一、安装jdk-8u191-windows-x64.exe

新建系统环境变量JAVA_HOME并配置Java搜索路径位置

二、安装IntelliJ IDEA

三、用New Project按钮创建工程（TestNG_Example)

四、安装TestNG和Create TestNG XML插件

五、如图创建一个Java类HelloWorld

import org.testng.annotations.Test;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.AfterClass;

public class HelloWorld {

    @BeforeClass
    public void Initiate() {
        System.out.println("This is before class");
    }

    @AfterClass
    public void FinalClose() {
        System.out.println("This is after class");
    }

    @Test
    public void Function1() {
        System.out.println("This is TestNG test case1");
    }

    @Test
    public void Function2() {
        System.out.println("This is TestNG test case2");
    }

    @Test
    public void Function3() {
        System.out.println("This is TestNG test case3");
    }
}

六、pom.xml文件配置如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>TestNG_Example</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.testng/testng -->
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.14.3</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

七、Create TestNG XML

八、全选用Ctrl+Alt+L格式化testng.xml

九、在testng.xml文件添加类HelloWorld

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd">
<suite name="All Test Suite">
    <test verbose="2" preserve-order="true" name="C:/project/TestNG_Example/src/test/java">
        <classes>
            <class name="HelloWorld"></class>
        </classes>
    </test>
</suite>