setter方法注入（Java EE 学习笔记07）

server/2024/12/2 12:10:42/

属性setter方法注入是Spring最主流的注入方法，这种注入方法简单、直观，它是在被注入的类中声明一个setter方法，通过setter方法的参数注入对应的值。

案例：

① 创建User2实体，配置setter方法

java">package com.lq.entities;/*** @Author: Luqing Teacher* @CreateTime: 2024-11-27* @Description: 用户2* @Version: 1.0*/public class User2 {private int id;private String name;private String pwd;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;}public String getPwd() {return pwd;}public void setPwd(String pwd) {this.pwd = pwd;}@Overridepublic String toString() {return "User2{" +"id=" + id +", name='" + name + '\'' +", pwd='" + pwd + '\'' +'}';}
}

② 创建applicationContext-user2.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.xsd"><bean id="user2" class="com.lq.entities.User2"><property name="id" value="2"></property><property name="name" value="lq2"></property><property name="pwd" value="456"></property></bean></beans>

③ 测试类

java">package com.lq.test;import com.lq.entities.User2;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** @Author: Luqing Teacher* @CreateTime: 2024-11-27* @Description: 测试2* @Version: 1.0*/public class TestUser2 {public static void main(String[] args){ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext-user2.xml");User2 user2 = applicationContext.getBean("user2", User2.class);System.out.println(user2);}
}