spring复习：（61）自定义CustomAutowireConfigurer

一、自定义注解：

package cn.edu.tju.anno;

import java.lang.annotation.*;

@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface MyQualifier {
    String value() default "";
}

二、定义bean,使用自定义注解；

package cn.edu.tju.anno;

import cn.edu.tju.domain.MovieCatalog;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class MovieRecommender2 {
    @Autowired
    @MyQualifier("thrill")
    public MovieCatalog movieCatalog;
    // ...
}

三、配置文件中配置CustomAutowireConfigurer

<?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
  https://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context
  https://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="cn.edu.tju.anno"/>
    <bean class="cn.edu.tju.domain.SimpleMovieCatalog">
        <qualifier type="cn.edu.tju.anno.MyQualifier" value="thrill"/>
    </bean>

    <bean id="customAutowireConfigurer"
          class="org.springframework.beans.factory.annotation.CustomAutowireConfigurer">
        <property name="customQualifierTypes">
            <set>
                <value>cn.edu.tju.anno.MyQualifier</value>
            </set>
        </property>
    </bean>

</beans>

四、主类

package cn.edu.tju;

import cn.edu.tju.anno.MovieRecommender;
import cn.edu.tju.anno.MovieRecommender2;
import cn.edu.tju.study.service.anno.domain.MyValueCalculator;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Start19 {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new
                ClassPathXmlApplicationContext("beans19.xml");
        MovieRecommender2 bean = applicationContext.getBean(MovieRecommender2.class);
        System.out.println(bean.movieCatalog);


    }
}