Spring 构造参数的注入方式

http://dongguoh.iteye.com/blog/113518

package com.gjx.spring;   
  
import java.util.Date;   
  
public class HelloBean {   
    private String name;   
  
    private String helloWord;   
       
    private Date date;   
  
    public HelloBean() {   
    }   
    public HelloBean(String helloWord,Date date){   
        this.helloWord=helloWord;   
        this.date=date;   
    }   
       
    public HelloBean(String name, String helloWord) {   
        this.name = name;   
        this.helloWord = helloWord;   
    }   
  
    public String getHelloWord() {   
        return helloWord;   
    }   
  
    public void setHelloWord(String helloWord) {   
        this.helloWord = helloWord;   
    }   
  
    public String getName() {   
        return name;   
    }   
  
    public void setName(String name) {   
        this.name = name;   
    }   
    public Date getDate() {   
        return date;   
    }   
    public void setDate(Date date) {   
        this.date = date;   
    }   
  
} 

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">  
  
<beans>  
    <!-- 默认的情况下是按照　参数的顺序　注入　当指定index索引后就可以改变注入参数的顺序 -->  
    <bean id="helloBean" class="com.gjx.spring.HelloBean">  
        <constructor-arg index="0">  
            <value>冬国</value>  
        </constructor-arg>  
        <constructor-arg index="1">  
            <value>你好　</value>  
        </constructor-arg>  
    </bean>  
       
    <!-- 当构造函数的参数相同时，Spring会自动找到配制的构造方法 也可以用 type 来明确指定要用那个类型-->  
    <bean id="date" class="java.util.Date" />  
    <bean id="helloBean2" class="com.gjx.spring.HelloBean">  
        <constructor-arg index="0">  
            <value>哈哈</value>  
        </constructor-arg>  
        <constructor-arg index="1" type="java.util.Date">  
            <ref bean="date"/>  
        </constructor-arg>  
    </bean>    
       
       
</beans>