CN104850627A - Method and apparatus for performing paging display - Google Patents
Method and apparatus for performing paging display Download PDFInfo
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- CN104850627A CN104850627A CN201510260580.2A CN201510260580A CN104850627A CN 104850627 A CN104850627 A CN 104850627A CN 201510260580 A CN201510260580 A CN 201510260580A CN 104850627 A CN104850627 A CN 104850627A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
Abstract
The present invention discloses a method and apparatus for performing paging display. The method comprises: assigning a preset value for the number of total pages; receiving an access request about paging data, wherein the access request comprises a current page number to be accessed; acquiring page data corresponding to the current page number; if the current page number is smaller than the number of total pages, judging whether the number of data bars of the obtained page data is equal to the number of displayed data bars on each page, if not, replacing the preset value with the current page number as the number of total pages; and displaying the obtained page data and displaying paging information, wherein the paging information comprises the number of total pages. With the technical solution according to the present invention, the paging display operation can be simplified, and the page turning performance can be improved.
Description
Technical field
The present invention relates to the information processing technology, particularly relate to the method and device of carrying out paging displaying.
Background technology
Along with the development of internet, the mankind enter the information age, and people hanker after information browse, net purchase etc.A lot of website can produce bulk information for one day and browse for user, and so large quantity of information inevitably all will relate to and information is showed user with the form of paging.
Carry out paging show time, except show user ask the page number corresponding page data except, also show paging information simultaneously, in described paging information, comprise total page number.Paging information example as shown in Figure 1, wherein, total page number is 100, and the page number of user's request is the 8th page, i.e. the current page number.
In traditional paging display technique, need to know that every page is shown how many data, namely show number for every page, also need to know the current page number, total page number, total how many data.Suppose that every page is shown that number is pageSize, the current page number is page, and ask the total number of corresponding all page datas to be totalItem with user, total page number is totalPage.Wherein, pageSize is the data pre-defined, given data; Page is the parameter that foreground is transmitted, and can be used as given data; TotalItem needs Query Database just can know, unknown data; TotalPage is the logic operation result of pageSize and totalItem, does is the formula calculating totalPage: totalPage=totalItem/pageSize+ (totalItem%pageSize>0? 1:0).In aforementioned formula, (totalItem%pageSize>0? 1:0) be three order computings, if represent that totalItem is greater than 0 with the value of pageSize delivery, so result is just 1, otherwise result is 0; Such as pageSize=10, totalItem=1000, then total page number totalPage=1000/10+ (1000%10>0? 1:0)=100.Visible, acquisition totalItem is the value in order to calculate totalPage, has had totalPage and page just can assemble paging information, as shown in Figure 1.And the data of specifically showing go according to pageSize and page the table data looked into.
Assemble paging information, need first to obtain totalItem, then calculate totalPage according to totalItem, then just can assemble component page information based on totalPage and page.
The total number totalItem obtaining data query in traditional paging display technique is very consuming time, because by using sql statement count (*) during data base querying total number; Further, the inquiry of a total number is all carried out during each inquiry paged data.Count (*) is operation that is very consuming time, consumption energy in sql, each page turning request will go to obtain total number, when big data quantity, large visit capacity, high concurrent, this operation causes inquiry slowly possibly, affects the database manipulation of other business.Such as some major holidays, so high visit capacity and concurrency reach more than 90% by directly causing database server cpu, data base querying slowly and linking number increase, finally cause database corruption, cause serious accident, traffic affecting is normally carried out.
In order to ensure that page access business is normally carried out under big data quantity, large visit capacity, high complications, the problem of inquiring about total number totalItem more consuming time must be resolved.General all by following solution at present:
1, buffer memory total number totalItem.
When user inquires about paged data time, network side can inquire about total number totalItem, is at this moment cached by totalItem, and arranges expired time.First later all users can go to look in buffer memory whether have totalItem when visiting again paged data, if had with regard to the totalItem in direct return cache, Query Database need not be gone again to obtain totalItem; If buffer memory is not just looked into database and is obtained totalItem, then is put in buffer memory.Adopt the mode of totalItem of obtaining from buffer memory, avoid and use count (*) to go to inquire about total number frequently, not only make efficiency be improved, and make database be in comparatively safe in.
2, global search technology is used.
Full-text search is a kind of written historical materials search method of being mated with search terms by texts all in file.The full-text search third party technology that current java relatively commonly uses is Lucene, Solr etc.
The principle of full-text search be lane database is often used inquiry information extraction to hard disk as index file; then the service provision program developing inquiry uses; like this; when paging request based on user needs to inquire about totalItem; by direct search index file; and not direct Query Database, serve the effect in protected data storehouse.
There is following defect in existing inquiry total number totalItem scheme:
1, the shortcoming of buffer memory total number totalItem:
(1), when the totalItem in buffer memory is expired will go to look into database, if at this moment when concurrent very large just have a lot of requests directly to go to look into database simultaneously, the pressure of short time can be caused to database.
(2), the promptness of data declines, and when there being new data in database, the totalItem value of depositing in the buffer can not change.
100 data (totalItem=100) are had in such as database, show 10 data (pageSize=10) for every page, so draw totalPage=totalItem/pageSize+ (totalItem%pageSize>0 according to the formula calculating totalPage? 1:0)=100/10+ (100%10>0? 1:0)=10.If at this moment data totalItem has increased 110,11 pages should have been had so in theory, but due to buffer memory not out of date, the totalPage in buffer memory or 10,10 newly-increased data would not accessed by the userly arrive, thus produce the problem of promptness difference.If just initiatively the totalPage disposed in buffer memory is the problem that can solve data promptness when data increase, but a lot of situation data are all ever-increasing, the totalPage removed in buffer memory also just loses the effect of buffer memory frequently, also can cause inquiry slowly, bring pressure to database.
2, the shortcoming of global search technology is used:
(1), full-text search formula a special kind of skill, developer early stage study and the maintenance cost in later stage higher.
(2), when updating file data can operate hard disk frequently, the loss of hard disk can be caused, time especially renewal amount is larger; Because the increment index major part that updating file uses all is realized by merge algorithm, and this merge algorithm will cause hard disk operation frequently; The renewal (update) of a new data, the index of the basic no change of a part may be caused to be rewritten many times, and the data of frequent update also consume server resource very much, cause the decline of query performance.
(3), a large amount of request access, frequently will read index file, the risk that file handle damages may be caused, carry out the normal use having influence on function.
(4), generally use incremental update when upgrading index, upgrade to ensure also to use with the consistance of database data full dose, when full dose upgrades, operating efficiency can reduce.
To sum up, in existing scheme, the acquisition of total number totalItem is all very complicated, quite consuming time and efficiency is low, and then greatly have impact on speed and performance that paging shows.
Summary of the invention
The invention provides a kind of method of carrying out paging displaying, the method can simplify paging and show operation, improves page turning.
The invention provides a kind of device carrying out paging displaying, this device can simplify paging and show operation, improves page turning.
Carry out a method for paging displaying, for total page number distributes a preset value, the method comprises:
Receive the request of access about paged data, described request of access comprises the current page number to be visited;
Obtain the page data that the current page number is corresponding;
If the current page number is less than total page number, then judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number;
Show the page data obtained, show paging information simultaneously, in described paging information, comprise total page number.
Carry out a device for paging displaying, this device comprises preset value distribution module, request of access acquisition module, page data acquisition module, judge module and display module;
Described preset value distribution module, for total page number distributes a preset value;
Described request of access acquisition module, receives the request of access about paged data, and described request of access comprises the current page number to be visited; The current page number is sent to described page data acquisition module, described judge module and described display module respectively;
Described page data acquisition module, obtains the page data that the current page number is corresponding, sends to described display module;
Described judge module, receives the current page number from described request of access acquisition module, if know, the current page number is less than total page number, then judge whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number; Total page number is sent to described display module;
Described display module, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
As can be seen from such scheme, in the present invention, in advance for total page number distributes a preset value, when carrying out point access to web page, receive the request of access about paged data, described request of access comprises the current page number to be visited; Obtain the page data that the current page number is corresponding; If the current page number is less than total page number, then judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number.Adopt the present invention program, change the inertia implementation being calculated total page number in prior art by the mode obtaining total number totalItem, but distribute a preset value for total page number, afterwards, just whether can equal every page based on the data number of page data and show that number determines total page number; Like this, without the need to obtaining total number totalItem, enormously simplify paging and showing operation, improve speed and the performance of page turning.
Accompanying drawing explanation
Fig. 1 is the paging information schematic diagram shown in prior art;
Fig. 2 is the method indicative flowchart that the present invention carries out paging displaying;
Fig. 3 is the method flow diagram example one that the present invention carries out paging displaying;
Fig. 4 is the method flow diagram example two that the present invention carries out paging displaying;
Fig. 5 is the paging information schematic diagram shown in the present invention;
Fig. 6 is the apparatus structure schematic diagram that the present invention carries out paging displaying.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Existingly carry out in the scheme of paging displaying, need first to obtain total number totalItem, then calculate total page number totalPage according to totalItem; And the acquisition of total number totalItem is all very complicated, quite consuming time and efficiency is low, and then greatly have impact on the speed and performance that paging shows.In order to solve this technical problem, the present invention changes the inertia implementation being calculated total page number in prior art by the mode obtaining total number totalItem, but distribute a preset value for total page number, afterwards, more whether equal every page based on the data number of page data and show that number determines total page number; Like this, without the need to obtaining total number totalItem, enormously simplify paging and showing operation, improve speed and the performance of page turning.
See Fig. 2, for the present invention carries out the method indicative flowchart of paging displaying, the method is that total page number distributes a preset value, and preset value can be arranged as required voluntarily.
The flow process of Fig. 2 comprises the following steps:
Step 201, receives the request of access about paged data, and described request of access comprises the current page number to be visited.
When user needs to carry out point access to web page, to network side initiation request of access.
Step 202, obtains the page data that the current page number is corresponding.
After knowing the current page number, just can obtain corresponding page data.
Step 203, if the current page number is less than total page number, then judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replaces preset value, as total page number with the current page number.
The total number of corresponding all page datas is asked to be totalItem with user, under many circumstances, if total number totalItem is not too large, and the preset value distributed for total page number is greater than total number totalItem, then the current page number that user asks all will be less than total page number.
And known further by practical experience, the data number of page data is every page to the maximum and shows number; In this step, if the data number of page data is not equal to every page show number, then determine that the current page number is last page, and then replace preset value, as final total page number with the current page number.
Step 204, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
In the present invention, in advance for total page number distributes a preset value, when carrying out point access to web page, receive the request of access about paged data, described request of access comprises the current page number to be visited; Obtain the page data that the current page number is corresponding; If the current page number is less than total page number, then judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number.Adopt the present invention program, change the inertia implementation being calculated total page number in prior art by the mode obtaining total number totalItem, but distribute a preset value for total page number, afterwards, just whether can equal every page based on the data number of page data and show that number determines total page number; Like this, without the need to obtaining total number totalItem, enormously simplify paging and showing operation, improve speed and the performance of page turning.
What give in Fig. 1 flow process that real total page number is less than preset value realizes situation; For other feature situations, real total page number may be equal to or greater than preset value, in order to solve these situations further, The present invention gives further perfect scheme:
After obtaining page data corresponding to the current page number, if know, the current page number equals total page number, then judge whether the data number of the page data obtained equals every page and show number, if so, then increases preset value, with the preset value after increase as total page number; Otherwise, using the current page number as final total page number;
Show the page data obtained, show paging information simultaneously, in described paging information, comprise total page number.
Above-mentioned increase preset value can adopt various ways to realize.Such as, preset value is added certain quantity, as 50, as new total page number.For another example: preset value is multiplied by multiple value, using the product that obtains as final total page number.Multiple value can be arranged as required, such as, be 2.
Below by Fig. 3,4 flow process, the method for the present invention being carried out to paging displaying is illustrated, in this example, in advance for total page number distributes a preset value.
The present invention improves on prior art basis, according to the conclusion analyzed before---and obtaining totalItem just in order to calculate totalPage, if totalPage is known, so just not spending inquiry totalItem; So the present invention program is---be totalPage assign a value X in advance, this value at will can adjust according to data cases, just obtains totalItem without the need to Query Database and calculate totalPage when the data of such user in this X page of inquiry; If in inquiry X page when data, the display data returned is less than pageSize, and that proves that the current page number has been maximum number of pages, now the value of totalPage is set to the current page number.
See Fig. 3, for the present invention carries out the method flow diagram example one of paging displaying, this example is less than the situation of total page number for the current page number; In figure, page: the current page number, totalPage: total page number, pageSize: every page shows number.
The flow process of Fig. 3 comprises the following steps:
Step 301, network side receives the request of access from user side, and described request of access comprises the current page number to be visited.
Step 302, shows number and the current page number according to every page, inquires the page data that the current page number is corresponding from database.
Step 303, judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replaces preset value, as total page number with the current page number; Otherwise, total page number is not changed.
Step 304, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
When inquiry X page, time namely X equals totalPage, if the display data returned equals pageSize, so in order to ensure that data below can be queried to, at this moment totalPage is multiplied by 2.See Fig. 4, for the present invention carries out the method flow diagram example two of paging displaying, this example equals the situation of total page number for the current page number, and it comprises the following steps:
Step 401, receives the request of access about paged data, and described request of access comprises the current page number to be visited.
Step 402, shows number and the current page number according to every page, inquires the page data that the current page number is corresponding from database.
Step 403, judges whether the data number of page data obtained equals every page and show number, if so, then preset value is multiplied by 2, using the product that obtains as final total page number; Otherwise, using the current page number as final total page number.
Step 404, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
In this example, the preset value of total page number is 100, after carrying out total page number replacement, is 200, paging information schematic diagram as shown in Figure 5.
If user is page turning backward, so will continue the flow process repeating Fig. 3, Fig. 4, the method all can not remove the totalItem in Query Database in the whole page turn over operation of user, and page turning is greatly enhanced.
See Fig. 6, carry out the structural representation of the device of paging displaying for the present invention, this device comprises preset value distribution module, request of access acquisition module, page data acquisition module, judge module and display module;
Described preset value distribution module, for total page number distributes a preset value;
Described request of access acquisition module, receives the request of access about paged data, and described request of access comprises the current page number to be visited; The current page number is sent to described page data acquisition module, described judge module and described display module respectively;
Described page data acquisition module, obtains the page data that the current page number is corresponding, sends to described display module;
Described judge module, receives the current page number from request of access acquisition module, if know, the current page number is less than total page number, then judge whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number; Total page number is sent to described display module;
Described display module, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
Preferably, described judge module, if know, the current page number equals total page number, then judge whether the data number of the page data obtained equals every page and show number, if so, then increases preset value, with the preset value after increase as total page number; Otherwise, using the current page number as final total page number; Total page number is sent to described display module.
Preferably, described judge module, when increasing preset value, is multiplied by multiple value by preset value, using the product that obtains as final total page number.
Preferably, described judge module, when judging that the data number of the page data obtained equals every page of displaying number, does not change total page number.
Preferably, described page data acquisition module, shows number and the current page number according to every page, inquires the page data that the current page number is corresponding from database.
In the present invention program, by pre-setting the value of totalPage, and the value of totalPage changes according to the change of the data number of the current page number and current page data, and up-to-date data can be shown in front of the user.The present invention program is applicable to the application scenarios of various page turning, whole process does not spend the action carrying out inquiring about totalItem, avoid count (*) statement using search efficiency to turn down in queries, it uses simple, and page turning is greatly improved, and application is allowed to become healthy and strong, stable.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. carry out a method for paging displaying, it is characterized in that, for total page number distributes a preset value, the method comprises:
Receive the request of access about paged data, described request of access comprises the current page number to be visited;
Obtain the page data that the current page number is corresponding;
If the current page number is less than total page number, then judges whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number;
Show the page data obtained, show paging information simultaneously, in described paging information, comprise total page number.
2. the method for claim 1, is characterized in that, the method also comprises:
If the current page number equals total page number, then judge whether the data number of the page data obtained equals every page and show number, if so, then increases preset value, with the preset value after increase as total page number; Otherwise, using the current page number as final total page number;
Show the page data obtained, show paging information simultaneously, in described paging information, comprise total page number.
3. method as claimed in claim 2, it is characterized in that, described increase preset value comprises:
Preset value is multiplied by multiple value, using the product that obtains as final total page number.
4. the method for claim 1, is characterized in that, if judge that the data number of the page data obtained equals every page and shows number, the method also comprises: do not change total page number.
5. the method according to any one of Claims 1-4, is characterized in that, the page data that the current page number of described acquisition is corresponding comprises: show number and the current page number according to every page, inquire the page data that the current page number is corresponding from database.
6. carry out a device for paging displaying, it is characterized in that, this device comprises preset value distribution module, request of access acquisition module, page data acquisition module, judge module and display module;
Described preset value distribution module, for total page number distributes a preset value;
Described request of access acquisition module, receives the request of access about paged data, and described request of access comprises the current page number to be visited; The current page number is sent to described page data acquisition module, described judge module and described display module respectively;
Described page data acquisition module, obtains the page data that the current page number is corresponding, sends to described display module;
Described judge module, receives the current page number from described request of access acquisition module, if know, the current page number is less than total page number, then judge whether the data number of the page data obtained equals every page and show number, if be not equal to, then replace preset value, as total page number with the current page number; Total page number is sent to described display module;
Described display module, shows the page data obtained, shows paging information simultaneously, comprise total page number in described paging information.
7. device as claimed in claim 6, is characterized in that, described judge module, if know, the current page number equals total page number, then judge whether the data number of the page data obtained equals every page and show number, if, then increase preset value, with the preset value after increase as total page number; Otherwise, using the current page number as final total page number; Total page number is sent to described display module.
8. device as claimed in claim 7, is characterized in that, described judge module, when increasing preset value, preset value is multiplied by multiple value, using the product that obtains as final total page number.
9. device as claimed in claim 6, is characterized in that, described judge module, when judging that the data number of the page data obtained equals every page of displaying number, does not change total page number.
10. the device according to any one of claim 6 to 9, is characterized in that, described page data acquisition module, shows number and the current page number, inquire the page data that the current page number is corresponding from database according to every page.
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