CN106484467A - Method for loading dynamic library in jar package by java - Google Patents
Method for loading dynamic library in jar package by java Download PDFInfo
- Publication number
- CN106484467A CN106484467A CN201610840741.XA CN201610840741A CN106484467A CN 106484467 A CN106484467 A CN 106484467A CN 201610840741 A CN201610840741 A CN 201610840741A CN 106484467 A CN106484467 A CN 106484467A
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- CN
- China
- Prior art keywords
- dynamic base
- file
- java
- jar bag
- loads
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012217 deletion Methods 0.000 claims description 6
- 230000037430 deletion Effects 0.000 claims description 6
- 230000032696 parturition Effects 0.000 claims 1
- 230000006870 function Effects 0.000 description 11
- 230000006837 decompression Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Stored Programmes (AREA)
- Devices For Executing Special Programs (AREA)
Abstract
The invention discloses a method for loading a dynamic library in a jar packet by java, which comprises the following implementation processes: and decompressing the dynamic library in the jar package to a temporary file directory, loading through an absolute path, and deleting the generated dynamic library at the end of the program. Compared with the prior art, the method for loading the dynamic library in the jar package by the java can provide the specified position in the jar package or in the jar package for loading, meets the requirement of loading the dynamic library, ensures the cleanness of the system, and has strong practicability, wide application range and easy popularization.
Description
Technical field
The present invention relates to technical field of software development, specifically a kind of practical, java loads jar bag the inside and moves
The method in state storehouse.
Background technology
Dynamic load jar bag, often may require that in actual development and uses, more particularly, to the relation of platform and business when
Wait, service logic part can independently go out to give business square tube reason, and business side only needs to provide jar bag, just can be on platform
Run.
Do not provide the dynamic base method loading in jar bag in the prior art method, but java program carries to outside
It is all to be existed with jar packet mode for program, there is presently no a kind of method can refer to by jar bag inside or jar bag
Fixed position is gone to load jar bag the inside dynamic base, has had a strong impact on the carrying out of software development, in consideration of it, now providing one kind to be based on
Java loads the method for dynamic base inside jar bag solving this problem.
Content of the invention
The technical assignment of the present invention is for above weak point, provides a kind of practical, java to load inside jar bag
The method of dynamic base.
A kind of method that java loads dynamic base inside jar bag, it is realized process and is：Dynamic in decompression jar bag first
Storehouse, to temporary file directory, is then loaded by absolute path, deletes the dynamic base producing in EP (end of program).
It implements process：
In the way of file stream, first read the dynamic base in jar bag, this dynamic base determines by judging system type, wherein dynamic
State storehouse suffix is suffix；
Then by way of file output stream is with byte stream, by the temporary folder of the file stream writing system of above-mentioned reading
Under；
Load this dynamic base；
Using using the dynamic base temporary file deleting function deletion generation at the end of loading.
Judge that system type determines the dynamic base in jar bag by calling System.getProperty (), then when
When having required dynamic base under certain class place jar bag certain file directory lower, obtained by function getResourceAsStream
Take file input stream.
Described temporary folder pass through System.getProperty () obtain, then this catalogue newly-built one entitled
The file of " file directory title adds timestamp ", timestamp is obtained by timing tool class, and records this document position.
Load dynamic base using the mode of System.load (), wherein System.load () refers to that parameter is library file
Absolute path.
Dynamic base deletes generated temporary file using the deleteOnExit () function under File at the end of loading；When
When not coming into force under windows, using Runtime.getRuntime () .addShutdownHook come using java order execution
Main function executes deletion.
The method that a kind of java of the present invention loads jar bag the inside dynamic base, has advantages below：
A kind of java that the present invention provides loads the method for jar bag the inside dynamic base it is provided that inside jar bag or jar bag
The position inside specified is gone to load, meet demand when loading dynamic base it is ensured that system clean, and then user friendly exploitation makes
With, practical, applied widely it is easy to promote.
Specific embodiment
With reference to specific embodiment, the invention will be further described.
The method that a kind of java of the present invention loads dynamic base inside jar bag, it is realized process and is：Decompress jar bag first
In dynamic base to temporary file directory, then loaded by absolute path, in EP (end of program) delete produce dynamic base.
It implements process：
In the way of file stream, first read the dynamic base in jar bag, this dynamic base determines by judging system type, wherein dynamic
State storehouse suffix is suffix；
Then by way of file output stream is with byte stream, by the temporary folder of the file stream writing system of above-mentioned reading
Under；
Load this dynamic base；
Using using the dynamic base temporary file deleting function deletion generation at the end of loading.
Judge that system type determines the dynamic base in jar bag by calling System.getProperty (),
System.getProperty () is a static method, is used for all of system variable is set out, then when certain class is located
When having required dynamic base under jar bag certain file directory lower, file input is obtained by function getResourceAsStream
Stream.
Described temporary folder pass through System.getProperty () obtain, then this catalogue newly-built one entitled
The file of " file directory title adds timestamp ", timestamp is obtained by timing tool class, and records this document position.
Load dynamic base using the mode of System.load (), wherein System.load () refers to that parameter is library file
Absolute path.
Dynamic base deletes generated temporary file using the deleteOnExit () function under File at the end of loading；When
When not coming into force under windows, using Runtime.getRuntime () .addShutdownHook come using java order execution
Main function executes deletion.
Described Runtime.getRuntime () .addShutdownHook increases a pass in Java Virtual Machine jvm
The hook closing, when jvm closes, can configured in execution system all be added by method addShutdownHook
Plus hook, after system has executed these hooks, jvm just can close, and it is clear that above-mentioned hook carries out internal memory when jvm closes
The operation that reason, object are destroyed.
Load dynamic base sometimes to must necessarily be placed under the conditions of some in jar bag in external load, so being accomplished by elder generation
Solution presses out, and decompressed position can not at will be placed, so demanding party is put under temp file, records this position, using exhausted
To path load mode load, the file of generation need to be deleted when exiting it is ensured that system clean.
Specifically, the present invention provides an example and is described in detail：
In the way of file stream, first read the dynamic base in jar bag, dynamic base suffix is suffix, passes through
System.getProperty (" os.name ") judges system type to determine；Under the place jar bag of certain class cls certain
There is required dynamic base native.suffix under file directory dll, then pass through function cls.getResourceAsStream
(dll/native.suffix) obtain file input stream
By, under the temporary folder temp of FileOutputStream writing system, temp passes through System.getProperty
(" java.io.tmpdir ") obtains, then in the literary composition of the newly-built entitled dllfile=dll+time (timestamp) of this catalogue
Part presss from both sides, and time passes through System.nanoTime () and obtains, and is to prevent from repeating, and records this document position nativefile
=temp+dllfile/ native.suffix.
Generated temporary file is deleted using the deleteOnExit () function under File during whole EP (end of program),
Do not come into force under windows, using Runtime.getRuntime () .addShutdownHook come using java order execution
Main function executes deletion.
Above-mentioned specific embodiment is only the concrete case of the present invention, and the scope of patent protection of the present invention includes but is not limited to
Above-mentioned specific embodiment, a kind of any java meeting the present invention loads the claim of the method for jar bag the inside dynamic base
The suitable change or replacement that book and any described technical field those of ordinary skill is done to it, all should fall into the present invention's
Scope of patent protection.
Claims (6)
1. a kind of java loads the method for dynamic base inside jar bag it is characterised in that it realizes process is：Decompress jar bag first
In dynamic base to temporary file directory, then loaded by absolute path, in EP (end of program) delete produce dynamic base.
2. a kind of java according to claim 1 loads the method for jar bag the inside dynamic base it is characterised in that it is concrete
The process of realization is：
In the way of file stream, first read the dynamic base in jar bag, this dynamic base determines by judging system type, wherein dynamic
State storehouse suffix is suffix；
Then by way of file output stream is with byte stream, by the temporary folder of the file stream writing system of above-mentioned reading
Under；
Load this dynamic base；
Using using the dynamic base temporary file deleting function deletion generation at the end of loading.
3. a kind of java according to claim 2 loads the method for jar bag the inside dynamic base it is characterised in that passing through to adjust
Judge that system type determines the dynamic base in jar bag with System.getProperty (), then as certain class place jar
When having required dynamic base under bag certain file directory lower, file input stream is obtained by function getResourceAsStream.
4. a kind of java according to claim 2 loads the method for jar bag the inside dynamic base it is characterised in that described face
When file pass through System.getProperty () obtain, then in newly-built entitled " the file directory title of this catalogue
Add timestamp " file, timestamp is obtained by timing tool class, and records this document position.
5. a kind of java according to claim 2 loads the method for jar bag the inside dynamic base it is characterised in that using
The mode of System.load () loads dynamic base, and wherein System.load () refers to the absolute path that parameter is library file.
6. a kind of java according to claim 2 loads the method for dynamic base inside jar bag it is characterised in that dynamic base
Generated temporary file is deleted using the deleteOnExit () function under File at the end of loading；When not giving birth under windows
During effect, using Runtime.getRuntime () .addShutdownHook come using java order execution main function execution
Delete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840741.XA CN106484467A (en) | 2016-09-22 | 2016-09-22 | Method for loading dynamic library in jar package by java |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840741.XA CN106484467A (en) | 2016-09-22 | 2016-09-22 | Method for loading dynamic library in jar package by java |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106484467A true CN106484467A (en) | 2017-03-08 |
Family
ID=58267862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610840741.XA Pending CN106484467A (en) | 2016-09-22 | 2016-09-22 | Method for loading dynamic library in jar package by java |
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| Country | Link |
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| CN (1) | CN106484467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114691242A (en) * | 2022-04-20 | 2022-07-01 | 深圳市元征软件开发有限公司 | Software function implementation method, device, equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541598A (en) * | 2011-12-26 | 2012-07-04 | 深圳联友科技有限公司 | Method and system for dynamically loading component |
| CN105389222A (en) * | 2015-12-15 | 2016-03-09 | 中国科学院声学研究所 | Method, apparatus and system for dynamically calling native interface |
| CN105760196A (en) * | 2016-02-18 | 2016-07-13 | 福建天晴数码有限公司 | Detection method and system for pluggable plug-in program |
-
2016
- 2016-09-22 CN CN201610840741.XA patent/CN106484467A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541598A (en) * | 2011-12-26 | 2012-07-04 | 深圳联友科技有限公司 | Method and system for dynamically loading component |
| CN105389222A (en) * | 2015-12-15 | 2016-03-09 | 中国科学院声学研究所 | Method, apparatus and system for dynamically calling native interface |
| CN105760196A (en) * | 2016-02-18 | 2016-07-13 | 福建天晴数码有限公司 | Detection method and system for pluggable plug-in program |
Non-Patent Citations (2)
| Title |
|---|
| 元澈: "将动态库打包在Jar包并调用的方法", 《HTTPS://BLOG.CSDN.NET/AB7253957/ARTICLE/DETAILS/52242874》 * |
| 永远向前的麦田: "java加载jar包中的库资源", 《HTTPS://BLOG.CSDN.NET/PEYTONZHAO/ARTICLE/DETAILS/51778454》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114691242A (en) * | 2022-04-20 | 2022-07-01 | 深圳市元征软件开发有限公司 | Software function implementation method, device, equipment and storage medium |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20170308 |