Spring-常用依赖及配置

##常用依赖
```xml
<dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.2</version>
        </dependency>

        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.10.RELEASE</version>
        </dependency>
        
         <dependency>
                    <groupId>org.aspectj</groupId>
                    <artifactId>aspectjweaver</artifactId>
                    <version>1.9.1</version>
         </dependency>
    </dependencies>
```
##注解说明
    - 都是用来自动装箱的，都可以放在属性字段上
    - 如果类型和名字都找不到的情况下，就会报错
    - @Autowired :自动装箱通过类型，名字【区别：有提示信息】【常用】
        如果Autowired不能唯一自动装配上属性，则需要通过@Qualifier(value="xxx")
    - @Nullable：字段标记了这个注解，说明这个字段可以为null
    - @Resource : 自动装配通过名字，类型【区别：没有提示信息】
##Spring常用配置
```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:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">


        <context:component-scan base-package="cn.scitc.pojo"></context:component-scan>


        <bean id="cat" class="cn.scitc.pojo.cat"/>
        <bean id="dog" class="cn.scitc.pojo.dog"/>
        <!--<bean id="cat11" class="cn.scitc.pojo.cat"/>-->
        <!--<bean id="dog11" class="cn.scitc.pojo.dog"/>-->
        <bean id="person" class="cn.scitc.pojo.person"/>

</beans>
```