spring-demo-fangneng（编写代码测试）

文件目录：

 

在pom.xml文件内导入：

<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-expression -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jcl -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jcl</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
</dependencies>
UserServiceImpl文件：

public class UserServiceImpl implements UserService {

public void saveUser() {
System.out.println("service的save方法执行了");
}
}
UserService文件：

public interface UserService{
void saveUser();
}
applicationContext文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util
https://www.springframework.org/schema/util/spring-util.xsd
">

<!-- bean definitions here -->

<!-- 此标签的作用是利用反射机制将UserServiceImpl类的实例交给Spring容器 -->
<bean id="userService" class="service.impl.UserServiceImpl"/>
</beans>
UserTest文件：

public class UserTest {

public static void main(String[] args){
ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
UserService service = (UserService) context.getBean("userService");
service.saveUser();
}
}

运行测试文件：