依赖注入之各种类型属性的set注入语法

各种类型属性的注入语法

1、代码：

<?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="address" class="com.blackcat.pojo.Address">
        <property name="address" value="杭州"/>
    </bean>
    <bean id="student" class="com.blackcat.pojo.Student">
        <!--第一种：普通值注入，value-->
        <property name="name" value="黑猫"/>
        <!--第二种：Bean注入，ref-->
        <property name="address" ref="address"/>
        <!--数组-->
        <property name="books">
            <array>
                <value>红楼梦</value>
                <value>三国演义</value>
                <value>西游记</value>
                <value>水浒传</value>
            </array>
        </property>
        <!--集合-->
        <property name="hobbys">
            <list>
                <value>听歌</value>
                <value>敲代码</value>
                <value>看电影</value>
            </list>
        </property>
        <!--map-->
        <property name="cart">
            <map>
               <entry key="身份证" value="23453523453"/>
                <entry key="银行卡" value="232t59832579"/>

            </map>
        </property>
        <!--set-->
        <property name="games">
            <set>
                <value>LoL</value>
                <value>honour of king</value>
                <value>BOBO</value>
            </set>
        </property>
        <!--null-->
        <!--<property name="wife" value=""/>-->
        <property name="wife">
            <null/>
        </property>

        <property name="info">
           <props>
               <prop key="学号">145235252626</prop>
               <prop key="姓名">小佳</prop>
               <prop key="性别">女</prop>
               <prop key="年龄">21</prop>

               <prop key="driver">华为</prop>
               <prop key="url">huawei</prop>
               <prop key="username">root</prop>
               <prop key="password">123456</prop>
           </props>
        </property>
    </bean>

</beans>

2、测试：

import com.blackcat.pojo.Student;
        import org.springframework.context.ApplicationContext;
        import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        Student student = (Student) context.getBean("student");
//        System.out.println("student.getAddress() = " + student.getAddress());
        System.out.println("student.toString() = " + student.toString());
    }
}

3、结果：

student.toString() = Student{name='黑猫', address=Address{address='杭州'}, books=[红楼梦, 三国演义, 西游记, 水浒传], hobbys=[听歌, 敲代码, 看电影], cart={身份证=23453523453, 银行卡=232t59832579}, games=[LoL, honour of king, BOBO], wife='null', info={学号=145235252626, 性别=女, password=123456, url=huawei, driver=华为, 姓名=小佳, username=root, 年龄=21}}

Process finished with exit code 0