jmeter Variables

本文介绍了如何在JMeter中使用Variable类进行变量的操作,包括获取和设置系统变量的方法。通过put和get方法可以轻松实现变量的传递和使用,这对于自动化测试脚本的编写尤其有用。

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jmeter脚本编辑器中,可以通过Variable类,获取用户自定义的变量,也可以把接口中获取的变量变成jmeter的系统变量。
beanShell中
可以直接使用vars. 来调用Variable中的方法。
以下介绍几种Variable中的方法。
用到最多的是put和get方法
导入 import org.apache.jmeter.threads.JMeterVariables;
1.获取变量
public String get(String key)
Gets the value of a variable, coerced to a String.
Parameters:
key - the name of the variable
Returns:
the value of the variable, or null if it does not exist
使用方法:my_name 是定义的用户变量
String str = vars.get(“my_name”);
通过日志打印出来:log.info(“str_my_name:”+str);
2.通过beanShell定义系统变量
public void put(String key,
String value)
Creates or updates a variable with a String value.
Parameters:
key - the variable name
value - the variable value
使用方法:
第一个参数是变量名,第二个参数是变量值
vars.put(“my_name_var”, my_name_var);
3.获取变量对象
public Object getObject(String key)
Gets the value of a variable (not converted to String).
Parameters:
key - the name of the variable
Returns:
the value of the variable, or null if it does not exist
使用方法:
Object strO = vars.getObject(“my_name”);

### JMeter Project Setup and Configuration Guide For setting up the JMeter environment, one needs to ensure JDK is installed as mentioned previously[^2]. After ensuring that JDK has been properly set up, downloading the JMeter installation package becomes necessary. Once downloaded, follow the instructions provided with the software or seek additional resources online for guidance through the installation process. To integrate JMeter variables into a JUnit test, specific configurations are required within the testing framework. This involves understanding how both tools interact and configuring tests so they can leverage JMeter's capabilities while being executed via JUnit[^1]. #### Installing Required Software Components Ensure all prerequisites such as Java Development Kit (JDK) version 8 or higher have been correctly installed before proceeding further with JMeter setup. Installation packages for JMeter should be obtained from reliable sources; once acquired, these files need to be extracted according to official documentation guidelines. #### Configuring Environment Variables After installing JDK and extracting JMeter binaries, configure system environment variables appropriately. Setting `JAVA_HOME` pointing towards the directory where JDK was placed ensures smooth operation when running scripts dependent upon it. Similarly, adding paths related to bin directories under JMeter will facilitate command-line execution without specifying full file locations each time commands are invoked. #### Running Your First Test Plan Using GUI Mode Launch Apache JMeter by executing its startup script found inside the 'bin' folder after completing previous steps successfully. Utilize graphical user interface features offered during initial runs to familiarize oneself better with available options present throughout menus and toolbars accessible directly from main window panels displayed post-launching application instance. ```bash ./jmeter.sh # For Unix/Linux/MacOS systems. jmeter.bat # For Windows operating system. ``` #### Integrating JUnit Tests Within JMeter Frameworks JUnit integration requires placing `.jar` files containing compiled classes alongside other dependencies needed at runtime into appropriate folders like `/lib/junit`. Additionally, creating new thread groups specifically designed around invoking methods defined externally but referenced internally helps bridge gaps between two distinct yet complementary technologies effectively.
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