Spring实战——设置普通属性值

刺骨的言语ヽ痛彻心扉 2021-07-24 23:38 423阅读 0赞

**一 配置**

<?xml version="1.0" encoding="GBK"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://www.springframework.org/schema/beans"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">
         <bean id="exampleBean"  class="org.crazyit.app.service.ExampleBean">
               
               <property name="integerField" value="1"/>
               
               <property name="doubleField" value="2.3"/>
         </bean>
    </beans>

**二 Bean**

package org.crazyit.app.service;
    
    public class ExampleBean
    {
         // 定义一个int型的成员变量
         private int integerField;
         // 定义一个double型的成员变量
         private double doubleField;
         // integerField的setter和getter方法
         public void setIntegerField(int integerField)
         {
               this.integerField = integerField;
         }
         public int getIntegerField()
         {
               return this.integerField;
         }
         // doubleField的setter和getter方法
         public void setDoubleField(double doubleField)
         {
               this.doubleField = doubleField;
         }
         public double getDoubleField()
         {
               return this.doubleField;
         }
    }

**三 测试类**

package lee;
    
    
    import org.springframework.context.*;
    import org.springframework.context.support.*;
    
    
    import org.crazyit.app.service.*;
    
    public class BeanTest
    {
        public static void main(String[] args)
        {
            //以类加载路径下的bean.xml文件来创建Spring容器
            ApplicationContext ctx = new
                ClassPathXmlApplicationContext("beans.xml");
            ExampleBean b = ctx.getBean("exampleBean"
                , ExampleBean.class);
            System.out.println(b.getIntegerField());
            System.out.println(b.getDoubleField());
        }
    }

**四 测试结果**

1
    2.3