CN102955815A - Method and device for writing and reading data - Google Patents
Method and device for writing and reading data Download PDFInfo
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- CN102955815A CN102955815A CN2011102518149A CN201110251814A CN102955815A CN 102955815 A CN102955815 A CN 102955815A CN 2011102518149 A CN2011102518149 A CN 2011102518149A CN 201110251814 A CN201110251814 A CN 201110251814A CN 102955815 A CN102955815 A CN 102955815A
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Abstract
The invention provides a method and a device for writing and reading data. The method for writing data comprises the following steps: storing the information of structural relationship among data objects in an incidence relation database; and storing the information of the data objects in an object database, wherein each data object is provided with the universally unique object identity, and an indexed relation is given between the information of the data objects and the structural relation information. By adopting the technical scheme provided by the invention, the defects of XML (Extensive Makeup Language) and SQLite can be overcome. According to the method and the devices, the data objects with structures are on the basis, and the characteristic of the XML file format that the data can be flexibly stored is utilized as well as the characteristic of the SQLite database, so that the problems due to storage and sharing of a tree data structure and special data in real development can be solved, the storage capacity in data sharing can be reduced, the processing speed can be raised, and the developing cost can be reduced.
Description
Technical field
The present invention relates to a kind of method and apparatus of writing data and read data, especially relate to the read-write technology of the data object with layer of structure.
Background technology
In existing information storage technology, XML language and SQlite language are the memory technologies of commonly using.
Described XML(Extensible Markup Language) be extend markup language, it is the same with HTML, all is SGML (Standard Generalized Markup Language, standard generalized markup language).Xml is cross-platform in the Internet environment, depends on the technology of content, is the powerful when pre-treatment structured document information.Extending mark language XML is a kind of simple data storage language, use a series of simple mark data of description, and these marks can be set up with mode easily, although the space that XML takies will take more space than binary data, XML extremely simply is easy to grasp and use.
Described SQLite, it is a light-duty database, it is the correlation data base management system (DBMS) of observing ACID, its design object is Embedded, and in a lot of embedded products, used it at present, it takies very low of resource, in embedded device, may only need the internal memory of hundreds of K just much of that.It can support the operating system of Windows/Linux/Unix etc. main flow, can combine with a lot of program languages simultaneously, such as Tcl, C#, PHP, Java etc., also has the ODBC interface, compared with this two world-renowned data base management system (DBMS) of increasing income of Mysql, PostgreSQL, its processing speed is all faster than them equally.First Alpha version of SQLite is born in May, 2000,10 days so far, and SQLite has also welcome a version SQLite 3 and issued.
But, in real performance history, XML and SQLite be Shortcomings separately: use XML to store very flexibly data, but be inconvenient to be used for the data storage of a plurality of application and share, also cannot solve in the reality exploitation tree form data structure and specifically data storage with share; SQlite can't judge in the process of using in the database which data need to store, how carry out related with other data with them.
Summary of the invention
The invention provides a kind of method of writing data, comprising:
Interface unit by the incidence relation database deposits the structural relation information between the data object in the incidence relation database; The described structural relation information that deposits data object in comprises:
Set up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object;
In each data structure cell, write the sign of data structure cell of sign, attribute information, the last layer under it of this layer;
Deposit the information of data object in object database in by the interface unit of object database, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information; The described information that deposits data object in of stating comprises:
For each independently data object produce object identity;
The information of described data object is write the data object unit of described object identity appointment.
Optionally, described incidence relation database adopts the SQlite database.
Optionally, described data object unit adopts the XML file layout.
The present invention also provides a kind of method of read data, it is characterized in that, comprising:
Interface unit structural relation information between the reading out data object in the incidence relation database by the incidence relation database; The structural relation information of described reading out data object specifically comprises:
Read the sign of data structure cell of sign, attribute information, the last layer under it of this layer in each data structure cell;
Obtain structural relation between the data object according to a plurality of data structure cells with hierarchical relationship;
According to described structural relation information, the information of the interface unit reading out data object in object database by object database; The information of described reading out data object specifically comprises:
Read each independently object identity of data object;
Read the information of described data object from the data object unit of described object identity appointment.
Optionally, described incidence relation database adopts the SQlite database.
Optionally, described data object unit adopts the XML file layout.
The present invention also provides a kind of device of writing data, it is characterized in that, comprising:
Structural relation information r/w cell is for the structural relation information that deposits at the incidence relation database between the data object; Described structural relation information r/w cell comprises:
Structural relation information is write interface unit, is used for depositing in by the interface unit of incidence relation database the structural relation information of data object;
The structural relation r/w cell is used for setting up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object;
The structure attribute r/w cell is used for writing the sign, attribute information of this layer, the sign of data structure cell of last layer under it at each data structure cell;
The data object r/w cell, for the information that deposits data object at object database in, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information; Described data object r/w cell comprises:
Data object is write interface unit, deposits the information of data object in by the interface unit of object database;
The sign r/w cell is used to each independently data object generation object identity;
The information r/w cell is for the data object unit that the information of described data object is write described object identity appointment.
Optionally, described incidence relation database adopts the SQlite database.
Optionally, described data object unit adopts the XML file layout.
The present invention also provides a kind of device of read data, comprising:
Structural relation information is read the unit, is used for the structural relation information between incidence relation database reading out data object; Described structural relation information is read the unit, comprising:
Structural relation information is read interface unit, is used for the structural relation information by the interface unit reading out data object of incidence relation database;
Structure attribute is read the unit, is used for reading the sign of data structure cell of sign, attribute information, the last layer under it of this layer of each data structure cell;
Structural relation is read the unit, obtains structural relation between the data object according to a plurality of data structure cells with hierarchical relationship;
Data object is read the unit, is used for according to described structural relation information the information of reading out data object in object database; Described data object is read the unit, comprising:
Data object is read interface unit, is used for the information by the interface unit reading out data object of object database;
Sign is read the unit, is used for reading each independently object identity of data object;
Information is read the unit, is used for reading from the data object unit of described object identity appointment the information of described data object.
Optionally, described incidence relation database adopts the SQlite database.
Optionally, described data object unit adopts the XML file layout.
Compared with prior art, technical scheme of the present invention overcomes separately Shortcomings of XML and SQLite.For the data object with structure, the characteristics of both having utilized the XML file layout to store very flexibly data, utilized again the characteristics of SQLite database to solve tree form data structure and specifically data storage and the problem of sharing in the reality exploitation, reduce shared memory space in the data sharing, promote processing speed, reducing development cost.
Description of drawings
Fig. 1 is the process flow diagram of writing the method for data of the present invention;
Fig. 2 is the process flow diagram of the method for read data of the present invention;
Fig. 3 is the functional structure chart of writing the device of data of the present invention;
Fig. 4 is the functional structure chart of the embodiment one of structural relation information r/w cell of the present invention;
Fig. 5 is the functional structure chart of the embodiment two of structural relation information r/w cell of the present invention;
Fig. 6 is the functional structure chart of the embodiment one of data object r/w cell of the present invention;
Fig. 7 is the functional structure chart of the embodiment two of data object r/w cell of the present invention;
Fig. 8 is the functional structure chart of the device of read data of the present invention;
Fig. 9 is the functional structure chart that structural relation of the present invention is read the embodiment one of unit;
Figure 10 is the functional structure chart that structural relation of the present invention is read the embodiment two of unit;
Figure 11 is the functional structure chart that data object of the present invention is read the embodiment one of unit;
Figure 12 is the functional structure chart that data object of the present invention is read the embodiment two of unit.
Embodiment
Write the method for data, read data and write the device of data and the device of read data is described in detail of the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the process flow diagram of writing the method for data of the present invention.The method of write data comprises:
Step S101 deposits the structural relation information between the data object in the incidence relation database.
Described incidence relation database can adopt the SQlite database.
The described structural relation information that deposits data object in specifically comprises:
Set up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object;
In each data structure cell, write the sign of data structure cell of sign, attribute information, the last layer under it of this layer.
In one embodiment, data object can be e-book, and its data structure comprises several levels: e-book, chapter, joint and page or leaf, wherein e-book is that superstructure, the chapter of chapter are that superstructure, the joint that saves is the superstructure of page or leaf.In this step, adopt the SQlite database, then the data structure cell of model e-book, chapter, joint and page or leaf writes attribute information in these data structure cells, comprise the layer sign of this layer, such as chapter data structure cell, joint number according to structural unit; Other attribute information is such as information such as creation-time, update times; And the upper strata of the data cell of the last layer of this layer sign, just refer to the book data structure cell such as the upper strata sign of chapter data structure cell.
In one embodiment, can deposit by the interface unit of incidence relation database the structural relation information of data object in.
Step S102 deposits the information of data object in object database, each data object has the unique object identity of the overall situation.
Deposit the information of data object in the described object database in, comprising:
For each independently data object produce object identity;
The information of described data object is write the data object unit of described object identity appointment.
In one embodiment, can deposit by the interface unit of object database the information of data object in.
In the present embodiment, described data object unit adopts the XML file layout, and the concrete steps that deposit the information of data object in object database in are:
Obtain store path, obtain the structural relation information of data object by system interface, be used for the store path of object database.The structural information of described data object shows as external storage directory, under No. 1 file sub-directory such as c packing catalogue.
Produce the unique sign of overall situation as the title of XML file;
By interface unit data writing attribute and information content in described XML file, the attribute of described data object comprises the information of described data object and the index relative between the described structural relation information.As, comprise in the attribute of the page data object unit that the page data structural unit is corresponding the page data structural unit the layer flag information.
In one embodiment, in the page data object, may further include: lteral data object, image data object and other different types of data objects.Can in data object, can further form hierarchical structure so.Be the ground floor structure such as the page data object, the page or leaf lteral data object in corresponding this page or leaf is second layer structure with a page image data object.Layer structure like this embodies as the title of XML file by producing the unique sign of the overall situation, and carries out association with this.
Fig. 2 is the process flow diagram of the method for read data of the present invention.The method of described read data comprises:
Step S201, the structural relation information in the incidence relation database between the reading out data object.
Described incidence relation database can adopt the SQlite database.
The structural relation information of described reading out data object specifically comprises:
Read the sign of data structure cell of sign, attribute information, the last layer under it of this layer in each data structure cell;
Obtain structural relation between the data object according to a plurality of data structure cells with hierarchical relationship.
In one embodiment, the information of first reading out data structural unit comprises sign, the attribute information of this layer, the sign of the data structure cell of its described last layer.In the page data structural unit, the sign of this layer is page or leaf, and the sign of the data structure cell of last layer is chapter, and attribute information can comprise creation-time, update time and other relevant informations of this page.And then, obtain structural relation between the data object according to a plurality of data structure cells with hierarchical relationship.As, belong to a joint number according to several page structure unit under the structural unit, belong to a page structure unit under the chapter data structure cell, thereby obtain the structural relation between the data object.
In one embodiment, can pass through the structural relation information of the interface unit reading out data object of incidence relation database.
Step S202, according to described structural relation information, the information of reading out data object in object database.
The information of described reading out data object specifically comprises:
Read each independently object identity of data object;
Read the information of described data object from the data object unit of described object identity appointment.
Described according to structural relation information, refer to that described structural relation information and the object identity of corresponding data object have index relative.According to described index relative, read the object identity with the corresponding data object of described structural relation information.In one embodiment, can obtain the structural relation information of data object by system interface, be used for the store path of object database.The structural information of described data object shows as external storage directory, under No. 1 file sub-directory such as c packing catalogue.And then obtain the object identity of corresponding data object.Then, read the information of described data object from the data object unit of described object identity appointment.
In one embodiment, can read the page data object according to structural information, comprise a concrete e-book such as page structure information, a concrete chapter, one specifically saves.Can obtain the structural relation information of data object by system interface, be used for the store path of object database.The structural information of described data object shows as external storage directory, under No. 1 file sub-directory such as c packing catalogue.And then the filename of acquisition page data object.Read the information of described page data object according to this document name.Described data object unit adopts the XML file layout.
In one embodiment, in the page data object, may further include: lteral data object, image data object and other different types of data objects.Can in data object, can further form hierarchical structure so.Be the ground floor structure such as the page data object, the page or leaf lteral data object in corresponding this page or leaf is second layer structure with a page image data object.In one embodiment, such layer structure can embody as the title of XML file by producing the unique sign of the overall situation, and carries out association with this.When reading the page data object, obtain its hierarchical structure relation according to filename.
Fig. 3 is the functional structure chart of writing the device of data of the present invention.The device 1 of write data comprises: structural relation information r/w cell 11 and data object r/w cell 12.
Described structural relation information r/w cell 11 is for the structural relation information that deposits at the incidence relation database between the data object.
Described data object r/w cell 12, for the information that deposits data object at object database in, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information.
Fig. 4 is the functional structure chart of the embodiment one of structural relation information r/w cell of the present invention.Described structural relation information r/w cell 11, the structural relation information for depositing at the incidence relation database between the data object comprises: structural relation r/w cell 111 and structure attribute r/w cell 112.
Described structural relation r/w cell 111 is used for setting up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object.
Described structure attribute r/w cell 112 is used for writing the sign, attribute information of this layer, the sign of data structure cell of last layer under it at each data structure cell.
Fig. 5 is the functional structure chart of the embodiment two of structural relation information r/w cell of the present invention.Described structural relation information r/w cell 11 comprises: structural relation r/w cell 111, structure attribute r/w cell 112 and structural relation information are write interface unit 113.
Described structural relation r/w cell 111 is used for setting up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object.
Described structure attribute r/w cell 112 is used for writing the sign, attribute information of this layer, the sign of data structure cell of last layer under it at each data structure cell.
Described structural relation information is write interface unit 113, is used for depositing in by the interface unit of incidence relation database the structural relation information of data object.
Fig. 6 is the functional structure chart of the embodiment one of data object r/w cell of the present invention.Described data object r/w cell 12, for the information that deposits data object at object database in, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information.It comprises, sign r/w cell 121 and information r/w cell 122.
Described sign r/w cell 121 is used to each independently data object generation object identity.
Described information r/w cell 122 is for the data object unit that the information of described data object is write described object identity appointment.
Fig. 7 is the functional structure chart of the embodiment two of data object r/w cell of the present invention.Described data object r/w cell 12, for the information that deposits data object at object database in, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information.It comprises, sign r/w cell 121, and information r/w cell 122 and data object are write interface unit 123.
Described sign r/w cell 121 is used to each independently data object generation object identity.
Described information r/w cell 122 is for the data object unit that the information of described data object is write described object identity appointment.
Described data object is write interface unit 123, deposits the information of data object in by the interface unit of object database.
Fig. 8 is the functional structure chart of the device of read data of the present invention.The device 2 of described read data comprises: structural relation information reads unit 21 and data object is read unit 22.
Described structural relation information is read unit 21, is used for the structural relation information between incidence relation database reading out data object.
Described data object is read unit 22, is used for according to described structural relation information the information of reading out data object in object database.
Fig. 9 is the functional structure chart that structural relation of the present invention is read the embodiment one of unit.Described structural relation is read unit 21, is used for the structural relation information between incidence relation database reading out data object, and comprising: structure attribute reads unit 211 and structural relation is read unit 212.
Described structure attribute degree unit 211 is used for reading the sign of data structure cell of sign, attribute information, the last layer under it of this layer of each data structure cell.
Described structural relation is read unit 212, for the structural relation of obtaining according to a plurality of data structure cells with hierarchical relationship between the data object.
Figure 10 is the functional structure chart that structural relation of the present invention is read the embodiment two of unit.Described structural relation is read unit 21, is used for the structural relation information between incidence relation database reading out data object, and comprising: structure attribute is read unit 211, and structural relation reads unit 212 and structural relation information is read interface unit 213.
Described structure attribute degree unit 211 is used for reading the sign of data structure cell of sign, attribute information, the last layer under it of this layer of each data structure cell.
Described structural relation is read unit 212, for the structural relation of obtaining according to a plurality of data structure cells with hierarchical relationship between the data object.
Described structural relation information is read interface unit 213, is used for the structural relation information by the interface unit reading out data object of incidence relation database.
Figure 11 is the functional structure chart that data object of the present invention is read the embodiment one of unit.Described data object is read unit 22, is used for according to described structural relation information, and the information of reading out data object in object database comprises: sign reads unit 221 and information is read unit 222.
Described sign is read unit 221, is used for reading each independently object identity of data object.
Described information is read unit 222, is used for reading from the data object unit of described object identity appointment the information of described data object.
Figure 12 is the functional structure chart that data object of the present invention is read the embodiment two of unit.Described data object is read unit 22, is used for according to described structural relation information, and the information of reading out data object in object database comprises: sign is read unit 221, and information reads unit 222 and data object is read interface unit 223.
Described sign is read unit 221, is used for reading each independently object identity of data object.
Described information is read unit 222, is used for reading from the data object unit of described object identity appointment the information of described data object.
Described data object is read interface unit 223, is used for the information by the interface unit reading out data object of object database.
The technical scheme of embodiments of the invention overcomes separately Shortcomings of XML and SQLite.For the data object with structure, the characteristics of both having utilized the XML file layout to store very flexibly data, utilized again the characteristics of SQLite database to solve tree form data structure and specifically data storage and the problem of sharing in the reality exploitation, reduce shared memory space in the data sharing, promote processing speed, reducing development cost.
More than disclose many aspects of the present invention and embodiment, it will be understood by those skilled in the art that other side of the present invention and embodiment.Disclosed many aspects and embodiment just are used for illustrating among the present invention, are not to be limitation of the invention, and real protection domain of the present invention and spirit should be as the criterion with claims.
Claims (12)
1. a method of writing data is characterized in that, comprising:
Interface unit by the incidence relation database deposits the structural relation information between the data object in the incidence relation database; The described structural relation information that deposits data object in comprises:
Set up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object;
In each data structure cell, write the sign of data structure cell of sign, attribute information, the last layer under it of this layer;
Deposit the information of data object in object database in by the interface unit of object database, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information; The described information that deposits data object in of stating comprises:
For each independently data object produce object identity;
The information of described data object is write the data object unit of described object identity appointment.
2. the method for writing data as claimed in claim 1 is characterized in that, described incidence relation database adopts the SQlite database.
3. the method for writing data as claimed in claim 1 is characterized in that, described data object unit adopts the XML file layout.
4. the method for a read data is characterized in that, comprising:
Interface unit structural relation information between the reading out data object in the incidence relation database by the incidence relation database; The structural relation information of described reading out data object specifically comprises:
Read the sign of data structure cell of sign, attribute information, the last layer under it of this layer in each data structure cell;
Obtain structural relation between the data object according to a plurality of data structure cells with hierarchical relationship;
According to described structural relation information, the information of the interface unit reading out data object in object database by object database; The information of described reading out data object specifically comprises:
Read each independently object identity of data object;
Read the information of described data object from the data object unit of described object identity appointment.
5. the method for read data as claimed in claim 4 is characterized in that, described incidence relation database adopts the SQlite database.
6. the method for read data as claimed in claim 4 is characterized in that, described data object unit adopts the XML file layout.
7. a device of writing data is characterized in that, comprising:
Structural relation information r/w cell is for the structural relation information that deposits at the incidence relation database between the data object; Described structural relation information r/w cell comprises:
Structural relation information is write interface unit, is used for depositing in by the interface unit of incidence relation database the structural relation information of data object;
The structural relation r/w cell is used for setting up a plurality of data structure cells with hierarchical relationship according to the structural relation between the data object;
The structure attribute r/w cell is used for writing the sign, attribute information of this layer, the sign of data structure cell of last layer under it at each data structure cell;
The data object r/w cell, for the information that deposits data object at object database in, each data object has the unique object identity of the overall situation, has index relative between the information of described data object and the described structural relation information; Described data object r/w cell comprises:
Data object is write interface unit, deposits the information of data object in by the interface unit of object database;
The sign r/w cell is used to each independently data object generation object identity;
The information r/w cell is for the data object unit that the information of described data object is write described object identity appointment.
8. the device of writing data as claimed in claim 7 is characterized in that, described incidence relation database adopts the SQlite database.
9. the device of writing data as claimed in claim 7 is characterized in that, described data object unit adopts the XML file layout.
10. the device of a read data is characterized in that, comprising:
Structural relation information is read the unit, is used for the structural relation information between incidence relation database reading out data object; Described structural relation information is read the unit, comprising:
Structural relation information is read interface unit, is used for the structural relation information by the interface unit reading out data object of incidence relation database;
Structure attribute is read the unit, is used for reading the sign of data structure cell of sign, attribute information, the last layer under it of this layer of each data structure cell;
Structural relation is read the unit, obtains structural relation between the data object according to a plurality of data structure cells with hierarchical relationship;
Data object is read the unit, is used for according to described structural relation information the information of reading out data object in object database; Described data object is read the unit, comprising:
Data object is read interface unit, is used for the information by the interface unit reading out data object of object database;
Sign is read the unit, is used for reading each independently object identity of data object;
Information is read the unit, is used for reading from the data object unit of described object identity appointment the information of described data object.
11. the device of read data as claimed in claim 10 is characterized in that, described incidence relation database adopts the SQlite database.
12. the device of read data as claimed in claim 10 is characterized in that, described data object unit adopts the XML file layout.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035993A (en) * | 2014-06-10 | 2014-09-10 | 江苏凤凰优阅信息科技有限公司 | Memory search method for e-books, e-book management system and reading system |
| CN104169914A (en) * | 2013-12-11 | 2014-11-26 | 华为技术有限公司 | Data storage method, data processing method, device and mobile terminal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965316A (en) * | 2004-04-09 | 2007-05-16 | 甲骨文国际公司 | Index for accessing XML data |
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2011
- 2011-08-30 CN CN2011102518149A patent/CN102955815A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965316A (en) * | 2004-04-09 | 2007-05-16 | 甲骨文国际公司 | Index for accessing XML data |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104169914A (en) * | 2013-12-11 | 2014-11-26 | 华为技术有限公司 | Data storage method, data processing method, device and mobile terminal |
| CN104035993A (en) * | 2014-06-10 | 2014-09-10 | 江苏凤凰优阅信息科技有限公司 | Memory search method for e-books, e-book management system and reading system |
| CN104035993B (en) * | 2014-06-10 | 2017-12-19 | 江苏凤凰优阅信息科技有限公司 | Memory search method, e-book management system, the reading system of e-book |
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