eq(Topic::getId, "456");
                    }).toList();

SELECT t1.`id`,t1.`title` 
FROM (SELECT t.`id`,t.`title` FROM `t_topic` t WHERE t.`id` = ?) t1 
LEFT JOIN `t_topic` t2 ON t1.`id` = t2.`id` WHERE t2.`id` = ? AND t1.`id` = ?

==> Preparing: SELECT t1.`id`,t1.`title` FROM (SELECT t.`id`,t.`title` FROM `t_topic` t WHERE t.`id` = ?) t1 LEFT JOIN `t_topic` t2 ON t1.`id` = t2.`id` WHERE t2.`id` = ? AND t1.`id` = ?
==> Parameters: 1(String),123(String),456(String)
<== Time Elapsed: 5(ms)
<== Total: 0

子查詢

//SELECT * FROM `t_blog` t1 WHERE t1.`deleted` = ? AND t1.`id` = ?
 Queryable<BlogEntity> subQueryable = easyQuery.queryable(BlogEntity.class)
                .where(o -> o.eq(BlogEntity::getId, "1"));


List<Topic> x = easyQuery
        .queryable(Topic.class).where(o -> o.exists(subQueryable.where(q -> q.eq(o, BlogEntity::getId, Topic::getId)))).toList();


==> Preparing: SELECT t.`id`,t.`stars`,t.`title`,t.`create_time` FROM `t_topic` t WHERE EXISTS (SELECT 1 FROM `t_blog` t1 WHERE t1.`deleted` = ? AND t1.`id` = ? AND t1.`id` = t.`id`)
==> Parameters: false(Boolean),1(String)
<== Time Elapsed: 3(ms)
<== Total: 1

多表join查詢

Topic topic = easyQuery
                .queryable(Topic.class)
                .leftJoin(BlogEntity.class, (t, t1) -> t.eq(t1, Topic::getId, BlogEntity::getId))
                .where(o -> o.eq(Topic::getId, "3"))
                .firstOrNull();

==> Preparing: SELECT t.`id`,t.`stars`,t.`title`,t.`create_time` FROM t_topic t LEFT JOIN t_blog t1 ON t1.`deleted` = ? AND t.`id` = t1.`id` WHERE t.`id` = ? LIMIT 1
==> Parameters: false(Boolean),3(String)
<== Total: 1

流式結果大數據迭代返回

try(JdbcStreamResult<BlogEntity> streamResult = easyQuery.queryable(BlogEntity.class).where(o -> o.le(BlogEntity::getStar, 100)).orderByAsc(o -> o.column(BlogEntity::getCreateTime)).toStreamResult()){

            LocalDateTime begin = LocalDateTime.of(2020, 1, 1, 1, 1, 1);
            int i = 0;
            for (BlogEntity blog : streamResult.getStreamIterable()) {
                String indexStr = String.valueOf(i);
                Assert.assertEquals(indexStr, blog.getId());
                Assert.assertEquals(indexStr, blog.getCreateBy());
                Assert.assertEquals(begin.plusDays(i), blog.getCreateTime());
                Assert.assertEquals(indexStr, blog.getUpdateBy());
                Assert.assertEquals(begin.plusDays(i), blog.getUpdateTime());
                Assert.assertEquals("title" + indexStr, blog.getTitle());
//            Assert.assertEquals("content" + indexStr, blog.getContent());
                Assert.assertEquals("http://blog.easy-query.com/" + indexStr, blog.getUrl());
                Assert.assertEquals(i, (int) blog.getStar());
                Assert.assertEquals(0, new BigDecimal("1.2").compareTo(blog.getScore()));
                Assert.assertEquals(i % 3 == 0 ? 0 : 1, (int) blog.getStatus());
                Assert.assertEquals(0, new BigDecimal("1.2").multiply(BigDecimal.valueOf(i)).compareTo(blog.getOrder()));
                Assert.assertEquals(i % 2 == 0, blog.getIsTop());
                Assert.assertEquals(i % 2 == 0, blog.getTop());
                Assert.assertEquals(false, blog.getDeleted());
                i++;
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }

==> Preparing: SELECT `id`,`create_time`,`update_time`,`create_by`,`update_by`,`deleted`,`title`,`content`,`url`,`star`,`publish_time`,`score`,`status`,`order`,`is_top`,`top` FROM `t_blog` WHERE `deleted` = ? AND `star` <= ? ORDER BY `create_time` ASC
==> Parameters: false(Boolean),100(Integer)
<== Time Elapsed: 6(ms)

自定義VO返回

List<QueryVO> list = easyQuery
                .queryable(Topic.class)
                //第一個join採用雙參數,參數1表示第一張表Topic 參數2表示第二張表 BlogEntity
                .leftJoin(BlogEntity.class, (t, t1) -> t.eq(t1, Topic::getId, BlogEntity::getId))
                //第二個join採用三參數,參數1表示第一張表Topic 參數2表示第二張表 BlogEntity 第三個參數表示第三張表 SysUser
                .leftJoin(SysUser.class, (t, t1, t2) -> t.eq(t2, Topic::getId, SysUser::getId))
                .where(o -> o.eq(Topic::getId, "123"))//單個條件where參數爲主表Topic
                //支持單個參數或者全參數,全參數個數爲主表+join表個數 鏈式寫法期間可以通過then來切換操作表
                .where((t, t1, t2) -> t.eq(Topic::getId, "123").then(t1).like(BlogEntity::getTitle, "456")
                        .then(t2).eq(BaseEntity::getCreateTime, LocalDateTime.now()))
                //如果不想用鏈式的then來切換也可以通過lambda 大括號方式執行順序就是代碼順序,默認採用and鏈接
                .where((t, t1, t2) -> {
                    t.eq(Topic::getId, "123");
                    t1.like(BlogEntity::getTitle, "456");
                    t1.eq(BaseEntity::getCreateTime, LocalDateTime.now());
                })
                .select(QueryVO.class, (t, t1, t2) ->
                        //將第一張表的所有屬性的列映射到vo的列名上,第一張表也可以通過columnAll將全部字段映射上去
                        // ,如果後續可以通過ignore方法來取消掉之前的映射關係
                        t.column(Topic::getId)
                                .then(t1)
                                //將第二張表的title字段映射到VO的field1字段上
                                .columnAs(BlogEntity::getTitle, QueryVO::getField1)
                                .then(t2)
                                //將第三張表的id字段映射到VO的field2字段上
                                .columnAs(SysUser::getId, QueryVO::getField2)
                ).toList();

表單條件動態查詢

BlogQuery2Request query = new BlogQuery2Request();
query.setContent("標題");
query.setPublishTimeEnd(LocalDateTime.now());
query.setStatusList(Arrays.asList(1,2));

List<BlogEntity> queryable = easyQuery.queryable(BlogEntity.class)
        .whereObject(query).toList();


==> Preparing: SELECT `id`,`create_time`,`update_time`,`create_by`,`update_by`,`deleted`,`title`,`content`,`url`,`star`,`publish_time`,`score`,`status`,`order`,`is_top`,`top` FROM `t_blog` WHERE `deleted` = ? AND `content` LIKE ? AND `publish_time` <= ? AND `status` IN (?,?)
==> Parameters: false(Boolean),%標題%(String),2023-07-14T22:37:47.880(LocalDateTime),1(Integer),2(Integer)
<== Time Elapsed: 2(ms)
<== Total: 0

基本類型結果返回

List<String> list = easyQuery.queryable(Topic.class)
                .where(o -> o.eq(Topic::getId, "1"))
                .select(String.class, o -> o.column(Topic::getId))
                .toList();

==> Preparing: SELECT t.`id` FROM `t_topic` t WHERE t.`id` = ?
==> Parameters: 1(String)
<== Time Elapsed: 2(ms)
<== Total: 1

分組查詢

List<TopicGroupTestDTO> topicGroupTestDTOS = easyQuery.queryable(Topic.class)
                .where(o -> o.eq(Topic::getId, "3"))
                .groupBy(o->o.column(Topic::getId))
                .select(TopicGroupTestDTO.class, o->o.columnAs(Topic::getId,TopicGroupTestDTO::getId).columnCount(Topic::getId,TopicGroupTestDTO::getIdCount))
                .toList();


==> Preparing: SELECT t.`id` AS `id`,COUNT(t.`id`) AS `idCount` FROM t_topic t WHERE t.`id` = ? GROUP BY t.`id`
==> Parameters: 3(String)
<== Total: 1

//groupKeysAs快速選擇並且給別名
List<TopicGroupTestDTO> topicGroupTestDTOS = easyQuery.queryable(Topic.class)
                .where(o -> o.eq(Topic::getId, "3"))
                .groupBy(o->o.column(Topic::getId))
                .select(TopicGroupTestDTO.class, o->o.groupKeysAs(0, TopicGroupTestDTO::getId).columnCount(Topic::getId,TopicGroupTestDTO::getIdCount))
                .toList();


==> Preparing: SELECT t.`id` AS `id`,COUNT(t.`id`) AS `idCount` FROM t_topic t WHERE t.`id` = ? GROUP BY t.`id`
==> Parameters: 3(String)
<== Total: 1

原生sql片段

String sql = easyQuery.queryable(H2BookTest.class)
            .where(o -> o.sqlNativeSegment("regexp_like({0},{1})", it -> it.expression(H2BookTest::getPrice)
                            .value("^Ste(v|ph)en$")))
            .select(o -> o.columnAll()).toSQL();

SELECT id,name,edition,price,store_id FROM t_book_test WHERE regexp_like(price,?)

數據庫函數列

用戶存儲的數據是base64結果,但是內存中是普通的字符串或者其他數據,easy-query提供了無感的使用，譬如pgsql的geo等地理相關數據
數據庫函數列 https://xuejm.gitee.io/easy-query-doc/guide/adv/column-sql-func-auto.html

支持like的高性能加密解密

用來實現支持like模式的高性能加密解密,支持emoji和非emoji兩種用戶可以自行選擇
數據庫加密解密 https://xuejm.gitee.io/easy-query-doc/guide/adv/column-encryption.html

更多功能比如數據追蹤差異更新,數據原子更新,分庫分表(老行當了肯定要支持),一款本無依賴雙語(java/kotlin)都支持的高性能orm