spring框架提供了三种方式的基于xml配置依赖注入:属性注入,构造方法注入,工厂方法注入。本文举例演示属性注入。spring
属性注入是经过为bean配置<property>标签为bean的注入属性。类定义时必须定义依赖成员的public setter方法。app
例若有类MasterA框架
package com.bwf51coding.bean;ide
public class MasterA {测试 private int age;this private String name;code public int getAge() {xml return age;blog }ip public void setAge(int age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "MasterA [age=" + age + ", name=" + name + "]"; } }
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applicationContext.xml配置文件配置方式以下:
<bean id="mastera" class="com.bwf51coding.bean.MasterA"> <property name="age" value="20"/> <property name="name" value="Jack"/> </bean> |
测试类代码:
package com.bwf51coding.test;
import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.bwf51coding.bean.MasterA;
public class TestA { public static void main(String[] args) { ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml"); MasterA mastera=(MasterA)ac.getBean("mastera"); System.out.println(mastera); } } |