XML约束和驱动

Spring

基本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
        https://www.springframework.org/schema/beans/spring-beans.xsd">

    
	<bean id="mysqlImpl" class="com.chen.dao.UserDaoMysqlImpl"></bean>
    
    <bean id="UserServiceImpl" class="com.chen.service.UserServiceImpl">

</beans>

---

C/P命名空间

<?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:c="http://www.springframework.org/schema/c"
       xsi:schemaLocation="http://www.springframework.org/schema/beans

        https://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="user" class="com.chen.pojo.User" p:name="辰呀" p:age="18"/>


    <!-- c 命名空间注入，通过构造器注入：construct-args -->
    <bean id="user2" class="com.chen.pojo.User" c:age="22" c:name="辰呀cc" scope="singleton"/>
</beans>

---

注解开发

<?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:contex="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 指定要扫描的包 ,这个包下的注解就会生效 -->
    <contex:component-scan base-package="com.chen.pojo"/>
    <!-- 注解驱动 -->
    <context:annotation-config/>
</beans>

---

AOP

xml方式

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:contex="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 指定要扫描的包 ,这个包下的注解就会生效 -->
    <contex:component-scan base-package="c"/>
<!--    <bean id="userDao" class="c.annotation.UserDaoImpl"/>-->
    <!-- 采用自定义类实现SOP  -->
    <bean id="diy" class="c.aspectj.log.MyPointCut"/>
    <aop:config>
        <!-- 自定义切面，ref： 要引用的类 -->
        <aop:aspect ref="diy">
            <!-- 切入点 -->
            <aop:pointcut id="point" expression="execution(* c.annotation.UserDaoImpl.*(..))"/>
            <!-- 通知 -->
            <aop:before method="before" pointcut-ref="point"/>
            <aop:after method="after" pointcut-ref="point"/>
            <aop:around method="around" pointcut-ref="point"/>
            <aop:after-throwing method="AfterThrowing" pointcut-ref="point" throwing="exception"/>
        </aop:aspect>
    </aop:config>
</beans>

annotation方式：

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:contex="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">

    <contex:component-scan base-package="c"/>
    <!-- 注解实现AOP -->
    <!-- 切面类 -->
    <bean id="annotationPointCut" class="c.aspectj.annotaion.SpringJUnit4ClassRunner"/>
    <!-- 开启注解支持   JDK(默认：proxy-target-class="true") -->
    <aop:aspectj-autoproxy />

</beans>

---

jdbc驱动

• jar包

<dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.44</version>
</dependency>

//1.加载驱动
Class.forName("com.mysql.jdbc.Driver");

//2.url
String url = "jdbc:mysql://localhost:3306/c2c?useUnicode=true&characterEncoding=utf8&useSSL=false";
String username = "root";
String password = "123456";