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
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; } public String toString() { return "User2{" + "id=" + id + ", name='" + name + '\'' + ", pwd='" + pwd + '\'' + '}'; } }
② 创建applicationContext-user2.xml
<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
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); } }
④ 结果如下：
