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置顶 增强NutzDao,无需写dao实现类也能完成数据库基础crud、复杂sql查询、存储过程调用
发布于 453天前 作者 threefish 3456 次浏览 复制
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nutz-dao-enhance

增强NutzDao,无需写dao实现类也能完成数据库基础crud、复杂sql查询、存储过程调用。

  1. @Entity表示是一个实体,添加到Dao接口类上会默认会自动建表(可通过配置文件调整参考DaoProperties), @Entity(UserDO.class)
    放在方法上,该方法返回实体优先采用当前指定的class,放在类上则会自动建表,且全部方法返回实体默认采用当前指定的class
  2. 在开启自动建表的情况下,将@IgnoreAutoDDL添加到Dao接口类上将忽略当前类指定实体自动创建表更新功能
  3. 实现 AuditingEntity 接口,可以在更新和插入数据时自动设置当前操作人(对应注解 @CreatedBy @LastModifiedBy)
  4. 实现 IdentifierGenerator 接口,可以在插入时对添加了 @AutoID 字段进行赋值。如果搭配 @Id 注解,需要在 @Id(auto=false)时才生效
  5. @CustomProvider 可以方便你扩展更多基础的功能 参考 org.nutz.dao.enhance.dao.BaseDao
  6. #[] 语法使用介绍 例子: #[ and u.realName=@name and u.gmtCreate=@gmtCreate ] name或gmtCreate 入参不存在,则当前#[]中的全部条件都不生效,且会忽略这段sql
  7. 查询语句中可以使用和java实体类名称如: UserDO as u ,会翻译为 user as u 而 u.realName 则会翻译为 u.real_name

PS:1-4项的原理实际是采用NutzDao原生@PrevInsert @PrevUpdate搭配el表达式等方式来实现,原生功能更强大,请自由选择使用。

更多用法请查看 org.nutz.dao.enhance.test.dao.UserDao

maven 坐标

  1. spring boot 版本
  2. nutz boot 版本

数据库操作对象 dao

/**
 * 自动建表,通过泛型 找到 UserDO 再根据 UserDO 信息进行建表。如果不需要自动建表,需要再UserDO上添加 @IgnoreAutoDDL 主键
 * 如果没有定义泛型但是也需要自动建表功能 则需要添加 @Entity(UserDO.class) 注解
 */
@Dao
public interface UserDao extends BaseDao<UserDO> {

    /**
     * gmtCreate 入参不存在,所以当前#[]中的全部条件不生效
     * 输出SQL:select u.id,u.real_name,u.age,u.gmt_create,u.create_by from user as u where 1=1   and u.real_name='测试11'
     *
     * @param name
     * @return
     */
    @Query("select u.* from UserDO as u where 1=1"
            + "#[ and u.realName=@name and u.gmtCreate=@gmtCreate ] "
            + "#[ and u.realName=@name ] ")
    UserDO queryByCndHql(String name);

    /**
     * 查询2
     * 输出SQL: select u.id,u.real_name,u.age,u.gmt_create,u.create_by from user as u where 1=1  and u.real_name='测试11'
     *
     * @param user
     */
    @Query("select u.* from UserDO as u where 1=1 "
            + "#[ and u.realName=@{user.realName} ] ")
    UserDO queryByVoHql(UserDO user);

    /**
     * 返回当前实体类
     *
     * @param id
     * @return
     */
    @Query("select * from user where id=@id")
    UserDO queryUserById(int id);

    /**
     * 返回当前实体类
     *
     * @param id
     * @return
     */
    @Query("select * from user where id=@id")
    Optional<UserDO> queryOptionalUserById(@Param("id") int id);

    /**
     * 根据 condition 条件返回
     *
     * @param condition
     * @return
     */
    @Query("select * from user $condition")
    @Entity(UserDO.class)
    List<UserDO> listUser(Condition condition);

    /**
     * 根据 condition 条件返回
     *
     * @param condition
     * @return
     */
    @Query("select * from user $condition")
    @Entity(UserDO.class)
    Optional<List<UserDO>> listOptionalUser(Condition condition);

    /**
     * 查询返回一个map
     *
     * @param id
     * @return
     */
    @Query("select * from user where id=@id")
    Map queryMapById(int id);

    /**
     * 查询返回一个map
     *
     * @return
     */
    @Query("select * from user")
    List<Map> listMap();

    /**
     * 查询返回一个 Record
     *
     * @param id
     * @return
     */
    @Query("select * from user where id=@id")
    Record queryRecordById(int id);

    /**
     * 只会返回第一条记录,且不会像mybaits那样会提示too many result
     *
     * @return
     */
    @Query("select * from user")
    UserDO queryAllAndGetFirst();

    /**
     * 分页查询
     *
     * @param pager
     * @return
     */
    @Query("select * from user")
    PageRecord listUserPage(Pager pager);

    /**
     * 插入获取自增ID
     *
     * @param name
     * @param age
     * @param create
     * @return
     */
    @Insert("INSERT INTO user(`real_name`, `age`,`gmt_create`,`create_by`) VALUES (@name,@age, now(),@create)")
    int insert(String name, int age, String create);

    /**
     * 插入
     *
     * @param name
     * @param age
     * @param create
     */
    @Insert("INSERT INTO user(`real_name`, `age`,`gmt_create`,`create_by`) VALUES (@name,@age, now(),@create)")
    void insertVoid(String name, int age, String create);

    /**
     * 更新数据
     *
     * @param age
     * @param id
     * @return
     */
    @Update("UPDATE user SET age = @age WHERE id = @id")
    int updateAgeById(int age, int id);

    /**
     * 删除数据
     *
     * @param id
     * @return
     */
    @Delete("DELETE FROM user WHERE id=@id")
    int delectById(int id);


    /**
     * @return
     */
    @Query("select u.realName from UserDO as u")
    String[] queryRealNames();

    /**
     * @return
     */
    @Query("select u.realName from UserDO as u")
    Optional<String[]> queryOptionalRealNames();

    /**
     * @return
     */
    @Query("select u.id from UserDO as u")
    int[] queryIntIds();

    /**
     * @return
     */
    @Query("select u.id from UserDO as u")
    Integer[] queryIntegerIds();


    /**
     * 自定义提供类处理
     * <p>
     * 通过自定义扩展,实现插入并返回自增ID
     *
     * @param name
     * @param age
     * @param create
     * @return
     */
    @Insert("INSERT INTO user(`real_name`, `age`,`gmt_create`,`create_by`) VALUES (@name,@age, now(),@create)")
    @CustomProvider(type = TestProvider.class, methodName = "insertWithCustomprovider")
    int insertWithCustomprovider(String name, int age, String create);

    /**
     * 返回值是列表
     * CREATE  PROCEDURE `callList`()
     * BEGIN
     * SELECT * FROM user;
     * END
     *
     * @return
     */
    @CallFunction("call callList()")
    Optional<List<UserVO>> callList();

    /**
     * 通过出参返回单行数据
     * CREATE PROCEDURE `callOut`(IN id INT,OUT realName VARCHAR(15),OUT age INT(15))
     * BEGIN
     * SELECT real_name,user.`age` INTO realName,age FROM `user`  WHERE `user`.id=id;
     * END
     */
    @CallFunction(value = "call callOut(@id,?,?)", out = {
            @CallFunction.Out(name = "realName", index = 2),
            @CallFunction.Out(name = "age", index = 3)
    })
    Optional<UserVO> callOut(@Param("id") int id);

}



测试类

@RunWith(SpringRunner.class)
@SpringBootTest(classes = MainApplication.class)
@TestMethodOrder(MethodOrderer.OrderAnnotation.class)
@Transactional
public class SpringDaoTest {
    /**
     * 防止IDE报红可以在 UserDao 类上加 Spring 注册注解如  @Repository @Component 等
     */
    @Autowired
    private UserDao userDao;

    private UserDO u1 = null;
    private UserDO u2 = null;
    private UserDO u3 = null;

    @Before
    public void before() {
        userDao.clear();
        u1 = userDao.insert(UserDO.builder().age(15).realName("测试1").build());
        u2 = userDao.insert(UserDO.builder().age(16).realName("测试2").build());
        u3 = userDao.insert(UserDO.builder().age(17).realName("测试3").build());
    }

    @After
    public void after() {
        userDao.clear();
    }

    @Test
    public void test_condition() {
        List<UserDO> list = userDao.listUser(Cnd.where(UserDO::getAge, "=", 15));
        assert list.size() == 1;
    }


    @Test
    public void list_optional_user_condition() {
        Optional<List<UserDO>> optional = userDao.listOptionalUser(Cnd.where(UserDO::getAge, "=", 15));
        assert optional.isPresent() && optional.get().size() == 1;
    }


    @Test
    public void test_list_map() {
        List<Map> maps = userDao.listMap();
        assert maps.size() == 3;

    }

    @Test
    public void test_list_pagedata() {
        PageRecord<UserDO> pageRecord = userDao.listUserPage(new Pager(1, 10));
        assert pageRecord.getTotal() == 3;
        assert pageRecord.getRecords().size() == 3;
    }

    @Test
    public void test_query_user_by_id() {
        UserDO uset = userDao.queryUserById(u1.getId());
        assert uset != null;
    }

    @Test
    public void test_query_optional_user_by_id() {
        final Optional<UserDO> userDO = userDao.queryOptionalUserById(u1.getId());
        assert userDO != null && userDO.isPresent();
    }

    @Test
    public void test_query_map_by_id() {
        Map map = userDao.queryMapById(u1.getId());
        assert map != null;

    }

    @Test
    public void test_query_record_by_id() {
        Record record = userDao.queryRecordById(u1.getId());
        assert record != null;
    }

    @Test
    public void test_query_all_and_get_first() {
        UserDO usetDO = userDao.queryAllAndGetFirst();
        assert usetDO != null;
    }

    @Test
    public void test_insert_void() {
        userDao.insertVoid("王五", 100, "张三");
    }

    @Test
    public void test_insert_and_incr_pk_id() {
        int insertId = userDao.insert("王五", 100, "张三");
        assert insertId > 0;

    }


    @Test
    public void test_update_age_by_id() {
        int insertId = userDao.insert("王五", 100, "张三");
        int updateCount = userDao.updateAgeById(50, insertId);
        assert updateCount == 1;
    }

    @Test
    public void test_delect_by_id() {
        int insertId = userDao.insert("王五", 100, "张三");
        int delectCount = userDao.delectById(insertId);
        assert delectCount == 1;
    }


    @Test
    public void test_insert_entity() {
        UserDO insert = userDao.insert(UserDO.builder().age(15).realName("测试11").build());
        assert insert.getId() > 0;
    }

    @Test
    public void test_fetch_by_id() {
        UserDO insert = userDao.insert(UserDO.builder().age(15).realName("测试11").build());
        UserDO fetch = userDao.fetch(insert.getId());
        assert fetch.getId() > 0;
    }

    @Test
    public void test_delete_by_id() {
        UserDO insert = userDao.insert(UserDO.builder().age(15).realName("测试11").build());
        int updateCount = userDao.delete(insert.getId());
        assert updateCount == 1;
    }


    @Test
    public void test_cnd_hql() {
        final UserDO userDO = UserDO.builder().age(15).realName("测试11").build();
        userDao.insert(userDO);
        UserDO fetch = userDao.queryByCndHql("测试11");
        assert fetch != null;
    }

    @Test
    public void test_cnd_hql_vo() {
        final UserDO userDO = UserDO.builder().age(15).realName(u1.getRealName()).build();
        UserDO fetch2 = userDao.queryByVoHql(userDO);
        assert fetch2 != null;
    }


    @Test
    public void test_query_realnames() {
        String[] strings = userDao.queryRealNames();
        assert Arrays.equals(strings, new String[]{u1.getRealName(), u2.getRealName(), u3.getRealName()});
    }

    @Test
    public void test_query_optional_realnames() {
        final Optional<String[]> strings = userDao.queryOptionalRealNames();
        assert strings.isPresent() && Arrays.equals(strings.get(), new String[]{u1.getRealName(), u2.getRealName(), u3.getRealName()});
    }

    @Test
    public void test_query_int_ids() {
        int[] ints = userDao.queryIntIds();
        assert Arrays.equals(ints, new int[]{u1.getId(), u2.getId(), u3.getId()});
    }

    @Test
    public void test_query_integer_ids() {
        Integer[] ints = userDao.queryIntegerIds();
        assert Arrays.equals(ints, new Integer[]{u1.getId(), u2.getId(), u3.getId()});
    }

    @Test
    public void test_insert_with_customprovider() {
        int maxId = userDao.getMaxId();
        int insertId = userDao.insertWithCustomprovider("王五", 100, null);
        assert insertId == maxId + 1;
    }

    @Test
    public void test_call_list() {
        Optional<List<UserVO>> maps = userDao.callList();
        assert maps.get().size() == 3;
    }

    @Test
    public void test_call_out() {
        int maxId = userDao.getMaxId();
        Optional<UserVO> data = userDao.callOut(maxId);
        assert u3.getRealName().equals(data.get().getRealName());
    }

}



实体类 entity

@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@Table("user")
public class UserDO {
    @Id
    Integer id;
    @Column
    String name;
    @Column
    Integer age;
}

2 回复

1、自定义SQL下可按参数循环执行sql语句(batch操作)
2、@FieldCalculation 字段计算注解可以方便的在查询结果下对查询对象进行计算(通过表达式赋值)
3、lambda增删改查连表查询join

//lambda方式更新
userDao.lambdaUpdate().set(UserDO::getAge, 123).eq(UserDO::getAge, 15).update();
userDao.lambdaUpdate().eq(UserDO::getAge, 15).delete();
userDao.lambdaUpdate().set(UserDO::getAge, 250).insert();

//lambda方式查询
userDao.lambdaQuery().isNotNull(UserDO::getRealName).in(UserDO::getAge,Arrays.asList(15,16)).list();
userDao.lambdaQuery().isNull(UserDO::getRealName).one();
userDao.lambdaQuery().gte(UserDO::getAge, 17).count();
userDao.lambdaQuery().gte(UserDO::getAge, 17)
        .and(c -> c.gte(UserDO::getAge, 15).lte(UserDO::getAge, 40), c -> c.gte(UserDO::getId, 10))
        .list();
List<UserDO> list = userDao.lambdaQuery()
                .selectAs(UserDO::getRealName, JobDO::getRealName)
                .leftJoin(JobDO.class, UserDO::getId, JobDO::getUserId)
                .like(UserDO.class, JobDO::getRealName, "测试")
                .groupBy(UserDO::getRealName)
                .list();
        assert list.size() == 3;

        PageRecord<UserDO> page = userDao.lambdaQuery()
                .selectAs(UserDO::getRealName, JobDO::getUserId)
                .leftJoin(JobDO.class, UserDO::getId, JobDO::getUserId)
                .like(UserDO.class, JobDO::getRealName, "测试")
                .limit(1, 10)
                .listPage();
        assert page.getTotal() == 3;
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