150 lines
5.8 KiB
Markdown
150 lines
5.8 KiB
Markdown
## diboot-core: 全新优化内核
|
||
主要实现:
|
||
1. 单表CRUD和多表关联查询的无SQL化
|
||
2. Entity/DTO自动转换为QueryWrapper(@BindQuery注解绑定字段参数的查询条件,可自动构建关联查询)
|
||
3. 提供其他常用开发场景的最佳实践封装。
|
||
|
||
### ** 一. 单表CRUD无SQL
|
||
> 依赖Mybatis-plus实现(Mybatis-plus具备通用Mapper方案和灵活的查询构造器)
|
||
### ** 二. 多表关联查询无SQL
|
||
> 通过@Bind*注解绑定关联,自动拆分成单表查询并绑定结果
|
||
[(了解拆解关联查询的价值)](https://www.kancloud.cn/ddupl/sql_optimize/1141077)
|
||
#### 1. 注解自动绑定数据字典(自定义枚举)的显示值Label
|
||
~~~java
|
||
@BindDict(type="USER_STATUS", field = "status")
|
||
private String statusLabel;
|
||
~~~
|
||
#### 2. 注解自动绑定其他表的字段
|
||
~~~java
|
||
// 支持关联条件+附加条件绑定字段
|
||
@BindField(entity=Department.class, field="name", condition="department_id=id AND parent_id>=0")
|
||
private String deptName;
|
||
|
||
// 支持通过中间表的级联关联绑定字段
|
||
@BindField(entity = Organization.class, field="name", condition="this.department_id=department.id AND department.org_id=id")
|
||
private String orgName;
|
||
~~~
|
||
#### 3. 注解自动绑定其他表实体Entity/VO
|
||
~~~java
|
||
// 支持关联条件+附加条件绑定Entity
|
||
@BindEntity(entity = Department.class, condition="department_id=id")
|
||
private Department department;
|
||
|
||
// 通过中间表的级联关联绑定Entity(支持附加条件)
|
||
@BindEntity(entity = Organization.class, condition = "this.department_id=department.id AND department.org_id=id AND department.deleted=0")
|
||
private Organization organization;
|
||
~~~
|
||
#### 4. 注解自动绑定其他表实体集合List<Entity>
|
||
~~~java
|
||
// 支持关联条件+附加条件绑定多个Entity
|
||
@BindEntityList(entity = Department.class, condition = "id=parent_id")
|
||
private List<Department> children;
|
||
|
||
// 通过中间表的 多对多关联 绑定Entity(支持附加条件)
|
||
@BindEntityList(entity = Role.class, condition="this.id=user_role.user_id AND user_role.role_id=id")
|
||
private List<Role> roleList;
|
||
~~~
|
||
#### 5. 注解自动绑定其他表某字段集合List<>
|
||
~~~java
|
||
// 支持关联条件+附加条件绑定多个Entity的某字段
|
||
@BindFieldList(entity = Department.class, field="id", condition = "id=parent_id")
|
||
private List<Long> childrenIds;
|
||
|
||
// 通过中间表的 多对多关联 绑定Entity某字段(支持附加条件)
|
||
@BindEntityList(entity = Role.class, field="code", condition="this.id=user_role.user_id AND user_role.role_id=id")
|
||
private List<String> roleCodes;
|
||
~~~
|
||
|
||
### ** 三. 注解绑定关联的使用方式
|
||
|
||
#### 1. 定义你的Entity对应的Service(继承diboot的BaseService)及Mapper
|
||
> * 启用diboot-devtools,自动生成后端各层代码。
|
||
#### 2. 参照以上注解说明在VO中定义你的关联
|
||
|
||
#### 3. 使用注解绑定:
|
||
调用Binder自动绑定注解相关关联:
|
||
##### 方式1. 自动绑定关联(不需要转型)
|
||
~~~java
|
||
//List<MyUserVO> voList = ...;
|
||
Binder.bindRelations(voList);
|
||
~~~
|
||
##### 方式2. 自动转型并绑定关联(需要转型)
|
||
~~~java
|
||
// 查询单表获取Entity集合
|
||
// List<User> entityList = userService.list(queryWrapper);
|
||
List<MyUserVO> voList = Binder.convertAndBindRelations(userList, MyUserVO.class);
|
||
~~~
|
||
|
||
### ** 四. Entity/DTO自动转换QueryWrapper自动构建Join查询
|
||
#### 1. Entity/DTO中声明映射查询条件
|
||
示例代码:
|
||
~~~java
|
||
public class UserDTO {
|
||
// 无@BindQuery注解默认会映射为=条件
|
||
private Long gender;
|
||
|
||
// 有注解,映射为注解指定条件
|
||
@BindQuery(comparison = Comparison.LIKE)
|
||
private String realname;
|
||
|
||
// join其他表
|
||
@BindQuery(comparison = Comparison.STARTSWITH, entity=Organization.class, field="name", condition="this.org_id=id")
|
||
private String orgName;
|
||
}
|
||
~~~
|
||
#### 2. 调用QueryBuilder.toQueryWrapper(entityOrDto)进行转换
|
||
~~~java
|
||
/**
|
||
* url参数示例: /list?gender=M&realname=张
|
||
* 将映射为 queryWrapper.eq("gender", "M").like("realname", "张")
|
||
*/
|
||
@GetMapping("/list")
|
||
public JsonResult getVOList(UserDto userDto) throws Exception{
|
||
//调用super.buildQueryWrapper(entityOrDto) 进行转换
|
||
QueryWrapper<User> queryWrapper = super.buildQueryWrapper(userDto);
|
||
// 或者直接调用 QueryBuilder.toQueryWrapper(entityOrDto) 转换
|
||
//QueryWrapper<User> queryWrapper = QueryBuilder.buildQueryWrapper(userDto);
|
||
|
||
//... 查询list
|
||
return JsonResult.OK(list);
|
||
}
|
||
~~~
|
||
|
||
#### 3. 支持动态Join的关联查询与结果绑定
|
||
> 动态查询的调用方式有以下两种:
|
||
##### 方式1. 通过QueryBuilder链式调用
|
||
~~~java
|
||
QueryBuilder.toDynamicJoinQueryWrapper(dto).queryList(Department.class);
|
||
~~~
|
||
##### 方式2. 通过QueryBuilder构建QueryWrapper,再调用Binder或JoinsBinder
|
||
~~~java
|
||
// 构建QueryWrapper
|
||
QueryWrapper<DTO> queryWrapper = QueryBuilder.toQueryWrapper(dto);
|
||
// 调用join关联查询绑定
|
||
List<Entity> list = Binder.joinQueryList(queryWrapper, Department.class);
|
||
~~~
|
||
|
||
绑定调用将自动按需(有表的查询字段时才Join)构建类似如下动态SQL并绑定结果:
|
||
> SELECT self.* FROM user self
|
||
LEFT OUTER JOIN organization r1 ON self.org_id=r1.id
|
||
WHERE (r1.name LIKE ?) AND self.is_deleted=0
|
||
|
||
### 五. 使用步骤与样例参考
|
||
#### 1. 引入依赖
|
||
Gradle:
|
||
~~~gradle
|
||
compile("com.diboot:diboot-core-spring-boot-starter:{latestVersion}")
|
||
~~~
|
||
或Maven
|
||
~~~xml
|
||
<dependency>
|
||
<groupId>com.diboot</groupId>
|
||
<artifactId>diboot-core-spring-boot-starter</artifactId>
|
||
<version>{latestVersion}</version>
|
||
</dependency>
|
||
~~~
|
||
> * @BindDict注解需要依赖dictionary表,启用diboot-devtools,初次启动时starter会自动创建该表。
|
||
|
||
#### 2. 详细文档 - [diboot-core 官方文档](https://www.diboot.com/guide/diboot-core/%E5%AE%89%E8%A3%85.html)
|
||
#### 3. 参考样例 - [diboot-core-example](https://github.com/dibo-software/diboot-v2-example/tree/master/diboot-core-example)
|