CN109299332A - A kind of method, apparatus and storage medium by class and Database Mapping - Google Patents
A kind of method, apparatus and storage medium by class and Database Mapping Download PDFInfo
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Abstract
The present invention provides a kind of method, apparatus and storage medium by class and Database Mapping, need to be mapped to the class entity of database table including newly-built or importing, Custom Attributes is carried out to the class entity according to demand, corresponding class object is mapped to the column of database table by the field of reflection technology acquisition class object and the Custom Attributes value of the field and according to the field of class entity and the customized attribute value of the field.The device includes class entity set-up module, self-defining attribute module, mapping relations respective modules, database table module and data processing module；The method that the present invention uses Custom Attributes may be implemented the field of class object customized with database mapping relations, after which, lightweight, developer can with fast operating database, and operating database do not allow it is error-prone.
Description
Technical field
The invention belongs to Database Mapping conversion art more particularly to a kind of method, apparatus by class and Database Mapping
And storage medium.
Background technique
Database Mapping abbreviation ORM, be by using the metadata mapped between description object and database, will be towards right
It is substantially exactly to be transformed into data separately from a kind of form as the object in LISP program LISP is persisted in relational database automatically
A kind of outer form.
Originally the method for operating database is directly to build table, read-write table data, which using ado.net character string forms
Exploration project is very slow for developer, and error-prone, or uses ORM tool such as EF, but these ORM works
Comparatively tool, belongs to heavyweight frame, and be not suitable for customized exploitation.
Summary of the invention
The present invention provides a kind of method, apparatus and storage medium by class and Database Mapping, it is intended to solve the prior art
In, the method for originally operating database is directly to build table, read-write table data using ado.net character string forms, which for
Exploration project is very slow for developer, and error-prone, or uses ORM tool such as EF, but these ORM tool phases
For, the problem of belonging to heavyweight frame, and be not suitable for customized exploitation.
The invention is realized in this way a method of by class and Database Mapping, include the following steps: step S1: new
Build or import the class entity for needing to be mapped to database table；Step S2: customized category is carried out to the class entity according to demand
Property；Step S3: the field of class object and the Custom Attributes value of the field are obtained by reflection technology；Step S4: according to class reality
Corresponding class object is mapped to the column of database table by the customized attribute value of the field of body and the field.
Wherein, class entity file is corresponded to model according to mapping relations and is mapped to data form by the database table, according to
Class object is mapped to the column of data form by class entities field.
Wherein, class entity sets are input in database table, class entity sets is criticized by the database table
Amount processing.
Wherein, the data preparation can be deleted and be replaced to file by the data processing, and by alternate file
It is separately cached with original document.
Wherein, the field name of the entitled class entity of column of the table in database, constraint the making by oneself according to class entities field of column
Adopted attribute value is set, and each row of data of table is single class entity object.
A kind of device by class and Database Mapping characterized by comprising class entity set-up module, the entity wound
Modeling block is for creating or importing class entity file；Self-defining attribute module, the self-defining attribute module are used for class entity
File carries out self-defining attribute according to different demands；Mapping relations respective modules, the mapping relations respective modules are for obtaining
The Custom Attributes value of the field of class object and the field；Database table module, the database table module is for passing through mapping
Relationship corresponds to the shape form that class object is mapped to table by model；Data processing module, the data processing module are used for institute
It states database table and the work such as modifies, stores, adds and delete.
Wherein, data processing module maps class entity object set and single class entity object set by reflection technology
For the field value in tables of data, and it is input to database.
Wherein, the data processing further includes data distribution, data analysis, data buffer storage and storage list.
Wherein, the mapping relations are corresponded to model and are reacted using UML static mechanism figure, are inscribed domain by the center UML and are gradually turned
Change, and is modeled by class.
Wherein, a kind of computer readable storage medium, the program are realized described in any of the above embodiments when being executed by processor
By the method for class and Database Mapping, or including device described in any of the above embodiments.
Compared with prior art, the beneficial effects of the present invention are: the method that the present invention uses Custom Attributes, makes class object
Field may be implemented customized with database mapping relations, after which, lightweight, developer can be quick
Operating database, and operating database do not allow it is error-prone.
Detailed description of the invention
Fig. 1 is overall schematic of the invention；
Fig. 2 is mapping relations UML static mechanism schematic diagram of the present invention；
Fig. 3 is data processing schematic diagram of the invention；
Fig. 4 is Form Handle schematic diagram of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.In addition, in the description of the present invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
Fig. 1-4 is please referred to, the present invention provides a kind of method by class and Database Mapping: further including following steps: step
S1: newly-built or importing needs to be mapped to the class entity of database table；Step S2: the class entity is made by oneself according to demand
Adopted attribute；Step S3: the field of class object and the Custom Attributes value of the field are obtained by reflection technology；Step S4: according to
Corresponding class object is mapped to the column of database table by the field of class entity and the customized attribute value of the field.
In the present embodiment, firstly, it is newly-built or import the class entity file for needing to be mapped to database table, then root
Custom Attributes is carried out to the class entity according to demand, i.e., corresponds to model by mapping relations, corresponding class entity is advised
It draws and models, the information of system actual use and the attribute of data entity are designed and Implemented, according to required requirement, by managing
The customized constrained attributes of member obtain the customized constrained attributes of the requirement of class entity as required followed by reflection technology
The field of class object and the Custom Attributes value of the field are taken, i.e., according to class entities field and the Custom Attributes value of the field
Corresponding class object is mapped to the column of tables of data, it will be corresponding according to the customized attribute value of the field of class entity and the field
Class object be mapped to the column of database table, i.e., correspond to the constraint relationship in model by mapping relations and class entity carry out pair
Than, so that class entity file is converted to database table, and stored, thus complete class entity being mapped to database table,
If desired to the file in database table modify, add or replace etc. operation when, by data processing to data carry out it is whole
Reason first exports the file in database table when such as storing data, and storing data passes through data processing for class entity object set
Single class entity object set, the field value of tables of data is then mapped to by reflection technology, database is then written by traversal,
Similarly, inquiry data are then the data conversion of table is realized the table data load in database at class entity object set
Rapid batch inquiry, modification data are the Custom Attributes train values (Update) according to class entity object, to decide whether to modify
The field, according to the customized attribute value of the field of class entity and the field by the tables of data that is mapped to of corresponding class object
Column, data processing by administrator confirm errorless later can store to database table after completing.
In the present embodiment, description file is imported into class entity set-up module, and passes through class entity set-up module creation
It needs to be mapped to the class entity of database table, the field of class object and making by oneself for the field is then obtained by the reflection technology of C#
Corresponding class entity is planned and is modeled by adopted attribute value, and according to required requirement, such as " major key " is constrained, " unique value "
Constraint, " non-empty " constrain, and " from increasing " constraint, " default value " constraint etc. is customized by administrator, according to the field of class entity and is somebody's turn to do
For the customized attribute value of field by the column for being mapped to tables of data of corresponding class object, the entitled class of the column of the table in database is real
The constraint of the field name of body, column is set according to the Custom Attributes value of class entities field, and each row of data of table is that single class is real
Body object, multirow are exactly multiple class entity objects, will describe file and are carried out by the constraint relationship in mapping relations respective modules
A group objects with similar structure, behavior and relationship is passed through the mapping relations that administrator is established, and carried out gradually by comparison
Conversion when the file inside database table needs to modify, modifies data so that description file is converted to database table
It is the Custom Attributes train value (Update) according to class entity object, to decide whether to modify the field value, the default of Update
Attribute is that modification can be modified if necessary to modify to data by Data Integration, and click starts, and input data,
It is distributed by data and is allocated received Various types of data source information, then pass through oneself of the class entity object of Data processing
The constraint condition of defined attribute train value carries out program judgement to data, when judging result is "Yes", automatically by class entity object
Be transferred in data buffer storage and temporarily stored, and by administrator further confirm that it is errorless after class entity object is transferred to number
According to library table, file is permanently stored in table form, when the judging result of the Custom Attributes train value of class entity object
When for "No", class entity object auto-returned data processing, the data that mistake will be present manually by administrator are deleted, are increased
Add or modify, program judgement is continued through after the completion of modification and stores up database table after result judging result is "Yes"
It saves as only, can fast and accurately be operated using this method, avoid slow using EF Development of Framework project, and can not be made by oneself
The problem of justice setting.
Further, class entity file is corresponded to model according to mapping relations and is mapped to data form by the database table,
Class object is mapped to the column of data form according to class entities field.
In the present embodiment, class entity file is corresponded into model according to mapping relations and is mapped to data form, thus shape
Class object convenient for the lookup and operation of user class entities field is mapped to to the column of data form at database table, thus real
Conversion between existing class entity file and database table.
Further, class entity sets are input in database table, by the database table to class entity sets into
Row batch processing.
In the present embodiment, carrying out batch processing to the file in database table is by data processing by class entity pair
As COLLECTION TRAVERSALSThe, single class entity object set is then mapped it into the field value of tables of data by reflection technology, thus
Realize batch operation.
Further, the data preparation can be deleted and be replaced to file by the data processing, and will replacement
File and original document separately cache.
In the present embodiment, data are deleted and are replaced by data preparation, convenient for administrator to data more
Give, alternate file and original document separately cached, original document can be retained, when alternate file when the error occurs, hole passes through
It is compared with original document, finds out mistake convenient for administrator.
Further, the field name of the entitled class entity of column of the table in database, the constraint of column is according to class entities field
Custom Attributes value is set, and each row of data of table is single class entity object.
In the present embodiment, the field name of the entitled class entity of column of the table in database, the constraint of column is according to class entity
The Custom Attributes value of field is set, and realizes administrator to the customized of database table, convenient for the operation of administrator.
The present invention provides a kind of method by class and Database Mapping, comprising: class entity set-up module, the entity set-up
Module is for creating or importing class entity file；Self-defining attribute module, the self-defining attribute module are used for class entity text
Part carries out self-defining attribute according to different demands；Mapping relations respective modules, the mapping relations respective modules are for obtaining class
The Custom Attributes value of the field of object and the field；Database table module, the database table module are used to close by mapping
It is the shape form that class object is mapped to table by corresponding model；Data processing module, the data processing module are used for described
Database table such as modifies, stores, adds and deletes at the work.
Further, class entity object set and single class entity object set are passed through reflection technology by data processing module
The field value being mapped as in tables of data, and it is input to database.
In the present embodiment, by then by single class entity object set, passing through class entity object COLLECTION TRAVERSALSThe
Reflection technology maps it onto the field value of tables of data, realizes to the batch modification of class entity object, deletion, addition and preservation
Work.
Further, the data processing further includes data distribution, data analysis, data buffer storage and storage list.
In the present embodiment, it is distributed by data and is classified to description file, by data processing to description file
It the work such as is modified, adds, deletes and inquires, temporarily stored by class entity file of the data buffer storage to mapping, to
Administrator generates storage list and stores after determining again.
Further, the mapping relations correspond to model using UML static mechanism figure react, by the center UML inscribe domain by
Step conversion, and modeled by class.
In the present embodiment, data list structure as shown in Figure 2 indicates that a table in data, table name are
Student, table have these column fields of id, name, age, height, weight and company, wherein the data class of id
Type is integer, and the data type of field name is varchar character type, and the data type of field age is integer integer, after
Face field height, field weight, field country data type be followed successively by integer integer, integer integer,
Varchar character type, class entity structure indicate a class entity structure in object oriented language, in this class entity structure
Containing field id, name, age, height, weight and country, the field of class formation entity and database table structure is one by one
Corresponding, data type is also to correspond, and here it is the table structures of database to be mapped to the reality of the class in corresponding object oriented language
Body structure, field attribute in class indicate the corresponding attribute of the field in class entity structure, which is for correspondence database table
The restrictive condition of column field in structure, such as the column field id in database, are an int integer types, and be major key
Constraint, not null constraint, default value 0, this Primary key, not null constraint, default value are in 0 corresponding exactly class entity structure
Attribute in field, such as the Field ID in class entity structure, the attribute possessed is [constant (primary key=
True, default=0, notnull=true)], then it represents that field id and id in database table structure is carried out in such entity
When mapping, database table field id column are constrained to major key, default value 0.
Further, a kind of computer readable storage medium realizes any of the above-described institute when the program is executed by processor
The method by class and Database Mapping stated, or including device described in any of the above embodiments.
Class entity is mapped to database table in the present embodiment, keeps administrator's operation more convenient, and convenient for management
Member carries out customized setting, improves the speed of administrator's exploration project.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of method by class and Database Mapping, characterized by the following steps:
Step S1: newly-built or importing needs to be mapped to the class entity of database table；
Step S2: Custom Attributes is carried out to the class entity according to demand；
Step S3: the field of class object and the Custom Attributes value of the field are obtained by reflection technology；
Step S4: corresponding class object is mapped to by database according to the customized attribute value of the field of class entity and the field
The column of table.
2. a kind of method by class and Database Mapping as described in claim 1, it is characterised in that: the database table is by class
Entity file corresponds to model according to mapping relations and is mapped to data form, and class object is mapped to tables of data according to class entities field
The column of lattice.
3. a kind of method by class and Database Mapping as described in claim 1, it is characterised in that: input class entity sets
Into database table, batch processing is carried out to class entity sets by the database table.
4. a kind of method by class and Database Mapping as claimed in claim 3, it is characterised in that: the data preparation can lead to
It crosses the data processing file is deleted and replaced, and alternate file and original document is separately cached.
5. a kind of method by class and Database Mapping as described in claim 1, it is characterised in that: the column of the table in database
The constraint of the field name of entitled class entity, column is set according to the Custom Attributes value of class entities field, and each row of data of table is
Single class entity object.
6. a kind of device by class and Database Mapping characterized by comprising
Class entity set-up module, the entity set-up module is for creating or importing class entity file；
Self-defining attribute module, the self-defining attribute module are used to carry out attribute according to different demands to class entity file to make by oneself
Justice；
Mapping relations respective modules, the mapping relations respective modules be used for obtain class object field and the field it is customized
Attribute value；
Class object is mapped to table for corresponding to model by mapping relations by database table module, the database table module
Shape form；
Data processing module, the data processing module is for modifying, storing, adding and deleting to the database table
Work.
7. a kind of device by class and Database Mapping as claimed in claim 6, it is characterised in that: data processing module is by class
Entity object set and single class entity object set are mapped as the field value in tables of data by reflection technology, and are input to number
According to library.
8. a kind of device by class and Database Mapping as claimed in claim 6, it is characterised in that: the data processing is also wrapped
Include data distribution, data analysis, data buffer storage and storage list.
9. a kind of device by class and Database Mapping as claimed in claim 6, it is characterised in that: the mapping relations are corresponding
Model is reacted using UML static mechanism figure, is inscribed domain by the center UML and is gradually converted, and is modeled by class.
10. a kind of computer readable storage medium, which is characterized in that realize such as claim 1 when the program is executed by processor
To the described in any item methods by class and Database Mapping of claim 5, or including any one of right 6 to claim 9
The device.
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Cited By (14)
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| CN110555015A (en) * | 2019-09-09 | 2019-12-10 | 腾讯科技（深圳）有限公司 | Database entity management method and device, electronic equipment and storage medium |
| CN111159275A (en) * | 2020-01-02 | 2020-05-15 | 广州虎牙科技有限公司 | Data import method and device, electronic equipment and storage medium |
| CN111752928A (en) * | 2020-06-30 | 2020-10-09 | 武汉虹信技术服务有限责任公司 | Database object migration method and system |
| CN111752546A (en) * | 2020-06-30 | 2020-10-09 | 武汉虹信技术服务有限责任公司 | Excel-based database object design management platform, system and method |
| CN111881220A (en) * | 2020-06-22 | 2020-11-03 | 北京城市网邻信息技术有限公司 | Data operation method and device under list storage, electronic equipment and storage medium |
| CN111966704A (en) * | 2020-07-09 | 2020-11-20 | 杭州传化智能制造科技有限公司 | ORM framework implementation method, system, computer equipment and storage medium |
| CN112416957A (en) * | 2020-11-20 | 2021-02-26 | 上海幻电信息科技有限公司 | Data increment updating method and device based on data model layer and computer equipment |
| CN112685288A (en) * | 2020-12-03 | 2021-04-20 | 福建亿能达信息技术股份有限公司 | Method, device, equipment and medium for generating test data of association table |
| CN112749173A (en) * | 2019-10-29 | 2021-05-04 | 北京国双科技有限公司 | Method and device for updating object |
| CN112860793A (en) * | 2021-02-03 | 2021-05-28 | 浪潮云信息技术股份公司 | Method for realizing metadata synchronization between different source databases |
| CN112988857A (en) * | 2019-12-12 | 2021-06-18 | 北京沃东天骏信息技术有限公司 | Service data processing method and device |
| CN113032393A (en) * | 2021-01-26 | 2021-06-25 | 苏州帝博信息技术有限公司 | Method and device for binding associated object |
| CN115495398A (en) * | 2022-09-28 | 2022-12-20 | 北京亚控科技发展有限公司 | Interface resource operation method and device, electronic equipment, storage medium and product |
| CN111427867B (en) * | 2020-03-30 | 2023-10-20 | 杭州华望系统科技有限公司 | Model persistence method based on hybrid storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110555015A (en) * | 2019-09-09 | 2019-12-10 | 腾讯科技（深圳）有限公司 | Database entity management method and device, electronic equipment and storage medium |
| CN112749173A (en) * | 2019-10-29 | 2021-05-04 | 北京国双科技有限公司 | Method and device for updating object |
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| CN111752928A (en) * | 2020-06-30 | 2020-10-09 | 武汉虹信技术服务有限责任公司 | Database object migration method and system |
| CN111966704A (en) * | 2020-07-09 | 2020-11-20 | 杭州传化智能制造科技有限公司 | ORM framework implementation method, system, computer equipment and storage medium |
| CN112416957A (en) * | 2020-11-20 | 2021-02-26 | 上海幻电信息科技有限公司 | Data increment updating method and device based on data model layer and computer equipment |
| CN112416957B (en) * | 2020-11-20 | 2023-12-29 | 上海幻电信息科技有限公司 | Data increment updating method and device based on data model layer and computer equipment |
| CN112685288A (en) * | 2020-12-03 | 2021-04-20 | 福建亿能达信息技术股份有限公司 | Method, device, equipment and medium for generating test data of association table |
| CN113032393A (en) * | 2021-01-26 | 2021-06-25 | 苏州帝博信息技术有限公司 | Method and device for binding associated object |
| CN113032393B (en) * | 2021-01-26 | 2024-01-02 | 苏州帝博信息技术有限公司 | Method and device for binding associated objects |
| CN112860793A (en) * | 2021-02-03 | 2021-05-28 | 浪潮云信息技术股份公司 | Method for realizing metadata synchronization between different source databases |
| CN115495398A (en) * | 2022-09-28 | 2022-12-20 | 北京亚控科技发展有限公司 | Interface resource operation method and device, electronic equipment, storage medium and product |
| CN115495398B (en) * | 2022-09-28 | 2023-06-30 | 北京亚控科技发展有限公司 | Interface resource operation method, device, electronic equipment and storage medium |
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