CN102937992A - Object mapping transformation design method based on Java and X extensive makeup language (XML) database - Google Patents
Object mapping transformation design method based on Java and X extensive makeup language (XML) database Download PDFInfo
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- CN102937992A CN102937992A CN2012104321943A CN201210432194A CN102937992A CN 102937992 A CN102937992 A CN 102937992A CN 2012104321943 A CN2012104321943 A CN 2012104321943A CN 201210432194 A CN201210432194 A CN 201210432194A CN 102937992 A CN102937992 A CN 102937992A
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Abstract
Disclosed is an object mapping transformation design method based on a Java and X extensive makeup language (XML) database. The method includes the steps of step one, defining configuration files; step two, generating character strings which accord with the XML standards by a specific language XQUERY of the XML database through XQuery for Java (XQJ); step three, generating a Java object through a configured mapping relation, or generating a series data by configuring extensible stylesheet language (XSL); and step four, searching Xquery sentences in the configuration files by an XML path language (xpath), acquiring return types of the configuration files, and finally returning required data.
Description
Technical field
The present invention relates to a kind of object map conversion designs method, particularly a kind of object map conversion designs method based on Java and XML database.
Background technology
Object Relation Mapping (Object/Relation Mapping is called for short ORM) produces along with OO software development methodology development.OO development approach is the main flow development approach in the current enterprise-level application development environment, and relational database is the mainstream data storage system of permanent store data in the enterprise-level application environment.Object and relation data are two kinds of forms of expression of Business Entity, and Business Entity shows as object in internal memory, show as relation data in database.Have association and inheritance between the object in the internal memory, and in database, relation data can't directly be expressed multi-to-multi association and inheritance.Therefore, Object Relation Mapping (ORM) system generally exists with the form of middleware, realizes that mainly program object is to the mapping of relation data database data.
Object-oriented is that the basis from soft project cardinal rule (such as coupling, polymerization, encapsulation) grows up, and relational database then develops from mathematical theory, and there is significant difference in two cover theories.In order to solve this unmatched phenomenon, the Object Relation Mapping technology is arisen at the historic moment, and Object Relation Mapping has had a lot of successful stories in relational database.But do not have this solution at the XML database, so on the demand of XML database development, in the urgent need to a kind of method that solves mapping relations between XML database and the object.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of object map conversion designs method based on Java and XML database is provided, thereby the physical layer interface that makes the user can be indifferent to XQJ is realized, only need by simple configuration, just can realize the objectification programming, thereby reach the minimizing learning cost, the purpose of Speeding up development speed.
The present invention is achieved through the following technical solutions:
A kind of object map conversion designs method based on Java and XML database, adopt following steps:
S1, definition configuration file;
S2, use the language-specific XQUERY query generation of XML database to meet the character string of XML standard by XQJ;
S3, the mapping relations generation Java object by configuring are perhaps by providing configuration XSL to generate a series of data;
S4, by the Xquery statement in the xpath retrieval configuration file, and obtain return type in the configuration file, return at last needed data.
Better, the mapping relations by configuration generate the Java object and comprise by the XQUERY statement and directly generate the Java object.
Better, configuration file comprises master configuration file and sub-configuration file.
Better, dispose the path of global parameter, sub-configuration file and the realization class definition of database XQJ in the master configuration file.
Better, a series of data comprise HTML, XML and PDF data.
Better, generating in the JAVA object in the mapping relations by configuration, mapping relations adopt the configuration style of XStream.
Better, or by providing configuration XSL to generate in a series of data, comprise the path of direct configuration one XSL.
Better, or by providing configuration XSL to generate in a series of data, comprise and import an XSL into.
Description of drawings
Fig. 1 is the code sequential chart of a preferred embodiment of the present invention;
Fig. 2 is relational database process flow diagram under development;
Fig. 3 is the process flow diagram of the present invention in the XML database development.
Embodiment
Below in conjunction with embodiment the present invention is elaborated, the present embodiment is implemented under take technical solution of the present invention as prerequisite, has provided detailed embodiment, but protection scope of the present invention is not limited to following embodiment.
JDBC is JSR(Java Specification Requests, the Java specification request) a cover standard of definition is the mutual a kind of method of relational database and java, in the XML database in, XQJ also is the cover standard that JSR formulates, and is the mutual a kind of method of XML database and java.In the ORM of traditional sense, depend on JDBC, generate record by SQL statement, then by the configuration returning an object value.
In the XML database, the present invention propose by XQJ use the XML database language-specific XQUERY query generation one or more meet the character string of XML standard, mapping relations by the configuration file configuration generate the Java object, perhaps by configuration XSL(Extensible Stylesheet Language (XSL), EXtensible Stylesheet Language are provided) a series of specific data (for example, the HTML of generation, XML, PDF), wherein, XSL is a kind of language for present the XML data with readable format; Like this, the user only need pass through the XQUERY statement, just can realize directly generating the Java object, is generating in a series of data such as HTML, XML, PDF by configuration XSL, and here, configuration XSL can be the path of an XSL of direct configuration, perhaps imports an XSL into; Then, a language of in the documents such as XML, searching information by xpath(xpath, navigate by element and attribute) retrieve the Xquery statement in the configuration file, and obtain the return type in the configuration file, return at last the data that the user needs.
Wherein, configuration file is divided into master configuration file and sub-configuration file.
Master configuration file comprises: self-defined global parameter, and sub-Profile Path, XQJ realizes the definition of class, for example can realize by following statement:
Wherein, the Configuration element is root element, the Properties element is custom parameter, the Include element can comprise a .properties file, the Propertie element can directly define a sub-configuration file, xqueryMap is sub-Profile Path, and the resultClass element is the serializing class in the return type.
Sub-configuration file for example can be realized by following statement:
Wherein, entry_collection among the $ [entry_collection] is the global variable that defines in the configuration file, { name} is the key among the parameterClass to $, #{age} also is the key among the parameterClass, difference is that { name} is a kind of alternative patterns to $, and #{age} is based on a kind of injection mode of XQJ.
Described injection mode has two kinds, and the first is substitute mode, is specially the character string alternative patterns; Another kind is based on the compiling injection mode of XQJ, because first kind of way is the mode of substitute character string, in the engineering of substitute character string, might write the code with logic, cause data to reveal or Missing data, and inject by second way compiling, can effectively avoid this problem, guaranteed the security of data.
In java, pass through:
List＜Booklet〉and list=queryForList ("/system/queryLet ", map); Inquire object for the user.
The below provides one embodiment of the invention, in order to understand:
Please refer to Fig. 1, define first master configuration file a: CommConfig.xml.In this configuration file, configured sub-configuration file and the global variable at query statement place, this configuration file for example can be realized by following statement:
List<Booklet>list=queryForList("/system/queryLet",map);
Then, the user adopts identifier to pass through ConfigManager(configuration file management class) search out dynamic XQUERY statement, then send the dynamic XQUERY statement that searches out to the XML database by XQJ, and return the character string that meets the XML standard, by ConfigManager(configuration file management class) the type of return results and object serialization kit be back into the Java object that the user needs.Wherein, XStream is a kind of kit that is used for XML and java object map of increasing income.
Please refer to Fig. 2 and Fig. 3.Fig. 2 is relational database process flow diagram under development, in relational database, the user uses SQL statement to generate record by JDBC, is back into the Java object that the user needs by the object serialization kit again, could generate a series of specific data by technology such as JSP at last.Fig. 3 is the process flow diagram of the present invention in the XML database development, can find by contrast, the present invention propose by XQJ use the XML database language-specific XQUERY query generation one or more meet the character string of XML standard, mapping relations by configuration generate the Java object, perhaps by configuration XSL(EXtensible Stylesheet Language is provided) a series of specific data (HTML of generation, XML, PDF), the user uses the method can realize inquiring about fast, and do not need to pay close attention to the realization of the physical layer interface of XQJ, only need by simple configuration, just can realize the objectification programming, generate faster and more easily the needed data of user, realized fast Development, the target of Cost reduction.
Above disclosed be the application's preferred embodiment only, but the application is not limited thereto, the changes that any person skilled in the art can think of all should drop in the application's the protection domain.
Claims (8)
1. the object map conversion designs method based on Java and XML database is characterized in that, adopts following steps:
S1, definition configuration file;
S2, use the language-specific XQUERY query generation of XML database to meet the character string of XML standard by XQJ;
S3, the mapping relations generation Java object by configuring are perhaps by providing configuration XSL to generate a series of data;
S4, by the Xquery statement in the xpath retrieval configuration file, and obtain return type in the configuration file, return at last needed data.
2. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, directly generate the Java object described comprising by the XQUERY statement by the mapping relations generation Java object that configures.
3. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, described configuration file comprises master configuration file and sub-configuration file.
4. the object map conversion designs method based on Java and XML database as claimed in claim 3 is characterized in that, disposes the path of global parameter, sub-configuration file and the realization class definition of database XQJ in the described master configuration file.
5. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, described a series of data comprise HTML, XML and PDF data.
6. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, generates in the JAVA object in described mapping relations by configuration, and described mapping relations adopt the configuration style of XStream.
7. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, described or by provide the configuration XSL generate in a series of data, comprise the path of direct configuration one XSL.
8. the object map conversion designs method based on Java and XML database as claimed in claim 1 is characterized in that, described or by provide the configuration XSL generate in a series of data, comprise and import an XSL into.
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| CN107678806A (en) * | 2017-09-30 | 2018-02-09 | 北京酷我科技有限公司 | A kind of object type switchs to the method for type of database |
| CN108874944A (en) * | 2018-06-04 | 2018-11-23 | 刘洋 | A kind of isomeric data mapped system and method based on XSL language conversion |
| CN108874944B (en) * | 2018-06-04 | 2022-06-03 | 刘洋 | XSL language transformation-based heterogeneous data mapping system and method |
| CN112035707A (en) * | 2020-08-17 | 2020-12-04 | 深圳市中盛瑞达科技有限公司 | Operation conversion method and system |
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Application publication date: 20130220 |