010_Spring IoC学习笔记beans.xml配置方法_JAVA_编程开发_程序员俱乐部

class="java">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;
    }
}

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

public class UserService {
    private UserDAO userDAO;
    public void add(User user) {
        userDAO.save(user);
    }
    public UserDAO getUserDAO() {
        return userDAO;
    }
    public void setUserDAO(UserDAO userDAO) {
        this.userDAO = userDAO;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
  <bean id="nameonyourdemand" class="com.jt.dao.impl.UserDAOImpl">
  </bean>
  <bean id="userService" class="com.jt.service.UserService">
    <property name="userDAO" ref="nameonyourdemand"/>
  </bean>
</beans>

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
//Dependency Injection
//Inverse of Control
public class UserServiceTest {
    @Test
    public void testAdd() throws Exception {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");                
        UserService service = (UserService)ctx.getBean("userService");        
        User user = new User();
        user.setUsername("zhangsan");
        user.setPassword("zhangsan");
        service.add(user);
    }
}