spring-context Test Demo

项目结构

pom.xml

    <dependencies>
        <!--        <dependency>-->
        <!--            <groupId>org.springframework</groupId>-->
        <!--            <artifactId>spring-context</artifactId>-->
        <!--            <version>5.2.0.RELEASE</version>-->
        <!--        </dependency>-->
        <dependency>
            <groupId>com.spring</groupId>
            <artifactId>spring-demo</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
    </dependencies>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans>

    <bean id="userMapper" class="com.spring.mapper.impl.UserMapperImpl">
        <property name="name" value="孙笑川"/>
        <property name="password" value="123456"/>
    </bean>

    <bean id="userService" class="com.spring.service.impl.UserServiceImpl">
        <property name="userMapper" ref="userMapper"/>
    </bean>
</beans>

mapper 数据访问层

UserMapper

public interface UserMapper {

    /**
     * 添加
     */
    void add();
}

UserMapperImpl

public class UserMapperImpl implements UserMapper {

    private String name;
    private String password;

    public UserMapperImpl() {
        System.out.println("UserMapper被创建了");
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public void add() {
        System.out.println("UserMapper..." + "name: " + name + ",password: " + password);
    }
}

service 业务逻辑层

UserService

public interface UserService {

    /**
     * 添加
     */
    void add();
}

UserServiceImpl

public class UserServiceImpl implements UserService {

    private UserMapper userMapper;

    public UserServiceImpl() {
        System.out.println("UserService被创建了");
    }

    public void setUserMapper(UserMapper userMapper) {
        this.userMapper = userMapper;
    }

    @Override
    public void add() {
        System.out.println("UserService...");
        userMapper.add();
    }
}

Controller

public class UserController {
    public static void main(String[] args) throws Exception {
        //创建spring容器
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        //BeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource("applicationContext.xml"));
        //从容器中获取userService对象
        UserService userService = (UserService) applicationContext.getBean("userService");
        //业务逻辑处理
        userService.add();

        /*
        UserMapper被创建了
        UserService被创建了
        UserService...
        UserMapper...name: 孙笑川,password: 123456
        */
    }
}