CN104484177A - Mybatis namespace mapping method - Google Patents

Abstract

The invention discloses a mybatis namespace mapping method. The method comprises the following steps of matching a namespace in an SQLMapper file and a mapping name prefix provided by a configuration file; while resolving the namespace, judging whether the namespace is a complete name or not, if the namespace is a complete name, avoiding mapping, and if the namespace is not a complete name, adding the premix and mapping. Consequently, in an item transplantation process, as long as the mapping name prefix of the configuration file is modified, mapping and calling of different interface files with prefixes can be finished under the condition of not modifying the namespace of the SQLMapper file, so that the item localization implementation and transplantation costs are effectively lowered and the development efficiency is improved.

Description

A kind of method that mybatis NameSpace maps

Technical field

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

Background technology

In the exploitation of current management information system databases, data access persistent layer ORM framework (as mybatis, hibernate) uses more and more.ORM framework adopts metadata to carry out description object one relationship map details, and metadata generally adopts XML format, and leaves in special object one mapped file.As long as provide the mapped file of lasting classification and database, ORM framework operationally just can with reference to the information of mapped file, Object Persistence in database.

In mybatis, developer needs to provide lasting classification and sqlmapper mapped file.By under interface mode method of calling, require NameSpace and interface fully qualified name correspondence in sqlmapper file.When calling interface, the SQL statement statmentid under corresponding NameSpace can be found by reflection technology.In project transplanting or localized implementation process, the bag name of interface usually needs change, and this can cause the NameSpace needing to revise a large amount of sqlmapper files.Mybatis provides calling of interface mappings mode, brings conveniently to developer.But require that in SQLMapper file, namespace must set consistent with the fully-qualified name of interface.Project is in localized implementation process, and needing bag path setting is the value of specifying.In SQLMapper files a large amount of like this, namespace may need amendment, and relevant calling also needs amendment.Implant system application cost is relatively high, and efficiency is also low.

Therefore, need a kind of new technical scheme to solve the problem.

Summary of the invention

The object of the invention is the deficiency existed for prior art, a kind of method that mybatis NameSpace maps is provided, when not revising sqlmapper NameSpace, complete the mapping with interface fully-qualified name by what revise bag prefix.

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

The method that mybatis NameSpace maps, comprises the following steps:

(a), first in chassis configuration file, registration provides the prefix of NameSpace, uses configuration attribute propertie to register, and comprises type and value that registration maps in attribute propertie;

Can according to the relevant information of registered propertie information analysis to short name prefix when (b), framework start-up loading, and the mapping of all NameSpace values completing short name and be resolved to; First framework resolves the NameSpace of sql mapped file, judges whether it is fully-qualified name according to canonical, if not, then map according to short name prefix;

If c () NameSpace is fully-qualified name, obtains this NameSpace and be added into buffer area, if not, then read short name prefix and carry out combinatorial mapping with NameSpace become fully-qualified name and be added into buffer zone;

(d), when user's calling interface, obtain interface fully-qualified name by reflection, and search corresponding sql mapping to buffer area, finally complete calling of sql statement.

NameSpace mapping method disclosed in this invention, realizes based on canonical method.Map Names prefix NameSpace and configuration file in sqlmapper file provided is mated.When resolving NameSpace, judge whether NameSpace is complete name, if this does not need to map, if not then add that prefix maps.Like this in project migration process, only need the Map Names prefix revising configuration file.When not revising SQLMapper file name space, the mapping of the interface document of different bag prefix can be completed and call, the cost that effective reduction project localization is implemented and transplanted, improving development efficiency.

Embodiment

To be described this in detail with bright preferred embodiment below.Short name of the present invention maps and adopts java exploitation, and configuration file underlying attribute is propertie, and this attribute is used for registering short name configuration information, mainly realizes following content:

Configuration information title, this title keeps unique in the frame

The value of configuration information can be concrete value, also can be the value of regular expression

In order to use log-on message more specification, mybatis NameSpace short name of the present invention maps and adopts key-value pair log-on message (being certainly technically not limited to use key-value pair), thus propertie attribute general description as:

The present invention will disclose the method for a mybatis NameSpace mapping, when not revising SQLMapper file name space, the mapping of the interface document of different bag prefix can be completed and call, the cost that effective reduction project localization is implemented and transplanted, improving development efficiency.

NameSpace mapping method disclosed in this invention, realizes based on canonical method.Map Names prefix NameSpace and configuration file in sqlmapper file provided is mated.When resolving NameSpace, judge whether NameSpace is complete name, if this does not need to map, if not then add that prefix maps.Like this in project migration process, only need the Map Names prefix revising configuration file.

Claims (1)

1. a method for mybatis NameSpace mapping, is characterized in that, comprise the following steps:

(a), first in chassis configuration file, registration provides the prefix of NameSpace, uses configuration attribute propertie to register, and comprises type and value that registration maps in attribute propertie;

Can according to the relevant information of registered propertie information analysis to short name prefix when (b), framework start-up loading, and the mapping of all NameSpace values completing short name and be resolved to; First framework resolves the NameSpace of sql mapped file, judges whether it is fully-qualified name according to canonical, if not, then map according to short name prefix;

If c () NameSpace is fully-qualified name, obtains this NameSpace and be added into buffer area, if not, then read short name prefix and carry out combinatorial mapping with NameSpace become fully-qualified name and be added into buffer zone;

(d), when user's calling interface, obtain interface fully-qualified name by reflection, and search corresponding sql mapping to buffer area, finally complete calling of sql statement.