SSM整合之Spring環境搭建

將service和dao的類交給ioc的容器去做管理，並且使用註解的方式
在resources編寫xml文件(創建Spring Config) applicationContext

<?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"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    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
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd
     http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 開啓註解掃描，要掃描的是service和dao層的註解，要忽略web層註解，因爲web層讓SpringMVC框架 去管理 -->
<context:component-scan base-package="cn.itcast">
 <!-- 配置要忽略的註解 --> 
 <context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

測試service是否可用，在AccountServiceImpl類前加上@Service(“accountService”)

@Service("accountService")
public class AccountServiceImpl implements AccountService 

創建Test包進行測試，正確輸出則Spring環境搭建成功（⚠️ 警告問題：只需要把log4j文件導入resources即可，可以忽略）

public class testSpring {

    @Test
    public void run1() {
        //加載配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //獲取對象
        AccountService as = (AccountService) ac.getBean("accountService");
        //調用方法
        as.findAll();
    }
}