Spring-注解和XML配合使用(本人初学者，不喜勿喷)

首先配置

applicationContext.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:annotation-config/>

<!-- 管理Bean -->
<bean id="userDaoImpl" class="com.demo.daoImpl.UserDaoImpl"/>
<bean id="userServiceImpl" class="com.demo.serviceImpl.UserServiceImpl"/>
<bean id="userServlet" class="com.demo.servlet.UserServlet"/>

</beans>

UserDao

package com.demo.dao;

public interface UserDao {

void demo();

}

UserDaoImpl

package com.demo.daoImpl;

import com.demo.dao.UserDao;

public class UserDaoImpl implements UserDao {

@Override
public void demo() {
System.out.println("dao");
}

}

UserService

package com.demo.service;

public interface UserService {

void demo();

}

UserServiceImpl

package com.demo.serviceImpl;

import javax.annotation.Resource;

import com.demo.dao.UserDao;
import com.demo.service.UserService;

public class UserServiceImpl implements UserService {

@Resource(name="userDaoImpl")
private UserDao userDaoImpl;

@Override
public void demo() {
System.out.println("service");
//调用dao对象中方法
userDaoImpl.demo();
}

}

UserServlet

package com.demo.servlet;

import javax.annotation.Resource;

import com.demo.service.UserService;

public class UserServlet {

@Resource(name="userServiceImpl")
private UserService userServiceImpl;

public void demo(){
System.out.println("servlet");
//调用service对象中的方法
userServiceImpl.demo();
}


}

UserTest

package com.demo.test;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.demo.servlet.UserServlet;

public class UserTest {

@Test
public void demo() {
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(
"applicationContext.xml");

UserServlet servlet = (UserServlet) applicationContext.getBean("userServlet");

servlet.demo();

}

}