Spring IOC 基本操作

实用工具：Idea2019版本

一、创建一个meven-webAPP

二、手动创建 java和resources文件夹

三、在pom.xml中导入spring依赖

  org.springframework
  spring-webmvc
  ${spring.version}



  org.springframework
  spring-jdbc
  ${spring.version}



  org.springframework
  spring-context
  ${spring.version}



  org.springframework
  spring-aop
  ${spring.version}



  org.springframework
  spring-core
  ${spring.version}



  org.springframework
  spring-test
  ${spring.version}

四、创建com.hxci.ioc包，存放类和接口

五、 在dao层接口中写入say()方法并在实现类中实现方法.service同理

package com.hxci.ioc;

public interface UserDao {
    public void say();
}

package com.hxci.ioc;

public class UserDaoImpl implements UserDao {
    @Override
    public void say() {
        System.out.println("userDao say hello 呼兵!");
    }
}

 

package com.hxci.ioc;

public interface UserService {
    public void say();
}

package com.hxci.ioc;

public class UserSerivceImpl implements UserService {

    private UserDao userDao;

        
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public void say() {
        this.userDao.say();
        System.out.println("userSerivce say hello 呼兵！");
    }
}

 

 六、resources中创建applicationContext.xml

七、创建测试类进行测试

package com.hxci.ioc;

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

public class TestIoC {
    public static void main(String[] args){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDao userDao = (UserDao)applicationContext.getBean("userDao");
        userDao.say();
       
    }
}

八、 测试成功：

 附加：DI注入

创建DI测试类测试Di

package com.hxci.ioc;

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

public class TestDi {
    public static void main(String[] args){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService userService = (UserService)applicationContext.getBean("userSerivce");
        userService.say();
    }
}

测试成功：