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Spring入门

version5.2.7 Download Link

 

ioc:Inversion of Control 控制反转自动创建对象,例如Tomcat容器自动创建servlet等对象。

di:dependency injection 依赖注入提供对象名称即可实现该对象,利用反射机制。

 

maven配置了好久,这玩意一直报错,还慢死了,真的难用,淦!

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.7.RELEASE</version>
    </dependency>

 

 

 

//service01.java

package com.faded828x.service;

public class service01 {

    public service01() {
    }

    public void twoSum(int a, int b){
        System.out.println(a+b);
    }
}
//beans.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="sum1" class="com.faded828x.service.service01"/>
</beans>
//testSum.java

package
com.faded828x; import com.faded828x.service.service01; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class testSum { @Test public void testSum1(){ service01 service01 = new service01(); service01.twoSum(1, 2); } @Test public void testSum2(){ String config = "beans.xml"; ApplicationContext applicationContext = new ClassPathXmlApplicationContext(config); service01 sum1 = (service01) applicationContext.getBean("sum1"); sum1.twoSum(2,3); } }
posted @ 2020-07-20 21:59  Faded828x  阅读(129)  评论(0编辑  收藏  举报