简单介绍

Apache JMeter是一个开源、纯Java编写，设计来为应用程序进行功能行为测试以及性能衡量的软件。

Apache JMeter may be used to test performance both on static and dynamic resources, Web dynamic applications.
It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types.

Apache JMeter features include:

Ability to load and performance test many different applications/server/protocol types:
- Web - HTTP, HTTPS (Java, NodeJS, PHP, ASP.NET, …)
- SOAP / REST Webservices
- FTP
- Database via JDBC
- LDAP
- Message-oriented middleware (MOM) via JMS
- Mail - SMTP(S), POP3(S) and IMAP(S)
- Native commands or shell scripts
- TCP
- Java Objects
Full featured Test IDE that allows fast Test Plan recording (from Browsers or native applications), building and debugging.
CLI mode (Command-line mode (previously called Non GUI) / headless mode) to load test from any Java compatible OS (Linux, Windows, Mac OSX, …)
A complete and ready to present dynamic HTML report
Easy correlation through ability to extract data from most popular response formats, HTML, JSON , XML or any textual format
Complete portability and 100% Java purity.
Full multi-threading framework allows concurrent sampling by many threads and simultaneous sampling of different functions by separate thread groups.
Caching and offline analysis/replaying of test results.
Highly Extensible core:
- Pluggable Samplers allow unlimited testing capabilities.
- Scriptable Samplers (JSR223-compatible languages like Groovy and BeanShell)
- Several load statistics may be chosen with pluggable timers.
- Data analysis and visualization plugins allow great extensibility as well as personalization.
- Functions can be used to provide dynamic input to a test or provide data manipulation.
- Easy Continuous Integration through 3^rd party Open Source libraries for Maven, Gradle and Jenkins.

简单示例：

下面进行压力测试，模拟100用户同时调用下的运行情况，由于此次关注点在如何使用JMeter，服务接口的内部实现就略过，可自主实现。

前期准备

准备好要测试的服务接口，此次测试地址如下，该接口有两个方法，接收一个整数：

接口方法
下载并运行JMeter：
jmeter下载地址
这里测试环境为windows，下载后解压后运行jmeter.bat

建立和测试计划

首先选择测试计划，添加线程组：

添加线程组

添加后进行配置：

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这里配置100并发，只执行一次。
创建Http请求并配置：

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下面配置的是调用/add/{num}使用路径变量形式的url，如果是不是路径参数的话，去掉url后面的${num}，在下面Parameters页面添加名称为num的参数，值不用设置，同样使用随后我们创建的随机变量配置来生成即可。

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