标签:spring
一:案例截图
二:基本代码
Employee.java
<span style="font-size:14px;">package com.sp.constructor; public class Employee { private String name; private int age; public Employee(){ System.out.println("无惨构造函数"); } public Employee(String name){ System.out.println("一个参数构造函数"); this.name=name; } <span style="color:#3366ff;">public Employee(String name,int age){ System.out.println("两个参数的构造函数"); this.name=name; this.age=age; }</span> public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } } </span>
<span style="font-size:14px;"><?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" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 配置一个雇员对象 --> <bean id="employee" class="com.sp.constructor.Employee"> <span style="color:#3366ff;"><!-- 通过构造函数注入属性值 --> <!-- 前面其中一个构造函数有两个属性值,所以这里就会自动指向两个参数的构造函数 --></span> <constructor-arg index="0" type="java.lang.String" value="Spring"/> <constructor-arg index="1" type="int" value="23"/> </bean> </beans></span>
<span style="font-size:14px;">package com.sp.constructor; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test { public static void main(String[] args) { ApplicationContext ac=new ClassPathXmlApplicationContext("com/sp/constructor/beans.xml"); Employee ee=(Employee) ac.getBean("employee"); System.out.println(ee.getName()); } }</span>
两个参数的构造函数
Spring
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标签:spring
原文地址:http://blog.csdn.net/dzy21/article/details/48048561