• Spring 依赖注入之从不会到稍微会一点儿


    <?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 http://www.springframework.org/schema/beans/spring-beans.xsd">
        <bean id="user" class="io.zekai.entity.User" >
            <!--<constructor-arg type="int" value="1994"></constructor-arg>-->
            <!--<constructor-arg type="String" value="大仙"></constructor-arg>-->
            <property name="id" value="10000"/>
            <property name="name" value="狂尊"/>
        </bean>
    </beans>
    package io.zekai.entity;
    
    /**
     * Created by zekai on 2017/6/3.
     */
    public class User {
        private int id;
        private String name;
    
        public User() {
        }
    
        public User(int id, String name) {
            this.id = id;
            this.name = name;
        }
    
        public int getId() {
            return id;
        }
    
        public void setId(int id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    }
    package io.zekai.entity;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    /**
     * Created by zekai on 2017/6/3.
     */
    public class Main {
        public static void main(String[] args) {
            ApplicationContext context=new ClassPathXmlApplicationContext("./io/zekai/entity/application-context.xml");
            //通过构造器 根据bean的唯一id
            User user=context.getBean(User.class);
            System.out.println(user.getName());
            System.out.println(user.getId());
        }
    }
    <?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 http://www.springframework.org/schema/beans/spring-beans.xsd">
        <bean id="user" class="io.zekai.entity.User" >
            <!--<constructor-arg type="int" value="1994"></constructor-arg>-->
            <!--<constructor-arg type="String" value="大仙"></constructor-arg>-->
            <property name="id" value="10000"/>
            <property name="name" value="狂尊"/>
        </bean>
        <bean id="fatherUser" class="io.zekai.entity.UserFather">
            <property name="fatherName" value="laodies"/>
            <property name="user" ref="user"/><!--ref参考的是xml中的-->
        </bean>
    </beans>
    package io.zekai.entity;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    /**
     * Created by zekai on 2017/6/3.
     */
    public class Main {
        public static void main(String[] args) {
            ApplicationContext context=new ClassPathXmlApplicationContext("io/zekai/entity/application-context.xml");
            UserFather user=context.getBean(UserFather.class);
            System.out.println(user.getFatherName());
        }
    }
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  • 原文地址:https://www.cnblogs.com/tangzekai/p/6939752.html
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