Spring的annotation注入实例

一、Spring的annotation注入实例

1、实例整体结构：

        

Boss

package com.model;

import org.springframework.beans.factory.annotation.Autowired;

public class Boss {
	@Autowired
	Car car;
	@Autowired
	Office office;
	public Car getCar() {
		return car;
	}
	public void setCar(Car car) {
		this.car = car;
	}
	public Office getOffice() {
		return office;
	}
	public void setOffice(Office office) {
		this.office = office;
	}
}

Car.java

package com.model;

public class Car {
	String brand;
	int price;
	public String getBrand() {
		return brand;
	}
	public void setBrand(String brand) {
		this.brand = brand;
	}
	public int getPrice() {
		return price;
	}
	public void setPrice(int price) {
		this.price = price;
	}
	
}

Office.java

package com.model;

public class Office {
	String officeNo;

	public String getOfficeNo() {
		return officeNo;
	}

	public void setOfficeNo(String officeNo) {
		this.officeNo = officeNo;
	}
}

Test

package test;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.model.Boss;

/**
 * @author smallstrong
 *
 */
public class UserServiceTest {
	@Test
	public void testAdd() throws Exception {
		ApplicationContext applicationcontext = new ClassPathXmlApplicationContext("beans.xml");
		Boss boss = (Boss)applicationcontext.getBean("boss");
		System.out.println(boss.getCar().getBrand());
		System.out.println(boss.getCar().getPrice());
		System.out.println(boss.getOffice().getOfficeNo());
	}
}

beans.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: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">
        <context:annotation-config/>     
 <!-- 移除 boss Bean 的属性注入配置的信息 -->     
    <bean id="boss" class="com.model.Boss"/>     
    <bean id="office" class="com.model.Office">     
        <property name="officeNo" value="001"/>     
    </bean>     
    <bean id="car" class="com.model.Car">     
        <property name="brand" value=" 红旗 CA72"/>     
        <property name="price" value="2000"/>     
    </bean> 
  
</beans>

总结：其实annotation只是简化了配置文件的关联，避免每个类都需在配置文件中关联好。