Spring_DI利用set方法赋值Demo

Person.java

public class Person {
    private Long pid;
    private String pname;
    private Student student;
    private List list;
    private Set set;
    private Map map;
    private Properties properties;
//get和set方法
}

applicationContext.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-2.5.xsd">
           
<bean name="person" class="cn.test.di.Person">
<!-- 
            property就是代表属性
              在spring中基本类型(包装类型和String)都可以用value来赋值
                                     引用类型用ref赋值
-->
    <property name="pid" value="5"></property>
    <property name="pname" value="张三"></property><!-- 基本数据类型 -->
    <property name="student" ref="student"></property><!-- 引用类型 -->
    <property name="list">
        <list>
            <value>list1</value>
            <value>list2</value>
            <ref bean="student"/>
        </list>        
    </property>
    
    <property name="set">
        <set>
            <value>set1</value>
            <value>set2</value>
            <ref bean="student"/>
        </set>
    </property>
    <property name="map">
        <map>
            <entry key="map1">
                <value>map1</value>
            </entry>
            <entry key="map2">
                <value>map2</value>
            </entry>
            <entry key="map3">
                <ref bean="student"/>
            </entry>
        </map>
    </property>
    <property name="properties">
        <props>
            <prop key="pro1">
                pro1
            </prop>
        </props>
    </property>
</bean>
<bean name="student" class="cn.test.di.Student"></bean>
</beans>

测试

@Test
    public void doSome(){
        ApplicationContext applicationContext=new ClassPathXmlApplicationContext("cn/test/di/applicationContext.xml");
        Person person= (Person) applicationContext.getBean("person");
        System.err.println(person.getPid());
        System.err.println(person.getPname());
        person.getStudent().say();
        List list=person.getList();
        for(int i=0;i<list.size();i++){
            System.err.println(list.get(i).toString());
        }

处理使用上面的get方法进行赋值外，还可以通过构造函数来赋值，首先在类中添加构造函数，然后进行配置

public Person(String pname, Student student) {
        this.pname = pname;
        this.student = student;
    }

<!-- 
            构造函数的参数
              index  第几个参数，下标从0开始
              type   参数的类型
              ref    如果类型是引用类型，赋值
              value  如果类型是基本类型，赋值
             说明：
                只能指定一个构造函数
-->
<constructor-arg index="0" type="java.lang.String" value="李四"></constructor-arg>
<constructor-arg index="1" type="cn.test.di2.Student" ref="student"></constructor-arg>

@Test
    public void doSome(){
        ApplicationContext applicationContext=new ClassPathXmlApplicationContext("cn/test/di2/applicationContext.xml");
        Person person= (Person) applicationContext.getBean("person");
        System.err.println(person.getPname());
        person.getStudent().say();
    }