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();
     }