CN104484177B

CN104484177B - A kind of method of mybatis NameSpaces mapping

Info

Publication number: CN104484177B
Application number: CN201410788407.5A
Authority: CN
Inventors: 苏祖辉; 支兵
Original assignee: Nanjing LES Information Technology Co. Ltd
Current assignee: Nanjing LES Information Technology Co. Ltd
Priority date: 2014-12-17
Filing date: 2014-12-17
Publication date: 2017-12-05
Anticipated expiration: 2034-12-17
Also published as: CN104484177A

Abstract

The invention discloses a kind of method of mybatis NameSpaces mapping, the Map Names prefix that NameSpace and configuration file in sqlmapper files provide is matched.When parsing NameSpace, judge whether NameSpace is complete name, if this is not required to be mapped, if not then being mapped plus prefix.So in project migration process, the Map Names prefix of modification configuration file is only needed, in the case where not changing SQLMapper file name spaces, mapping and the calling of the interface document of different bag prefixes can be completed, the cost that project localization is implemented and transplanted effectively is reduced, improves development efficiency.

Description

A kind of method of mybatis NameSpaces mapping

Technical field

The present invention relates to database development technical field, especially a kind of method of framework NameSpace mapping.

Background technology

In current management information system databases exploitation, data access persistent layer ORM frameworks (such as mybatis, Hibernate) using more and more.ORM frameworks are typically adopted using metadata come the relationship map details of description object one, metadata With XML format, and it is stored in the special mapped file of object one.As long as provide the mapping text of lasting classification and database Part, ORM frameworks operationally just can be with reference to the information of mapped file, Object Persistence into database.

In mybatis, developer needs to provide lasting classification and sqlmapper mapped files.Passing through interface mode Under method of calling, it is desirable to which NameSpace and interface fully qualified name are corresponding in sqlmapper files., can when calling interface To find the SQL statement statmentid under corresponding NameSpace by reflection technology.Transplant or localize in project and implement During, the bag name of interface usually needs to change, and this can result in the need for the NameSpace for changing substantial amounts of sqlmapper files. Mybatis provides the calling of interface mappings mode, is brought conveniently to developer.But it is required that in SQLMapper files Namespace must set consistent with the fully-qualified name of interface.Project is in implementation process is localized, it is necessary to which bag path is set It is set to the value specified.Namespace may be needed to change in this large amount of SQLMapper files, and related calling is also required to Modification.Implant system application cost is of a relatively high, and efficiency is also low.

Therefore, it is necessary to a kind of new technical scheme is to solve the above problems.

The content of the invention

The purpose of the present invention is in view of the deficienciess of the prior art, providing a kind of side of mybatis NameSpaces mapping Method, in the case of not changing sqlmapper NameSpaces, by changing the completion of bag prefix and reflecting for interface fully-qualified name Penetrate.

For achieving the above object, the present invention can adopt the following technical scheme that：

A kind of method of mybatis NameSpaces mapping, comprises the following steps：

(a), registration provides the prefix of NameSpace first in framework configuration file, uses configuration attribute propertie To register, the type and value of registration mapping are included in attribute propertie；

(b), can be believed during framework start-up loading according to the correlation of registered propertie information analyses to short name prefix Breath, and complete short name and the mapping of all NameSpace values being resolved to；The name that framework parses sql mapped files first is empty Between, judge whether it is fully-qualified name according to canonical, if it is not, then being mapped according to short name prefix；

(c), obtain the NameSpace if NameSpace is fully-qualified name and be added to buffer area, if not It is then to read short name prefix and be combined with NameSpace and be mapped to fully-qualified name and be added to buffering area；

(d), when user's calling interface, interface fully-qualified name is obtained by reflecting, and arrive corresponding to buffer area lookup Sql maps, and is finally completed the calling of sql sentences.

NameSpace mapping method disclosed in this invention, realized based on canonical method.By in sqlmapper files The Map Names prefix that NameSpace and configuration file provide is matched.When parsing NameSpace, whether NameSpace is judged It is complete name, if this is not required to be mapped, if not then being mapped plus prefix.So in project migration process, only Need the Map Names prefix of modification configuration file.In the case where not changing SQLMapper file name spaces, can complete not Mapping and calling with the interface document of bag prefix, the cost that project localization is implemented and transplanted effectively is reduced, improves exploitation effect Rate.

Embodiment

Described in detail below with bright preferred embodiment.The short name mapping of the present invention is developed using java, configuration File underlying attribute is propertie, and the attribute is used for registering short name configuration information, mainly realizes herein below：

Configuration information title, the title keep unique in the frame

The value of configuration information, can be specific value or the value of regular expression

In order that with log-on message more specification, mybatis NameSpaces short name of the invention mapping is registered using key-value pair Information (is technically not limited to use key-value pair) certainly, so propertie attributes general description is such as：

The method that the present invention will disclose a mybatis NameSpaces mapping, do not changing SQLMapper file designations sky Between in the case of, mapping and the calling of the interface document of different bag prefixes can be completed, effectively reduce project localization implement and The cost of transplanting, improve development efficiency.

NameSpace mapping method disclosed in this invention, realized based on canonical method.By in sqlmapper files The Map Names prefix that NameSpace and configuration file provide is matched.When parsing NameSpace, whether NameSpace is judged It is complete name, if this is not required to be mapped, if not then being mapped plus prefix.So in project migration process, only Need the Map Names prefix of modification configuration file.

Claims

A kind of 1. method of mybatis NameSpaces mapping, it is characterised in that comprise the following steps：

(a), registration provides the prefix of NameSpace first in framework configuration file, is come using configuration attribute propertie Register, the type and value of registration mapping are included in attribute propertie；

(b), during framework start-up loading can according to the relevant information of registered propertie information analyses to short name prefix, And complete short name and the mapping of all NameSpace values being resolved to；Framework parses the NameSpace of sql mapped files, root first Judge whether it is fully-qualified name according to canonical；

(c), obtain the NameSpace if NameSpace is fully-qualified name and be added to buffer area, if it is not, then Read short name prefix and be combined with NameSpace and be mapped to fully-qualified name and be added to buffering area；(d), when user calls During interface, interface fully-qualified name is obtained by reflecting, and to sql mappings corresponding to buffer area lookup, is finally completed sql sentences Calling.