CN104424085A - Method for acquiring CPU (Central Processing Unit) and internal memory utilization rate of native machine based on JNI (Java Native Interface) - Google Patents
Method for acquiring CPU (Central Processing Unit) and internal memory utilization rate of native machine based on JNI (Java Native Interface) Download PDFInfo
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- CN104424085A CN104424085A CN201310402356.3A CN201310402356A CN104424085A CN 104424085 A CN104424085 A CN 104424085A CN 201310402356 A CN201310402356 A CN 201310402356A CN 104424085 A CN104424085 A CN 104424085A
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Abstract
Under multiple conditions, the CPU (Central Processing Unit) and internal memory utilization rate of a native machine are quite important to Java application developers, and the developers can perfect and optimize an application by use of the CPU and internal memory utilization rate during application operation, so that better efficiency can be obtained, and more resources can be saved; furthermore the CPU and internal memory utilization rate is an important link for inspecting whether a Java application program achieves specific performances or not, but such information can not be directly obtained by Java. Therefore, if a user wants to acquire the information by use of Java, other technical means are required to be utilized to acquire the information, and the simplest and most convenient method is as follows: the acquired data is transmitted to Java by virtue of a JNI (Java Native Interface) by virtue of interaction of C language and an operation system at the bottom layer, so that the CPU and internal memory utilization rate of native machine can be acquired by a Java application.
Description
Technical field
The present invention relates to a kind of method obtaining the machine CPU and memory usage based on JNI.The invention belongs to field of computer technology.
Background technology
In many cases, the occupancy of the machine CPU and internal memory is very important concerning the developer that Java applies, it can Real-time Obtaining application current system CPU and service condition of internal memory when running, allow developer understand better application impact that system resource is caused, thus improvement and optimization makes application obtain better efficiency, save more resource, meanwhile, this is also check whether java application reaches an important step of particular characteristic.But these information are operating system internal informations, will obtain, and Java can not get the information of operating system from operating system.So, Java is used to get these information if want, just need by using other technologies means to obtain, the easiest and be exactly effectively bottom by C language and operating system mutual, the data got by JNI(Java Native Interface, Java native interface) be transferred to Java, thus make Java apply the occupancy that can get the machine CPU and internal memory.
Summary of the invention
According to the portable ability of Java standard, be the information that cannot get in these operating systems of occupancy of the machine CPU and internal memory.Choice for use JNI, bottom by C language and operating system mutual, the data got by JNI(Java Native Interface, Java native interface) be transferred to Java, Java just can be made to apply the occupancy that can get the machine CPU and internal memory.
Concrete steps are as follows:
Step 1: definition Java interface.A corresponding interface of parameter.
Step 2: generate JNI header file.Use Javah Program Generating JNI header file.
Step 3: add header file and library file.Add required header file and library file.
Step 4: codes implement.Write the acquisition of codes implement to system data.Compile successfully and will produce the dll file identical with project name.
Step 5: introduce and realize bag.Java is used to introduce the dll file of previous step generation.
Step 6: call Java interface, obtains gained system data.
Embodiment
Embodiment one
1. use Myeclips 8.6 development platform to develop design, use expert data library software MySql to carry out data management.
2. define two Java interfaces, obtain CPU usage and memory usage respectively.
3. generate JNI header file.Open order line, use javah program (%JAVA_HOME% bin javah) to generate JNI header file.javah -classpath ./bin com.getCpu.jni.SysInfo。This will generate the header file of a com.getCpu.jni.SysInfo.h under catalogue.
4. add header file and library file.Add the JNI header file that previous step generates, and the required library file such as jvm.lib.
5. realize respectively obtaining system CPU occupancy rate and memory usage by C language code.
6. get acquired system data information by calling Java interface.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (5)
1. define two Java interfaces, obtain CPU usage and memory usage respectively.
2. generate JNI header file; Open order line, use javah program (%JAVA_HOME% bin javah) to generate JNI header file.
3. add header file and library file; Add the JNI header file that previous step generates, and the required library file such as jvm.lib.
4. realize respectively obtaining system CPU occupancy rate and memory usage by C language code.
5. get acquired system data information by calling Java interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402356.3A CN104424085A (en) | 2013-09-07 | 2013-09-07 | Method for acquiring CPU (Central Processing Unit) and internal memory utilization rate of native machine based on JNI (Java Native Interface) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310402356.3A CN104424085A (en) | 2013-09-07 | 2013-09-07 | Method for acquiring CPU (Central Processing Unit) and internal memory utilization rate of native machine based on JNI (Java Native Interface) |
Publications (1)
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| CN104424085A true CN104424085A (en) | 2015-03-18 |
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| CN201310402356.3A Pending CN104424085A (en) | 2013-09-07 | 2013-09-07 | Method for acquiring CPU (Central Processing Unit) and internal memory utilization rate of native machine based on JNI (Java Native Interface) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056708A1 (en) * | 2019-09-23 | 2021-04-01 | 平安科技（深圳）有限公司 | Mass data import method and apparatus, computer device, and storage medium |
Citations (3)
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| CN101917286A (en) * | 2010-07-30 | 2010-12-15 | 上海普元信息技术股份有限公司 | Web performance analysis system and method for realizing cross-browser in internet application system |
| CN102830785A (en) * | 2011-06-17 | 2012-12-19 | 上海果壳电子有限公司 | Quick response system for equipment end input interaction and implementation method thereof |
| CN103279382A (en) * | 2013-04-27 | 2013-09-04 | 北京微云即趣科技有限公司 | Method, Java terminal, native terminal and system for native resource access |
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2013
- 2013-09-07 CN CN201310402356.3A patent/CN104424085A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101917286A (en) * | 2010-07-30 | 2010-12-15 | 上海普元信息技术股份有限公司 | Web performance analysis system and method for realizing cross-browser in internet application system |
| CN102830785A (en) * | 2011-06-17 | 2012-12-19 | 上海果壳电子有限公司 | Quick response system for equipment end input interaction and implementation method thereof |
| CN103279382A (en) * | 2013-04-27 | 2013-09-04 | 北京微云即趣科技有限公司 | Method, Java terminal, native terminal and system for native resource access |
Non-Patent Citations (1)
| Title |
|---|
| YUUKASKY: "JNI实现对CPU使用率的获取", 《博客频道》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021056708A1 (en) * | 2019-09-23 | 2021-04-01 | 平安科技（深圳）有限公司 | Mass data import method and apparatus, computer device, and storage medium |
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Application publication date: 20150318 |