【SpringFramework】Spring IoC-基于注解的实现

<?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"
       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">
    <!--开启组件扫描功能-->
    <!--1. 基本方式：全包扫描-->
    <context:component-scan base-package="com.sheeprunner.spring.c.ioc_annotation" />
</beans>

<context:component-scan base-package="com.sheeprunner.spring.c.ioc_annotation" />

<context:component-scan base-package="com.sheeprunner.spring.c.ioc_annotation">
    <!-- context:exclude-filter标签：指定排除规则 -->
    <!-- 
         type：设置排除或包含的依据
        type="annotation"，根据注解排除，expression中设置要排除的注解的全类名
        type="assignable"，根据类型排除，expression中设置要排除的类型的全类名
    -->
    <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    <!--<context:exclude-filter type="assignable" expression="com.atguigu.spring6.controller.UserController"/>-->
</context:component-scan>

<context:component-scan base-package="com.atguigu" use-default-filters="false">
    <!-- context:include-filter标签：指定在原有扫描规则的基础上追加的规则 -->
    <!-- use-default-filters属性：取值false表示关闭默认扫描规则 -->
    <!-- 此时必须设置use-default-filters="false"，因为默认规则即扫描指定包下所有类 -->
    <!-- 
         type：设置排除或包含的依据
        type="annotation"，根据注解排除，expression中设置要排除的注解的全类名
        type="assignable"，根据类型排除，expression中设置要排除的类型的全类名
    -->
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    <!--<context:include-filter type="assignable" expression="com.atguigu.spring6.controller.UserController"/>-->
</context:component-scan>

package org.springframework.beans.factory.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target({ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.PARAMETER, ElementType.FIELD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Autowired {
    boolean required() default true;
}

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'bookController' defined in file [D:\SheepRunner\GitProjects\springexecute\Cspring_ioc_annotation\target\classes\com\sheeprunner\spring\c\ioc_annotation\controller\BookController.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'bookServiceImpl': Unsatisfied dependency expressed through method 'setBookDao' parameter 0; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.sheeprunner.spring.c.ioc_annotation.dao.BookDao' available: expected single matching bean but found 2: bookDaoImpl,bookDaoRedisImpl

package com.atguigu.spring6.dao.impl;
import com.atguigu.spring6.dao.UserDao;
import org.springframework.stereotype.Repository;
@Repository("myUserDao")
public class UserDaoImpl implements UserDao {
    @Override
    public void print() {
        System.out.println("Dao层执行结束");
    }
}

package com.atguigu.spring6.dao.impl;
import com.atguigu.spring6.dao.UserDao;
import org.springframework.stereotype.Repository;
@Repository("myUserDao")
public class UserDaoImpl implements UserDao {
    @Override
    public void print() {
        System.out.println("Dao层执行结束");
    }
}