Spring Maven注解接口注入

偏执的太偏执、 2022-03-08 12:50 253阅读 0赞

Resource指出类的别名，spring在xml中查找id或name与之对应

xml
    <?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:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
            <bean name = "userService" class = "com.hxzy.springbase.service.impl.UserServiceImpl"  scope = "singleton" autowire = "byType"></bean>     
            <bean id = "userDao" class = "com.hxzy.springbase.dao.impl.UserDaoImpl"></bean>
    </beans>
    
    测试
    public class Test1 {
    	@Test
    	public void test1() {
    		System.out.println("1");
    		BeanFactory bean = new ClassPathXmlApplicationContext("./spring-bean.xml");
    		System.out.println("2");
    		UserServiceImpl userServiceImpl = (UserServiceImpl) bean.getBean("userService");
    		System.out.println("3");
    		userServiceImpl.addUser();
    	}
    }
    
    service
    public class UserServiceImpl {
    	private UserDao userDao;
    
    	public void addUser() {
    		userDao.addUser();
    	}
    
    	@Autowired
    	public void setUserDao(@Qualifier("userDao")UserDao userDao) {
    		System.out.println("进去了set");
    		this.userDao = userDao;
    	}
    
    	public UserDao getUserDao() {
    		return userDao;
    	}
    }

无注解接口注入

public class Test1 {
    	@Test
    	@Resource(name = "userService")
    	public void test1() {
    		System.out.println("1");
    		BeanFactory bean = new ClassPathXmlApplicationContext("./spring-bean.xml");
    		System.out.println("2");
    		UserServiceImpl userServiceImpl = (UserServiceImpl) bean.getBean("userService");
    		System.out.println("3");
    		userServiceImpl.addUser();
    	}
    }
    
    xml
    <?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:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
          <context:component-scan base-package = "com.hxzy.springbase" scoped-proxy = "interfaces"></context:component-scan> 
            <bean name = "userDao" class = "com.hxzy.springbase.dao.impl.UserDaoImpl"></bean> -->
            <bean name = "userService" class = "com.hxzy.springbase.service.impl.UserServiceImpl"  scope = "singleton" autowire = "byType"></bean>     
            </beans>
    
    service
    public class UserServiceImpl {
    	private UserDao userDao;
    
    	public void addUser() {
    		userDao.addUser();
    	}
    
    	public void setUserDao(UserDao userDao) {
    		System.out.println("进去了set");
    		this.userDao = userDao;
    	}
    
    	public UserDao getUserDao() {
    		return userDao;
    	}
    }

pom

<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>com.hxzy</groupId>
    	<artifactId>springbase</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>jar</packaging>
    
    	<name>springbase</name>
    	<url>http://maven.apache.org</url>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    	</properties>
    
    	<dependencies>
    		
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>4.0</version>
    			<scope>test</scope>
    		</dependency>
    		
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-beans</artifactId>
    			<version>4.0.0.RELEASE</version>
    		</dependency>
    
    		<dependency>
    			<groupId>org.springframework</groupId>
    			<artifactId>spring-context</artifactId>
    			<version>4.0.0.RELEASE</version>
    		</dependency>
    	</dependencies>
    </project>