spring用annotation-autowire配置

蔚落 2022-04-01 09:21 187阅读 0赞

<?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:p="http://www.springframework.org/schema/p"  
xsi:schemaLocation="http://www.springframework.org/schema/beans   
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
http://www.springframework.org/schema/context  
http://www.springframework.org/schema/context/spring-context-3.0.xsd"

xmlns:context="http://www.springframework.org/schema/context" >

<context:annotation-config/>

</beans>

User,java

package annotation.autoWire;  
public class User \{  
private String username;  
private String password;  
public String getUsername() \{  
return username;  
\}  
public void setUsername(String username) \{  
this.username = username;  
\}  
public String getPassword() \{  
return password;  
\}  
public void setPassword(String password) \{  
this.password = password;  
\}  
\}

UserDAO.java

package annotation.autoWire;  
public interface UserDAO \{  
public void save(User user);  
\}

UserDAOImpl.java

package annotation.autoWire;  
public class UserDAOImpl implements UserDAO \{  
public void save(User user) \{  
System.out.println("user saved!");  
\}  
\}

UserService.java

package annotation.autoWire;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.beans.factory.annotation.Qualifier;  
public class UserService \{  
private UserDAO userDAO;  
public void init() \{  
System.out.println("init");  
\}  
  
public void add(User user) \{  
userDAO.save(user);  
\}  
  
public UserDAO getUserDAO() \{  
return userDAO;  
\}  
  
@Autowired//需配置在setter方法上  
public void setUserDAO(@Qualifier("u2") UserDAO userDAO) \{  
this.userDAO = userDAO;  
\}  
  
public void destroy() \{  
System.out.println("destroy");  
\}  
\}

UserServiceTest.java

package annotation.autoWire;  
import org.junit.Test;  
import org.springframework.context.ApplicationContext;  
import org.springframework.context.support.ClassPathXmlApplicationContext;  
public class UserServiceTest \{  
@Test  
public void testAnnotationAutoWire() throws Exception \{  
ApplicationContext ctx = new ClassPathXmlApplicationContext("annotation/autoWire/annotationAutoWire.xml");  
UserService service = (UserService)ctx.getBean("userService");  
service.add(new User());  
System.out.println(service.getUserDAO());  
\}  
\}