Spring实战——注入集合值

桃扇骨 2021-07-25 00:43 359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="stoneAxe"  class="org.crazyit.service.impl.StoneAxe"/>
         <bean id="steelAxe"  class="org.crazyit.service.impl.SteelAxe"/>
         
         <bean id="chinese"  class="org.crazyit.service.impl.Chinese">
               <property name="schools">
                    
                    <list>
                         
                         <value>小学</value>
                         <value>中学</value>
                         <value>大学</value>
                    </list>
               </property>
               <property name="scores">
                    
                    <map>
                         
                         <entry key="数学" value="87"/>
                         <entry key="英语" value="89"/>
                         <entry key="语文" value="82"/>
                    </map>
               </property>
               <property name="phaseAxes">
                    
                    <map>
                         
                         <entry key="原始社会"  value-ref="stoneAxe"/>
                         <entry key="农业社会"  value-ref="steelAxe"/>
                    </map>
               </property>
               <property name="health">
                    
                    <props>
                         
                         <prop key="血压">正常</prop>
                         <prop key="身高">175</prop>
                    </props>
                    
               </property>
               <property name="axes">
                    
                    <set>
                         
                         <value>普通的字符串</value>
                         <bean  class="org.crazyit.service.impl.SteelAxe"/>
                         <ref bean="stoneAxe"/>
                         
                         <list>
                               <value>20</value>
                               
                               <set>
                                    <value type="int">30</value>
                               </set>
                         </list>
                    </set>
               </property>
               <property name="books">
                    
                    <list>
                         
                         <value>疯狂Java讲义</value>
                         <value>疯狂Android讲义</value>
                         <value>轻量级Java EE企业应用实战</value>
                    </list>
               </property>
         </bean>
    </beans>

**二 接口**

Axe

package org.crazyit.app.service;
    
    public interface Axe
    {
         // Axe接口里有个砍的方法
         public String chop();
    }

Person

package org.crazyit.service;
    
    public interface Person
    {
         public void test();
    }

**三 实现**

Chinese

package org.crazyit.service.impl;
    import java.util.*;
    import org.crazyit.service.*;
    
    public class Chinese implements Person
    {
         // 下面是系列集合类型的成员变量
         private List<String> schools;
         private Map scores;
         private Map<String , Axe> phaseAxes;
         private Properties health;
         private Set axes;
         private String[] books;
         public Chinese()
         {
               System.out.println("Spring实例化主调bean：Chinese实例...");
         }
         // schools的setter方法
         public void setSchools(List schools)
         {
               this.schools = schools;
         }
         // scores的setter方法
         public void setScores(Map scores)
         {
               this.scores = scores;
         }
         // phaseAxes的setter方法
         public void setPhaseAxes(Map<String , Axe> phaseAxes)
         {
               this.phaseAxes = phaseAxes;
         }
         // health的setter方法
         public void setHealth(Properties health)
         {
               this.health = health;
         }
         // axes的setter方法
         public void setAxes(Set axes)
         {
               this.axes = axes;
         }
         // books的setter方法
         public void setBooks(String[] books)
         {
               this.books = books;
         }
         // 访问上面全部的集合类型的成员变量
         public void test()
         {
               System.out.println(schools);
               System.out.println(scores);
               System.out.println(phaseAxes);
               System.out.println(health);
               System.out.println(axes);
               System.out.println(java.util.Arrays.toString(books));
         }
    }

StoneAxe

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class StoneAxe implements Axe
    {
         public String chop()
         {
               return "石斧砍柴好慢";
         }
    }

SteelAxe

package org.crazyit.app.service.impl;
    import org.crazyit.app.service.*;
    
    public class SteelAxe implements Axe
    {
         public String chop()
         {
               return "钢斧砍柴真快";
         }
    }

**四 测试类**

package lee;
    import org.springframework.context.*;
    import org.springframework.context.support.*;
    import org.crazyit.service.*;
    
    public class BeanTest
    {
         public static void main(String[] args)throws Exception
         {
               ApplicationContext ctx = new
                    ClassPathXmlApplicationContext("beans.xml");
               // 获取容器中Bean，并调用方法。
               Person p = ctx.getBean("chinese" , Person.class);
               p.test();
         }
    }

**五 运行**

Spring实例化主调bean：Chinese实例...
    [小学, 中学, 大学]
    {数学=87, 英语=89, 语文=82}
    {原始社会=org.crazyit.service.impl.StoneAxe@6e1567f1, 农业社会=org.crazyit.service.impl.SteelAxe@56235b8e}
    {血压=正常, 身高=175}
    [普通的字符串, org.crazyit.service.impl.SteelAxe@59494225,  org.crazyit.service.impl.StoneAxe@6e1567f1, [20, [30]]]
    [疯狂Java讲义, 疯狂Android讲义, 轻量级Java EE企业应用实战]