CN101446965A - Data query method and system thereof - Google Patents

Data query method and system thereof Download PDF

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Publication number
CN101446965A
CN101446965A CNA2008101929255A CN200810192925A CN101446965A CN 101446965 A CN101446965 A CN 101446965A CN A2008101929255 A CNA2008101929255 A CN A2008101929255A CN 200810192925 A CN200810192925 A CN 200810192925A CN 101446965 A CN101446965 A CN 101446965A
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client
operating result
xmlhttp
server end
request object
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CN101446965B (en
Inventor
郑承满
李鹏
赵世辉
刘浩
董恒星
王成名
陈少静
程大庆
李镜忠
涂锟斌
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China Construction Bank Corp
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China Construction Bank Corp
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Abstract

The invention discloses a data query method, comprising the following steps: a customer terminal establishes an xmlhttp request object and a callback object, the xmlhttp request object asynchronously sends a http request distributed by the customer terminal to a server terminal, the server terminal receives and processes the http request and returns the operation result of a database to the xmlhttp request object after the server terminal interacts with the database, the callback object invokes the operation result from the xmlhttp request object, and the operation result is sent to the customer terminal and the customer terminal is updated. The invention also discloses a data query system. In the invention, by introducing an asynchronous communication mechanism, large amount of simultaneous interaction with the database is avoided, the expense of an application system is reduced, the operational pressure of the service terminal is reduced, meanwhile, the visiting pressure of the database is reduced and the efficiency of data query is improved.

Description

A kind of data enquire method and system
Technical field
The present invention relates to computer realm, relate in particular to a kind of data enquire method and system.
Background technology
Tree structure is a quasi-nonlinear data structure, and it has branch by the set with hierarchical relationship that limited node formed between node.In the inquiry of big data quantity, especially data are when storing with tree structure, and the efficient of inquiry just more receives publicity.
Existing it is that unit is submitted to the page with the list to the method for inquiring about with the data of tree structure storage as shown in Figure 1, and the flow process of this method is as follows:
Step 101, client send http (HTML (Hypertext Markup Language)) request and give server end.
Client can be that specific software also can be a general browser, Internet Explorer for example, Firefox, Opera etc.Client triggers the http request by button or button operation, and is sent to server end.
After step 102, server end receive the http request of client transmission, this http request is handled, and carried out alternately with database.
Step 103, database return to server end with operating result after carrying out the data query operation.
Step 104, server end returns http request responding information to client, and client is upgraded the page.
Step 105, client continue other operations.
Yet there is following defective at least in above-mentioned flow process:
At first, if only need a certain partial data of the page is upgraded, after client sends the http request, database will be inquired about on this page and return http request responding information with all data of this part correlation and by server end, client will refresh full page, cause the data query overhead, the waste massive band width;
Secondly, client triggers a http request by clicking a button, waiting for server end response then, click another button again and trigger another http request, and then waiting for server end response, such process repeatedly, client must wait for that the http request responding just can carry out next step operation, cause inefficient operation;
Moreover, if there are a plurality of parts to need more new data on the page, then database at one time section carry out query manipulation successively, cause bigger transient state inquiry pressure to database, cause this method lower to the practicality of data query in enormous quantities.
Summary of the invention
Technical matters to be solved by this invention is, a kind of search efficiency height, data enquire method and system that system overhead is low are provided.
For solving the problems of the technologies described above, the invention provides a kind of data enquire method, may further comprise the steps:
Client is created xmlhttp request object and callback object;
Described xmlhttp request object asks asynchronous transmission to server end the http of client distribution;
Described server end receives and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Described callback object calls described operating result from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
More preferably, also comprise:
Client is provided with call back function on described xmlhttp request object.
More preferably, before the operating result in described server end return data storehouse, also comprise:
Described server end is assembled into plain text format with the operating result of database.
More preferably, described plain text format is extending mark language xml.
More preferably, described callback object calls before the described operating result from described xmlhttp request object, also comprises:
Described xmlhttp request object is encapsulated as DOM Document Object Model DOM according to the operating result that described call back function will be assembled into the xml form.
More preferably, when the http request that described xmlhttp request object is distributed client is sent to server end, calls described call back function notice client and carry out other operations.
More preferably, described renewal client specifically comprises:
Upgrade the client local page according to described operating result.
More preferably, when network service is broken down, the described http request of buffer memory.
The present invention also provides a kind of data query system, comprises client, server end and database,
Described client is used to create xmlhttp request object and callback object, asks asynchronous transmission to server end http by described xmlhttp request object;
Described server end is used for receiving and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Described callback object calls described operating result from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
More preferably, described client also is used on described xmlhttp request object call back function being set.
More preferably, described server end also is used for the operating result of database is assembled into the xml form.
More preferably, the described xmlhttp request object operating result that also is used for will being assembled into according to described call back function the xml form is encapsulated as DOM Document Object Model DOM.
More preferably, described xmlhttp request object also is used for when the http request with the client distribution is sent to server end, calls described call back function notice client and carries out other operations.
The present invention also provides a kind of data query system, comprising:
First creation apparatus is used to create the xmlhttp request object;
Second creation apparatus is used to create callback object;
The http send-request unit is used for giving server end by the xmlhttp request object of creating with the http request asynchronous transmission of client distribution;
Data interaction device is used for reception and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Calling device is used for calling described operating result by described callback object from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
More preferably, described first creation apparatus also is used on described xmlhttp request object call back function being set.
More preferably, also comprise:
Apparatus for assembling is used for the operating result of database is assembled into the xml form, and is encapsulated as DOM Document Object Model DOM according to the operating result that described call back function will be assembled into the xml form.
More preferably, when the http request that described http send-request unit is distributed client was sent to server end, described xmlhttp request object called described call back function notice client and carries out other operations.
The present invention has avoided the mutual of in enormous quantities simultaneously and database by introducing asynchronous communication mechanism, has reduced the expense of application system, reduces the operating pressure of server end, has also reduced access of database pressure simultaneously, has improved efficiency data query.And the user need not waiting for server end response, just can carry out other operations simultaneously, improved user experience.
Description of drawings
Fig. 1 is the schematic flow sheet of available data querying method;
Fig. 2 is the schematic flow sheet of the embodiment of the invention one data enquire method;
Fig. 3 is the structural representation of the embodiment of the invention two data query systems;
Fig. 4 is the structural representation of the embodiment of the invention three data query systems.
Embodiment
The present invention introduces asynchronous query mechanism, this asynchronous query mechanism be a kind of be the interaction mechanism of principle with local asynchronous response, the variety of protocol of supporting with client self is (as the http agreement, xmlhttp (extending mark language http) agreement etc.) and interface standard (as DOM Document Object Model DOM) for relying on, adopt the method for time sharing segment to carry out asynchronous process alternately to data.
Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.
Please refer to shown in Figure 2ly, the embodiment of the invention one data enquire method may further comprise the steps:
Step 201, client triggers and creates the xmlhttp request object by button or button operation.
Xmlhttp is the agreement of client with the http-server communication, and client can send request to http-server by the xmlhttp request object.With the client is that browser is an example, the xmlhttp request object is embodied as an ActiveX object in IE, and other browser (as Firefox/Opera) then is embodied as the xmlhttp request object javascript (the OO script of a kind of prototyping) object an of this locality.
Step 202, client is created the client callback object.
Client readjustment is meant client script by front end to the corresponding data parameters of server end transmission, and server end is inquired about and handled with the parameter that receives again, at last the result is passed back to client and shows.
Step 203, client is provided with call back function on the xmlhttp request object of being created, inform that promptly which kind of the xmlhttp request object should use return object after request is finished and carry out returning client.
Owing to be to adopt asynchronous system to communicate, therefore a call back function need be set, system can call this call back function and inform which kind of the xmlhttp request object should use return object and carry out returning client after request is finished when data are returned.For example, can be by a call back function being set for the onreadystatechange attribute assignment of xmlhttp request object:
xmlhttp.onreadystatechange=function(){...};
Step 204, client is distributed to the xmlhttp request object with request.
Client can be distributed to the xmlhttp request object with the data query request that triggers by button or button.
Step 205, the xmlhttp request object is asked to the asynchronous submission of server end http.
The xmlhttp request object adopts asynchronous system to send to server end to the http request of client distribution, and therefore, for a plurality of http requests, the xmlhttp request object can carry out asynchronous process by time sharing segment.
Meanwhile, because the xmlhttp request object is by calling call back function notice client automatically, other are operated and do not have a correlativity with client again in the http request of submitting to simultaneously, and therefore client need not waited for that http request responding message is just returned and can proceed other operations this moment.
For sake of convenience, the follow-up flow process of present embodiment is that example is introduced with the http processing of request that the xmlhttp request object sends to server end.
Step 206, server end receive the htpp request back of xmlhttp request object transmission this http request are handled, and carry out alternately with database.
Step 207, database obtains operating result and returns to server end.
The step 206 of present embodiment, 207 respectively with the step 102 of existing method shown in Figure 1,103 identical.
Step 208, server end is assembled into the xml form with operating result.
Xml assembling is meant that data (being the operating result of database) that server end will send are assembled into the xml file of a specific format according to certain protocol packing.Need to prove, in the present embodiment, step 208 server end is not limited to xml with the form of operating result assembling, because xmlhttp supports the transmission of plain text, for example xml, javascript, plain etc., server end is translated into corresponding plain text format with operating result then.
The operating result that step 209, server will be assembled into the xml form returns to the xmlhttp request object of wait-for-response.
Step 210, xmlhttp request object are packaged into this operating result that returns according to call back function the DOM object of standard.
Because step 203 is when the xmlhttp request object is provided with call back function, call back function has informed which kind of the xmlhttp request object return object to client return result with, so the xmlhttp request object will adopt according to call back function and return object accordingly in this step.
In the present embodiment, return liking DOM, DOM is a document standard, and for complete document and complicated application program, DOM provides a large amount of dirigibilities, can avoid carrying out when API changes a large amount of rewritings.DOM uses a document type node to encapsulate whole xml file.
Step 211 is called this DOM object by callback object.
Step 212 is back to client by callback object with this DOM object, and upgrades client.
To resolve the DOM object that returns in client, parsing is meant analyzes deciphering to an xml file according to certain protocol, restores wherein described data (being the database manipulation result), is used for client and upgrades.Do not influence the current operation of client during renewal.
In addition, because the operating result of database is only relevant with this http request, so only need upgrade the data that this parsing obtains when upgrading client, i.e. the whole updating of the page is avoided or has been reduced in page local updating, has improved page response speed and user experience.
So far, a http request is finished.Other http requests for the asynchronous submission of step 205 with same execution in step 206~212, repeat no more herein.
Present embodiment also provides caching mechanism, when network service is broken down, can be with http request carrying out buffer memory, and fault is eliminated the back and is continued the subsequent flows journey, does not have the purpose of failure to reach request.
Present embodiment is applicable to needs inquiry in enormous quantities, but query actions can be distributed to the scene of each operation steps again, for example the data query of mechanism tree.Before client user's development mechanism is set each node, do not need to understand mechanism of lower floor situation, at this time just can be distributed to data query in the query manipulation of each development mechanism node and go mechanism of lower floor, utilize xmlhttp to ask the query requests of asynchronous submission, unnaming pressure to mechanism of lower floor.Like this, just avoided disposable expense from database recurrence constructive mechanism tree.
Referring again to shown in Figure 3, the embodiment of the invention two provides a kind of data query system, comprises client 301, server end 302 and database 303, wherein:
Described client 301 is used to create xmlhttp request object 304 and callback object 305, by described xmlhttp request object 304 the http request is sent to server end 302;
Described server end 302 is used for receiving and handles described http request, with the operating result of database 303 mutual backs to described xmlhttp request object 304 return data storehouses;
Described callback object 305 calls described operating result from described xmlhttp request object 304, and described operating result is sent to client 301, and upgrades client 301.
As further improvement of this embodiment, described client 301 also is used on described xmlhttp request object 304 call back function being set.
As further improvement of this embodiment, described server end 302 also is used for the operating result of database 303 is assembled into the xml form.
As further improvement of this embodiment, the operating result that described xmlhttp request object 304 also is used for will being assembled into according to described call back function the xml form is encapsulated as DOM Document Object Model DOM.
As further improvement of this embodiment, described xmlhttp request object 304 also is used for when the http request with client 301 distributions is sent to server end 302, calls described call back function notice client 301 and carries out other operations.
Please refer to shown in Figure 4ly again, the embodiment of the invention three provides a kind of data query system, comprising:
First creation apparatus 401 is used to create the xmlhttp request object;
Second creation apparatus 402 is used to create callback object;
Http send-request unit 403 is used for sending to server end by the http request that the xmlhttp request object of creating is distributed client;
Data interaction device 404 is used for reception and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Calling device 405 is used for calling described operating result by described callback object from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
As further improvement of this embodiment, described first creation apparatus 401 also is used on described xmlhttp request object call back function being set.
As further improvement of this embodiment, also comprise:
Apparatus for assembling is used for the operating result of database is assembled into the xml form, and is encapsulated as DOM Document Object Model DOM according to the operating result that described call back function will be assembled into the xml form.
As further improvement of this embodiment, when the http request that described http send-request unit 403 is distributed client was sent to server end, described xmlhttp request object called described call back function notice client and carries out other operations
The embodiment of the invention has been avoided the mutual of in enormous quantities simultaneously and database by introducing asynchronous communication mechanism, has reduced the expense of application system, reduces the operating pressure of server end, has also reduced access of database pressure simultaneously, has improved efficiency data query.And the user need not waiting for server end response, just can carry out other operations simultaneously, improved user experience.The embodiment of the invention has also made full use of the client resource that conventional art is ignored, and has improved treatment effeciency.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.

Claims (17)

1, a kind of data enquire method is characterized in that: may further comprise the steps:
Client is created xmlhttp request object and callback object;
Described xmlhttp request object asks asynchronous transmission to server end the http of client distribution;
Described server end receives and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Described callback object calls described operating result from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
2, method according to claim 1 is characterized in that: also comprise:
Client is provided with call back function on described xmlhttp request object.
3, method according to claim 2 is characterized in that: before the operating result in described server end return data storehouse, also comprise:
Described server end is assembled into plain text format with the operating result of database.
4, method according to claim 3 is characterized in that: described plain text format is extending mark language xml.
5, method according to claim 4 is characterized in that: described callback object calls before the described operating result from described xmlhttp request object, also comprises:
Described xmlhttp request object is encapsulated as DOM Document Object Model DOM according to the operating result that described call back function will be assembled into the xml form.
6, method according to claim 2 is characterized in that: when the http request that described xmlhttp request object is distributed client is sent to server end, calls described call back function notice client and carry out other operations.
7, method according to claim 1 is characterized in that: described renewal client specifically comprises:
Upgrade the client local page according to described operating result.
8, method according to claim 1 is characterized in that: when network service is broken down, and the described http request of buffer memory.
9, a kind of data query system comprises client, server end and database, it is characterized in that:
Described client is used to create xmlhttp request object and callback object, asks asynchronous transmission to server end http by described xmlhttp request object;
Described server end is used for receiving and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Described callback object calls described operating result from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
10, system according to claim 9 is characterized in that: described client also is used on described xmlhttp request object call back function being set.
11, system according to claim 10 is characterized in that: described server end also is used for the operating result of database is assembled into the xml form.
12, system according to claim 11 is characterized in that: the operating result that described xmlhttp request object also is used for will being assembled into according to described call back function the xml form is encapsulated as DOM Document Object Model DOM.
13, system according to claim 10 is characterized in that: described xmlhttp request object also is used for when the http request with the client distribution is sent to server end, calls described call back function notice client and carries out other operations.
14, a kind of data query system is characterized in that: comprising:
First creation apparatus is used to create the xmlhttp request object;
Second creation apparatus is used to create callback object;
The http send-request unit is used for giving server end by the xmlhttp request object of creating with the http request asynchronous transmission of client distribution;
Data interaction device is used for reception and handles described http request, with the operating result of the mutual back of database to described xmlhttp request object return data storehouse;
Calling device is used for calling described operating result by described callback object from described xmlhttp request object, and described operating result is sent to client, and upgrades client.
15, system according to claim 14 is characterized in that: described first creation apparatus also is used on described xmlhttp request object call back function being set.
16, system according to claim 15 is characterized in that: also comprise:
Apparatus for assembling is used for the operating result of database is assembled into the xml form, and is encapsulated as DOM Document Object Model DOM according to the operating result that described call back function will be assembled into the xml form.
17, system according to claim 15, it is characterized in that: when the http request that described http send-request unit is distributed client was sent to server end, described xmlhttp request object called described call back function notice client and carries out other operations.
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CN101976255A (en) * 2010-10-25 2011-02-16 中国农业大学 Method and device for large-quantity export of webpage information to generate WORD document
CN102098330A (en) * 2010-12-29 2011-06-15 东莞宇龙通信科技有限公司 Method, device and system for asynchronous transmission based on json data format
WO2011113265A1 (en) * 2010-03-18 2011-09-22 中兴通讯股份有限公司 Method, device and system for implementing data shared access
CN102279884A (en) * 2011-08-05 2011-12-14 中国工商银行股份有限公司 Data acquiring and displaying method, system and Web server based on Web pages
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CN102761617A (en) * 2012-07-02 2012-10-31 北京京北方信息技术有限公司 Workflow queue server and workflow scheduling system and method
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