CN103870583B - Relational-database-based online and controllable browsing method for PDF document - Google Patents
Relational-database-based online and controllable browsing method for PDF document Download PDFInfo
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- CN103870583B CN103870583B CN201410115331.XA CN201410115331A CN103870583B CN 103870583 B CN103870583 B CN 103870583B CN 201410115331 A CN201410115331 A CN 201410115331A CN 103870583 B CN103870583 B CN 103870583B
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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
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/28—Databases characterised by their database models, e.g. relational or object models
- G06F16/284—Relational databases
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/0483—Interaction with page-structured environments, e.g. book metaphor
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- General Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Data Mining & Analysis (AREA)
- Storage Device Security (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The invention discloses a relational-database-based online and controllable browsing method for a PDF document, and relates to the technical field of networks. According to the method, the PDF document is converted into a binary system and encrypted by utilizing a server, the PDF document after being converted and encrypted is stored into a relational database, the information of the PDF document is displayed in a paged mode on line by reading the bookmark information of the PDF document itself, and the functions of controlling the display page number sequence, page scaling, page rotation, page skip and the like of a PDF converted image on line are achieved. In this way, a user can browse the PDF document on line without installing software of the Adobe Company, and the display effect of the PDF document can be controlled on line.
Description
Technical field
The present invention relates to networking technology area, and in particular to a kind of online controllable method for browsing PDF document.
Background technology
PDF documents are, based on PostScript language image models, can all to ensure essence on which kind of printer
True color and accurate printing effect, i.e. PDF can verily reproduce each character, color and the image of original copy.In day
In often study office, user needs to browse to check PDF document:If not taking unified storage, the mode of online browse produce
Following problem:
1. firstly, for user for, to such as check PDF document, can typically use the PDF scan tools of Adobe companies
Software, or third party's PDF scan tools of other company's exploitations, so PDF just can be by these instruments by user
Preserve, but for PDF suppliers:Some PDF do not allow to download, can only online browse.
2. subscriber network terminal equipment installs PDF scan tools, and same portion PDF document will be stored in each net
In network terminal unit, memory space is wasted, and cost is greatly improved.When some network-termination devices occur computer virus or
Failure, such as runs into important PDF document and cannot recover, derive, and the consequence for causing is very serious.
3. as the instrument for generating PDF document is numerous, check that the tool software of PDF document is also more, prior art cannot be protected
Demonstrate,prove these PDF scan tools can the PDF document that generated by different instruments of 100% compatibility, easily occur holding when checking these documents
Sex chromosome mosaicism, so causes user check all kinds of PDF documents in time, affects work efficiency.
4. in prior art, if not changing PDF document coding form but being directly changed into picture format and be stored in text
In shelves server or data base, then these documents for being converted into picture just certainly exist the probability divulged a secret.
In sum, PDF document convert documents are encoded and encrypting storing is in relevant database, there is provided online browse
PDF document can then solve the above-mentioned series of problems enumerated.
The content of the invention
The technical problem to be solved is:For above-mentioned problem, there is provided a kind of to be based on relational data
The online controllable method for browsing PDF document in storehouse.
The technical solution used in the present invention is as follows:Including the step of preparation process, upload and storage PDF document and online
The step of browsing PDF document;When user's request online browse PDF document, perform online browse PDF document the step of;
The preparation process includes:Communication connection, the server energy are set up between network-termination device and server
Enough one-one relationship type data bases are written and read operation;
The step of upload and storage PDF document, includes:
Step A1:The PDF document that the needs of network-termination device receiving user's input are uploaded, the PDF document is uploaded
To the server;
Step A2:The server extracts the essential information of the PDF document and the PDF document is encrypted;
Step A3:The server is stored in the PDF document and its essential information after encryption as a PDF document data
Relevant database, and an identification field is given to the PDF document data;
The step of online browse PDF document, includes:
Step B1:Every PDF document data in the server traversal relevant database, by all PDF document numbers
According to making list, then the list is converted to into HTML code it is transferred to the network-termination device;
Step B2:The network-termination device displays to the user that the list;
Step B3:When user click on network-termination device on list in certain PDF document data after, the network terminal sets
It is standby that the identification field of the PDF document data is sent to into server;
Step B4:Server reads corresponding encryption from the relevant database according to the identification field for receiving
PDF document and its essential information;
Step B5:Server is decrypted to the encryption PDF document, obtains original PDF document;
Step B6:The page number that the needs of network-termination device receiving user's input are browsed simultaneously is transferred to server;
Step B7:The corresponding PDF conversion of page of the page number for needing to browse is sent to institute by the server for picture
Network-termination device is stated, and using the page number for needing to browse as the page number storage for currently browsing;
Step B8:The network-termination device shows the picture.
Further, in step B6, it is described need the page number that browses be homepage or last page or page number ordinal number or " on
One page " or " lower one page ";
When the page number for needing to browse is homepage or last page or page number ordinal number, in step B7:The server is by head
Page or last page or the corresponding PDF conversion of page of page number ordinal number are sent to the network-termination device for picture;
When the page number for needing to browse is " page up " or " lower one page ", in step B7:The server is according to institute
State the page number for currently browsing and find its page up or the corresponding page of lower one page, then by the page up or the corresponding page of lower one page
Face is converted to picture and sends to the network-termination device.
Further, step B3 also includes:The dimensional parameters of its screen are sent to server by network-termination device;
In step B6, the browsing instructions of network-termination device also receiving user's input are simultaneously transferred to server.
Further, in step B6, the browsing instructions are that page scaling is instructed or page rotation instruction;
When browsing instructions are that page scaling is instructed, step B7 also includes:Server is according to putting in the instruction of page scaling
The corresponding page of the page number for needing to browse is converted into the screen size of contracting ratio and network-termination device the figure of corresponding size
Piece is sent to the network-termination device;
When browsing instructions are that page rotation is instructed, step B7 also includes:Server is according to the rotation in page rotation instruction
Gyration will be converted into picture after needing the corresponding page rotation respective angles of the page number that browse and send to the network terminal and set
It is standby, or server will first need the corresponding page of the page number that browses to be converted into picture, further according to the rotation in page rotation instruction
Gyration will be sent to the network-termination device after the picture rotation respective angles.
Further, step B7 also includes:Whether whois lookup itself has preserved the page number pair for browsing in need first
The picture answered, if any then needing the page number that browses as the page number storage for currently browsing using described, then direct execution step
B8。
Further, step B8 also includes:The keyboard for shielding the network-termination device clicks on event and mouse click event.
Present invention also offers the online controllable method that browse PDF document of the another kind based on relevant database, including
The step of the step of preparation process, upload and storage PDF document and online browse PDF document;When user's request online browse
During PDF document, perform online browse PDF document the step of;
Preparation process in this programme is identical with aforementioned schemes with the step of upload and store PDF document.
The step of online browse PDF document, includes:
Step C1:Every PDF document data in the server traversal relevant database, by all PDF document numbers
According to making list, then the list is converted to into HTML code it is transferred to the network-termination device;
Step C2:The network-termination device displays to the user that the list;
Step C3:When user click on network-termination device on list in certain PDF document data after, the network terminal sets
It is standby that the identification field of the PDF document data is sent to into server;
Step C4:Server reads corresponding encryption from the relevant database according to the identification field for receiving
PDF document and its essential information;
Step C5:Server is decrypted to the encryption PDF document, obtains original PDF document;
Step C6:Server reads the bookmark of the PDF document, if the PDF document does not have bookmark, for the PDF
One integer index of document structure tree is used as bookmark;
Step C7:Per page in the bookmark corresponding PDF page is converted into into picture, and each picture is stored in into server
On;
Step C8:By it is store path of the bookmark with described each picture on the server corresponding combine generation it is tree-shaped
The tree-shaped bookmark is converted to HTML code and returns to network-termination device by bookmark;
Step C9:Network-termination device shows the bookmark information in the tree-shaped bookmark, when user clicks on the bookmark letter
During certain one page in breath, network-termination device reads the page according to this page of corresponding store path recorded in the tree-shaped bookmark
Corresponding picture, and it is shown to user.
Further, step C4 also includes:According to the identification field for receiving, server searches whether which preserves first
The picture and tree-shaped bookmark of the corresponding PDF document of the identification field, if any the tree-shaped bookmark is converted to HTML generations directly then
Code returns to network-termination device;Then step C5 ~ C8, direct execution step C9 are skipped.
Further, step C9 also includes:The keyboard for shielding the network-termination device clicks on event and mouse click event.
Further, after user terminates online browse PDF, the server deletes the step of the online browse PDF document
The rapid whole pictures for generating.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows:
Present invention achieves the function of online browse PDF, user can also browse PDF in the case of no PDF readers
Document, the technical problem mentioned in efficiently solving background technology.
In addition, the present invention can also prevent user by keyboard or mouse in user browses PDF document come in PDF document
Content carry out sectional drawing, further ensure the safety of PDF document.
The present invention also support is controllable online to be browsed, and user can carry out scaling or rotation to the page for browsing.
The invention enables user is saved memory space, is reduced into without browsing PDF document locally downloading
This.The present invention PDF document is stored in relevant database, even if when some network-termination devices occur computer virus or
Failure, important PDF document will not therefore suffer from damaging.
To sum up, the present invention substantially reduces management, browses PDF document cost with easy to use, and improves PDF document guarantor
The advantages of close property.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is flow chart of the present invention.
Specific embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, can be equivalent or with similar purpose by other
Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics
.
The step of first embodiment of the invention includes preparation process, uploads and stores PDF document and online browse PDF are literary
The step of shelves;When user's request online browse PDF document, perform online browse PDF document the step of.
The preparation process includes:Communication connection, the server energy are set up between network-termination device and server
Enough one-one relationship type data bases are written and read operation.The relevant database can be realized with another server, Huo Zheguan
It is that type data base is just arranged on book server.
The step of upload and storage PDF document, includes:
Step A1:The PDF document that the needs of network-termination device receiving user's input are uploaded, the PDF document is uploaded
To the server.
Step A2:The server extracts the essential information of the PDF document and the PDF document is encrypted;Here institute
The essential information stated includes PDF document size, document title, document page number etc..Concrete ciphering process can be, but not limited to this
Sample:Now by PDF document Content Transformation be binary form, traversal encryption is being carried out to the binary documents.
Step A3:The server is stored in the PDF document and its essential information after encryption as a PDF document data
Relevant database, and an identification field is given to the PDF document data;Identification field for every PDF document data is
Uniquely, its form can be the numerical value, or a character string of int forms, and it is the same which acts as identity, is
It is easy to recognize and search PDF document data.
The step of online browse PDF document, includes:
Step B1:Every PDF document data in the server traversal relevant database, by all PDF document numbers
According to making list, then the list is converted to into HTML code it is transferred to the network-termination device.
Step B2:The network-termination device displays to the user that the list.
Step B3:When user click on network-termination device on list in certain PDF document data after, the network terminal sets
It is standby that the identification field of the PDF document data is sent to into server.
Step B4:Server reads corresponding encryption from the relevant database according to the identification field for receiving
PDF document and its essential information.
Step B5:Server is decrypted to the encryption PDF document and obtains binary file, then binary file is turned
Turn to original PDF document.
Step B6:The page number that the needs of network-termination device receiving user's input are browsed simultaneously is transferred to server.
Step B7:The corresponding PDF conversion of page of the page number for needing to browse is sent to institute by the server for picture
Network-termination device is stated, and using the page number for needing to browse as the page number storage for currently browsing.Picture described here
Form can be JPG or TIF forms etc..
Step B8:The network-termination device shows the picture.
In other embodiments, in step B6, the page number for needing to browse is homepage or last page or page number sequence
Number or " page up " or " lower one page ".
When the page number for needing to browse is homepage or last page or page number ordinal number, in step B7:The server is by head
Page or last page or the corresponding PDF conversion of page of page number ordinal number are sent to the network-termination device for picture.
When the page number for needing to browse is " page up " or " lower one page ", in step B7:The server is according to institute
State the page number for currently browsing and find its page up or the corresponding page of lower one page, then by the page up or the corresponding page of lower one page
Face is converted to picture and sends to the network-termination device.
In another embodiment, user can also control the size and Orientation for browsing the PDF document page, and specific way is
Increase in step B3:The dimensional parameters of its screen are sent to server by network-termination device;Screen described here
Size includes the information such as the length and width of screen.
In step B6, the browsing instructions of network-termination device also receiving user's input are simultaneously transferred to server.
The browsing instructions are that page scaling is instructed or page rotation instruction;
When browsing instructions are that page scaling is instructed, step B7 also includes:Server is according to putting in the instruction of page scaling
The corresponding page of the page number for needing to browse is converted into the screen size of contracting ratio and network-termination device the figure of corresponding size
Piece is sent to the network-termination device.
When browsing instructions are that page rotation is instructed, step B7 also includes:Server is according to the rotation in page rotation instruction
Gyration will be converted into picture after needing the corresponding page rotation respective angles of the page number that browse and send to the network terminal and set
It is standby, or server will first need the corresponding page of the page number that browses to be converted into picture, further according to the rotation in page rotation instruction
Gyration will be sent to the network-termination device after the picture rotation respective angles.
In order to accelerate response speed, step B7 also includes:Whether whois lookup itself has preserved in need clear first
The corresponding picture of the page number look at, if any then needing the page number that browses as the page number storage for currently browsing using described, then directly
Execution step B8.If not needing the corresponding picture of the page number for browsing, server first obtain the front figure of PDF document
Piece, and pass to network-termination device and temporarily access for user and check, allow user to feel that the waiting time is not oversize, when obtaining user
After specifying the corresponding picture of the PDF document page number to be browsed, the picture is issued network-termination device and is shown by server immediately.
Second embodiment of the invention provides another kind of online controllable side for browsing PDF document based on relevant database
Method, including preparation process, the step of upload and store PDF document and the step of online browse PDF document;When user's request exists
When line browses PDF document, perform online browse PDF document the step of;
Preparation process in the present embodiment is identical with aforementioned schemes with the step of upload and store PDF document.
The step of online browse PDF document, is different from first embodiment, and which includes:
Step C1:Every PDF document data in the server traversal relevant database, by all PDF document numbers
According to making list, then the list is converted to into HTML code it is transferred to the network-termination device.
Step C2:The network-termination device displays to the user that the list.
Step C3:When user click on network-termination device on list in certain PDF document data after, the network terminal sets
It is standby that the identification field of the PDF document data is sent to into server.
Step C4:Server reads corresponding encryption from the relevant database according to the identification field for receiving
PDF document and its essential information.
Step C5:Server is decrypted to the encryption PDF document, obtains original PDF document.
Step C6:Server reads the bookmark of the PDF document, and the bookmark of PDF document has reacted the merogenesis of document content
Information, and the relation of these merogenesis and the PDF document page number.For the PDF document for not having bookmark, then it is whole document structure tree one
Individual integer index, such as 1 represents PDF page 1, and 2 represent page 2, and so on n represent nth page, until for PDF document most
The next page also sets an integer.
Step C7:Each page number in the bookmark corresponding PDF pages are converted into into picture, and by the service of being stored in of each picture
On device.
Step C8:Combine store path of each page number of bookmark with described each picture on the server corresponding
Spanning tree shaped bookmark, tree-shaped bookmark have reacted the corresponding picture of aforementioned bookmark each page number store path on the server, by institute
State tree-shaped bookmark and be converted to HTML code and return to network-termination device.
Step C9:Network-termination device shows the bookmark information in the tree-shaped bookmark, when user clicks on the bookmark letter
During certain one page in breath, network-termination device reads the page according to this page of corresponding store path recorded in the tree-shaped bookmark
Corresponding picture, and it is shown to user.In other embodiments, tree-shaped bookmark can be shown to user after escape, so
Doing to make user can't see picture store path on the server.
It is same in order to accelerate response speed, in other embodiments, step C4 also includes:Server is according to reception first
To identification field search its picture and tree-shaped bookmark for whether having preserved the corresponding PDF document of the identification field, if any then
Directly the tree-shaped bookmark is converted to HTML code returns to network-termination device;Then step C5 ~ C8 is skipped, is directly performed
Step C9.
In order to prevent user from browsing pictures are carried out with sectional drawing, the step in above-mentioned each embodiment by operating mouse or keyboard
Rapid C9 also includes:The keyboard that the network-termination device is shielded by the JavaScript program of IE browser clicks on event and Mus
Punctuate hits event.After user terminates online browse PDF, give birth to the step of the server deletes the online browse PDF document
Into whole pictures.So on the one hand desirably prevent the PDF document on server to be replicated, on the other hand can also save clothes
Business device memory space.
The display interface of network-termination device may be designed so that:The left side of the page for the document bookmark information,
The respective document page that the right side of the page is shown by clicking on the bookmark in left side for user.In video data storehouse above the page
The PDF document Back ground Information of storage, and page turning and pivot controls.
The invention is not limited in aforesaid specific embodiment.The present invention is expanded to and any is disclosed in this manual
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (4)
1. a kind of online controllable method for browsing PDF document based on relevant database, it is characterised in that including preparing step
Suddenly the step of the step of, uploading and store PDF document and online browse PDF document;When user's request online browse PDF document
When, perform online browse PDF document the step of;
The preparation process includes:Communication connection is set up between network-termination device and server, the server can be right
One relevant database is written and read operation;
The step of upload and storage PDF document, includes:
Step A1:The PDF document is uploaded to institute by the PDF document that the needs of network-termination device receiving user's input are uploaded
State server;
Step A2:The server extracts the essential information of the PDF document and the PDF document is encrypted;
Step A3:The PDF document and its essential information after encryption is stored in relation by the server
Type data base, and an identification field is given to the PDF document data;
The step of online browse PDF document, includes:
Step C1:Every PDF document data in the server traversal relevant database, all PDF document data are done
Into list, then the list is converted to into HTML code it is transferred to the network-termination device;
Step C2:The network-termination device displays to the user that the list;
Step C3:When user click on network-termination device on list in certain PDF document data after, network-termination device will
The identification field of the PDF document data is sent to server;
Step C4:It is literary that server reads corresponding encryption PDF from the relevant database according to the identification field for receiving
Shelves and its essential information;
Step C5:Server is decrypted to the encryption PDF document, obtains original PDF document;
Step C6:Server reads the bookmark of the PDF document, if the PDF document does not have bookmark, for the PDF document
An integer index is generated as bookmark;
Step C7:Per page in the bookmark corresponding PDF page is converted into into picture, and each picture is stored on the server;
Step C8:Spanning tree pleading is combined by store path of the bookmark with described each picture on the server corresponding
Sign, the tree-shaped bookmark is converted to into HTML code and returns to network-termination device;
Step C9:Network-termination device shows the bookmark information in the tree-shaped bookmark, when user is clicked in the bookmark information
Certain one page when, network-termination device according to this page of corresponding store path recorded in the tree-shaped bookmark read this page it is corresponding
Picture, and be shown to user.
2. a kind of online controllable method for browsing PDF document based on relevant database according to claim 1, which is special
Levy and be, step C4 also includes:Whether server searches its identification field pair according to the identification field for receiving first
The picture of the PDF document answered and tree-shaped bookmark, return to network if any the tree-shaped bookmark is converted to HTML code directly then
Terminal unit;Then step C5 ~ C8, direct execution step C9 are skipped.
3. a kind of online controllable method for browsing PDF document based on relevant database according to claim 1 and 2,
Characterized in that, step C9 also includes:The keyboard for shielding the network-termination device clicks on event and mouse click event.
4. a kind of online controllable method for browsing PDF document based on relevant database according to claim 1, which is special
Levy and be, after user terminates online browse PDF, generate the step of the server deletes the online browse PDF document
Whole pictures.
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CN104408380A (en) * | 2014-10-16 | 2015-03-11 | 江苏博智软件科技有限公司 | A method for a mass data secure storage technology |
CN104935666B (en) * | 2015-06-24 | 2019-01-01 | 智秦数字出版(西安)有限公司 | A kind of method and system for mobile terminal viewing pdf document |
CN105740657A (en) * | 2016-01-26 | 2016-07-06 | 唐山新质点科技有限公司 | On-line browsing method and device of file |
CN108133416A (en) * | 2018-03-13 | 2018-06-08 | 南京审计大学 | Audit negotiating system |
CN110765072A (en) * | 2018-07-27 | 2020-02-07 | 珠海金山办公软件有限公司 | Method and device for saving file |
CN110795006A (en) * | 2018-08-03 | 2020-02-14 | 珠海金山办公软件有限公司 | Document processing method and device, computer storage medium and terminal |
CN109446490B (en) * | 2018-09-13 | 2023-07-21 | 杭州索骥数据科技有限公司 | Previewing method, generating method and processing method of PDF (portable document format) file |
CN109495455A (en) * | 2018-10-26 | 2019-03-19 | 吴晓军 | A kind of data processing system, method and apparatus |
CN112394857B (en) * | 2019-08-19 | 2023-10-31 | 珠海金山办公软件有限公司 | Method and device for converting format of slide PPT document and electronic equipment |
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