spring在构造函数中注入对象-CFANZ编程社区

类

package com.test.innerbean;

import java.util.Date;

public class Goods {
  private String goodsName;
  private int price;
  private Date date;
  
  public Goods(String name,int price,Date date)
  {
    goodsName=name;
    this.price=price;
    this.date=date;
  }
  
  public void say()
  {
    System.out.println("goodsname:"+goodsName+" price:"+price+" date:"+date);
  }

}

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"  
        xsi:schemaLocation="http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">


    <bean id="goods" class="com.test.innerbean.Goods">
   <span style="white-space:pre">      </span><constructor-arg><value>电脑</value></constructor-arg>
   <span style="white-space:pre">      </span><constructor-arg><value>13</value></constructor-arg>
   <span style="white-space:pre">      </span><constructor-arg><ref bean="date"/></constructor-arg>
    </bean>
    <bean id="date" class="java.util.Date"></bean> 
    
  
</beans>

主要注意的就是这两个文件，注意在构造函数中，如何注入对象

或者也可以使用内部bean

<?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-2.5.xsd">

    <bean id="goods" class="com.test.innerbean.Goods">
        <constructor-arg><value>电脑</value></constructor-arg>
        <constructor-arg><value>13</value></constructor-arg>
        <constructor-arg><bean id="date" class="java.util.Date"></bean> </constructor-arg>
    </bean>
    
    
  
</beans>