CN110532037A - A kind of Java operation method, system and terminal - Google Patents
A kind of Java operation method, system and terminal Download PDFInfo
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- CN110532037A CN110532037A CN201910758496.1A CN201910758496A CN110532037A CN 110532037 A CN110532037 A CN 110532037A CN 201910758496 A CN201910758496 A CN 201910758496A CN 110532037 A CN110532037 A CN 110532037A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 claims description 14
- 206010021703 Indifference Diseases 0.000 claims description 5
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- 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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- Stored Programmes (AREA)
Abstract
The present invention relates to field of computer technology, a kind of java applet operation method, system and terminal, a kind of java applet operation method include: that the class obtained under agreement path defines list；Class in list is defined and is ranked up according to custom rule；It is judged whether or not class to be loaded defines；Class to be loaded definition completes loading classes then using such definition if it exists；Class to be loaded definition if it does not exist continues to search class definition to be loaded.Method of the present invention may be implemented in Java programming, the real time modifying of operation logic.
Description
Technical field
The present invention relates to field of computer technology, and in particular to a kind of java applet operation method, system and terminal.
Background technique
Java is the language being commonly used in programming, but compared to comparing the dynamic languages such as Python or Php.
Dynamic realtime modification ability is weaker always in the process of running for java applet.
Dynamic change mechanism when a kind of new operation exists in the prior art, as long as according to the path rule of agreement to placement
The Jar packet of latest edition, can be realized the real time modifying of operation logic, and so-called Jar file is the packaging of Java binary
Form, after java class is compiled, boil down to extends the file of entitled Jar, for providing corresponding function.Java applet needs should
Function, the class being loaded in Jar file.Jar file is applied not only to compress and issue, but also for disposing and encapsulating
Library, component and plug-in card program, and can directly be used by the tool as compiler and Java Virtual Machine.Although having there is dynamic
The schemes such as agency or bytecode modification reach similar effect, but developer is required to realize that dynamic proxy even modifies bytecode, skill
Art requires high.
CN102081523A discloses a kind of dynamic loading system, the dynamic loading system include packet generation module,
File uploading module and dlm (dynamic loading module).If system Classloader not successfully beat by load in the dlm (dynamic loading module)
APMB package, then 1 Classloader can be attempted to load the packaging file, if 1 Classloader can not be loaded successfully, 2 Classloaders
It attempts to load.But without the processing logic for proposing load.
In order to solve the above problem, the present invention provides a kind of java applet operation method, system and terminals, relative to existing
Technology, the entire logic that handles are more easier to operate, be easily used.
Summary of the invention
Present invention solves the technical problem that being to provide a kind of java applet operation method, system and terminal.Described one
Kind java applet operation method and system may be implemented in Java programming, the real time modifying of operation logic.
In order to solve the above technical problem, the present invention provides technical solution are as follows:
A kind of java applet operation method characterized by comprising
The class obtained under agreement path defines list；
Class in list is defined and is ranked up according to custom rule；
It is judged whether or not class to be loaded defines；
Class to be loaded definition completes loading classes then using such definition if it exists；
Class to be loaded definition if it does not exist continues to search class definition to be loaded.
Preferably, the custom rule includes: path, filename, the custom rule of time.The rule of agreement can
With customized, but to be that path, filename, time carry out customized for general rule, but is not limited to the customized of these three.
Preferably, the method for continuing to search class to be loaded and defining are as follows:
Judge whether current path has been searched to finish；
It is searched in the path of next priority if lookup is finished；
If finding class to be loaded, returns and judge whether current path has class definition to be loaded；
If not finding class to be loaded, class is prompted to be not present.
Preferably, the class loaded includes timing renewal process.The timing renewal process can be every finger
It fixes time, whether automatically scanning is arranged the file under path and changed, compare and born the same name if finding file with the class loaded, born the same name
Then existing class in jvm is replaced using newest definition to define.
Preferably, the timing renewal process are as follows:
Obtain the path list of agreement；
Compare the path list scanned；
Judge whether two lists are variant；
If indifference completes new route scan task.
Preferably, described to judge whether two lists variant, if judge it is variant if:
Newly-increased path is ranked up according to custom rule；
The class obtained under newly-increased path defines list；
Judge that the class under newly-increased path defines whether to have loaded；
If having loaded the existing class of replacement to define and save the path list scanned；
Complete the scan task of new route.
Preferably, if the class definition judged under newly-increased path does not load, include:
Judge whether newly-increased path has searched to finish；
Continue to search if not searching and finishing the next newly-increased path of processing；
If finding out loading classes, returns and judge that the class under newly-increased path defines whether to have loaded；
If not finding out loading classes, path scan task is completed.
A kind of java applet operating system, comprising:
Class defines list and obtains module: the class defines list and obtains module for obtaining the class definition column under agreement path
Table；
Customized sorting module: the customized sorting module is used to define the class in list and be carried out according to custom rule
Sequence；
Judgment module: the judgment module is used for it is judged whether or not class to be loaded defines；Class to be loaded if it exists
Definition then using such definition, completes loading classes；It is fixed to continue to search class to be loaded for class to be loaded definition if it does not exist
Justice.
Preferably, the java applet operating system further includes the class update module loaded, the loading classes
The process of update module update loading classes are as follows:
Obtain the path list of agreement；
Compare the path list scanned；
Judge whether two lists are variant；
If indifference completes new route scan task.
Described judges whether two lists variant, if judge it is variant if:
Newly-increased path is ranked up according to custom rule；
The class obtained under newly-increased path defines list；
Judge that the class under newly-increased path defines whether to have loaded；
If having loaded the existing class of replacement to define and save the path list scanned；
Complete the scan task of new route.
If the class definition under the newly-increased path of the judgement does not load, include:
Judge whether newly-increased path has searched to finish；
Continue to search if not searching and finishing the next newly-increased path of processing；
If finding out loading classes, returns and judge that the class under newly-increased path defines whether to have loaded；
If not finding out loading classes, path scan task is completed.
A kind of computer readable storage medium, the computer-readable recording medium storage have computer program instructions, should
Program instruction is suitable for being loaded by processor and executing a kind of java applet operation method.
A kind of mobile terminal, including processor and memory, the processor are used to execute to store in memory
Program, to realize a kind of java applet operation method.
Compared with prior art, the device have the advantages that are as follows: use customized java class loader, work as Jvm
Load and when using some class, customized class load the path understood according to appointing, preferentially load it is legal most
New class.Non- loading classes obtain latest edition when in use.Every specified time, automatically scanning is arranged the file under path and is changed,
It compares and whether is born the same name if finding file with the class loaded, bear the same name and then replace existing class in Jvm using newest definition
Definition.The rule of agreement can be customized, including but not limited to path, filename, modification time etc..This scheme can not only be applied
In the modification of code, by the adjustment to loading rule, the safety check for treating loading content could be applicable to, to realize core
The safeguard protection of heart service code.Entire processing logic of the present invention is more easier to operate, and is easily used.In this programme
In, developer can attentively develop fresh code completely, it is only necessary to which this scene is greatly reduced in the path for considering newest operation packet
Under requirement to developer.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is a kind of flow diagram of java applet operation method of the present invention；
Fig. 2 is a kind of loading classes timing update method flow chart of the present invention；
Fig. 3 is a kind of structure chart of java applet operating system of the present invention.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic flow chart of the invention, therefore it only shows process related to the present invention.
Embodiment 1
As shown in Figure 1, the present invention is a kind of java applet operation method, the method specifically:
S1. the class obtained under agreement path defines list；
S2. the class in list list is defined to be ranked up according to custom rule；
S3. it is judged whether or not class to be loaded defines；
S4. class definition to be loaded completes loading classes then using such definition if it exists；
S5. class definition to be loaded if it does not exist, continues to search class definition to be loaded.
Wherein illustrate, the JVM (Java VirtualMachine), claims Java Virtual Machine, java generation can be run
The virtual machine of code, as long as interpreter is transplanted on specific computer according to JVM specification representation, it is ensured that by compiling
Any java code translated can be run on this system, and JVM possesses oneself perfect hardware, such as processor, storehouse, register
Deng, and also there is corresponding instruction system.
Java class loader, java program include many class files, and java class loaders are not depended on from class file acquisition
They are loaded into the operation of JVM memory headroom by the bytecode of platform.
The Jar file: the same repository comprising multiple java class files and related resource.It is java program assembly
A kind of common version of distribution.
Method of the present invention be using customized java Classloader, when jvm is loaded and when using some class,
Customized class, which has loaded, preferentially to load legal newest class according to the path appointed.Every specified time, certainly
Whether the file under dynamic scanning agreement path changes, compare and born the same name if finding file with the class loaded, born the same name then using most
New definition replaces existing class definition in jvm.Non- loading classes obtain latest edition when in use.Concrete implementation method is as follows
Process is realized:
Step S1: the class obtained under agreement path defines list, obtains the class definition for including under specified path.
Step S2: the class in list is defined into list and is ranked up according to custom rule.Custom rule include path,
Loading classes are ranked up by filename, the customized of time, and the rule of this agreement can be customized, enumerate path, text herein
Part name or modification time, but it is not limited to these three.
Step S3: it is judged whether or not class to be loaded defines.Class to be loaded is run first, wherein the class
After compiled, boil down to extends the file of entitled Jar, for providing corresponding function.
Step S4: class to be loaded definition completes loading classes then using such definition if it exists.
Step S5: class to be loaded definition if it does not exist continues to search class definition to be loaded.It is described continue to search to
The method that the class of load defines are as follows: judge whether current path has been searched and finish；If lookup is finished in next priority
It is searched in path.Described after lookup, returns to judgement if having class definition to be loaded and works as in the path of next priority
Whether preceding path has class definition to be loaded.
Using customized java Classloader, when jvm is loaded and uses some class, customized class has loaded meeting
According to the path appointed, legal newest class is preferentially loaded.Non- loading classes obtain latest edition when in use.This scheme
The not only modification of applicable code could be applicable to the safety check for treating loading content by the adjustment to loading rule,
To realize the safeguard protection of core business code.
Embodiment 2
The class loaded includes timing renewal process, is illustrated in figure 2 the stream of the timing renewal process of the class loaded
Journey schematic diagram, the process that the timing updates are as follows:
Obtain the path list of agreement；
Compare the path list scanned；
Judge whether two lists are variant；
Indifference completes new route scan task.
Described judges whether two lists variant, if judge it is variant if:
Newly-increased path is ranked up according to custom rule；
The class obtained under newly-increased path defines list；
Judge that the class under newly-increased path defines whether to have loaded；
If having loaded the existing class of replacement to define and save the path list scanned；
Complete the scan task of new route.
If the class definition under the newly-increased path of the judgement does not load, include:
Judge whether newly-increased path has searched to finish；
Continue to search if not searching and finishing the next newly-increased path of processing；
If finding out loading classes, returns and judge that the class under newly-increased path defines whether to have loaded；
If not finding out loading classes, path scan task is completed.
By the way that every specified time, automatically scanning is arranged the file under path and is changed, compared if finding file whether with
The class loaded is born the same name, and is born the same name and is then replaced existing class definition in jvm using newest definition, realizes automatically updating for class
Process.
Embodiment 3
As shown in figure 3, the present invention provides a kind of systems:
Class defines list and obtains module 1: the class defines list and obtains module for obtaining the class definition column under agreement path
Table；
Customized sorting module 2: the customized sorting module be used for by list class definition according to custom rule into
Row sequence；
Judgment module 3: the judgment module is used for it is judged whether or not class to be loaded defines；Class to be loaded if it exists
Definition then using such definition, completes loading classes；It is fixed to continue to search class to be loaded for class to be loaded definition if it does not exist
Justice.
The java applet operating system further includes the class update module loaded, the loading classes update module
Update the process of loading classes are as follows:
Obtain the path list of agreement；
Compare the path list scanned；
Judge whether two lists are variant；
If indifference completes new route scan task.
Described judges whether two lists variant, if judge it is variant if:
Newly-increased path is ranked up according to custom rule；
The class obtained under newly-increased path defines list；
Judge that the class under newly-increased path defines whether to have loaded；
If having loaded the existing class of replacement to define and save the path list scanned；
Complete the scan task of new route.
If the class definition under the newly-increased path of the judgement does not load, include:
Judge whether newly-increased path has searched to finish；
Continue to search if not searching and finishing the next newly-increased path of processing；
If finding out loading classes, returns and judge that the class under newly-increased path defines whether to have loaded；
If not finding out loading classes, path scan task is completed.
The present invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has computer
Program instruction, the program instruction are suitable for being loaded by processor and executing a kind of java applet operation method.
The present invention also provides a kind of mobile terminal, including processor and memory, the processor is deposited for executing
The program stored in reservoir, to realize a kind of java applet operation method.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and above embodiments are not to limit this
The scope of the patents of invention, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case.
Claims (10)
1. a kind of java applet operation method characterized by comprising
The class obtained under agreement path defines list；
Class in list is defined and is ranked up according to custom rule；
It is judged whether or not class to be loaded defines；
Class to be loaded definition completes loading classes then using such definition if it exists；
Class to be loaded definition if it does not exist continues to search class definition to be loaded.
2. a kind of java applet operation method according to claim 1, which is characterized in that described continuing to search is to be loaded
The method that defines of class are as follows:
Judge whether current path has been searched to finish；
It is searched in the path of next priority if lookup is finished；
If finding class to be loaded, returns and judge whether current path has class definition to be loaded；
If not finding class to be loaded, class is prompted to be not present.
3. a kind of java applet operation method according to claim 1, which is characterized in that the class loaded includes
Timing renewal process.
4. a kind of java applet operation method according to claim 3, which is characterized in that the timing renewal process
Are as follows:
Obtain the path list of agreement；
Compare the path list scanned；
Judge whether two lists are variant；
If indifference completes new route scan task.
5. a kind of java applet operation method according to claim 4, which is characterized in that described two lists of judgement are
It is no variant, if judge it is variant if:
Newly-increased path is ranked up according to custom rule；
The class obtained under newly-increased path defines list；
Judge that the class under newly-increased path defines whether to have loaded；
If having loaded the existing class of replacement to define and save the path list scanned；
Complete the scan task of new route.
6. a kind of java applet operation method according to claim 5, which is characterized in that if described judge newly-increased path
Under class definition do not load, then include:
Judge whether newly-increased path has searched to finish；
Continue to search if not searching and finishing the next newly-increased path of processing；
If finding out loading classes, returns and judge that the class under newly-increased path defines whether to have loaded；
If not finding out loading classes, path scan task is completed.
7. a kind of java applet operating system characterized by comprising
Class defines list and obtains module: the class defines list and obtains module for obtaining the class definition column under agreement path
Table；
Customized sorting module: the customized sorting module is used to define the class in list and be carried out according to custom rule
Sequence；
Judgment module: the judgment module is used for it is judged whether or not class to be loaded defines；Class to be loaded if it exists
Definition then using such definition, completes loading classes；It is fixed to continue to search class to be loaded for class to be loaded definition if it does not exist
Justice.
8. a kind of java applet operating system according to claim 7, which is characterized in that the java applet runs system
System further includes the class update module loaded.
9. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey
Sequence instruction, which is suitable for by processor load and perform claim requires 1 ~ 6 described in any item methods.
10. a kind of mobile terminal, which is characterized in that including processor and memory, the processor is for executing storage
The program stored in device, to realize the described in any item methods of claim 1 ~ 6.
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|---|---|---|---|---|
| CN101174217A (en) * | 2007-11-22 | 2008-05-07 | 上海交通大学 | Method for implementing dynamic update of Java program |
| CN102073525A (en) * | 2011-01-20 | 2011-05-25 | 中兴通讯股份有限公司 | Method and device for dynamically upgrading Web service system based on Java platform |
| US20120222023A1 (en) * | 2011-02-24 | 2012-08-30 | Red Hat, Inc. | Automatic runtime dependency lookup |
| CN102929597A (en) * | 2012-09-24 | 2013-02-13 | 摩卡软件(天津)有限公司 | Java-platform-based web service support method and device |
| CN106980512A (en) * | 2017-05-15 | 2017-07-25 | 中国建设银行股份有限公司 | Update the system and method for JAVA application services |
-
2019
- 2019-08-16 CN CN201910758496.1A patent/CN110532037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174217A (en) * | 2007-11-22 | 2008-05-07 | 上海交通大学 | Method for implementing dynamic update of Java program |
| CN102073525A (en) * | 2011-01-20 | 2011-05-25 | 中兴通讯股份有限公司 | Method and device for dynamically upgrading Web service system based on Java platform |
| US20120222023A1 (en) * | 2011-02-24 | 2012-08-30 | Red Hat, Inc. | Automatic runtime dependency lookup |
| CN102929597A (en) * | 2012-09-24 | 2013-02-13 | 摩卡软件(天津)有限公司 | Java-platform-based web service support method and device |
| CN106980512A (en) * | 2017-05-15 | 2017-07-25 | 中国建设银行股份有限公司 | Update the system and method for JAVA application services |
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Application publication date: 20191203 |