Java 向同一类的不同实例注入属性（Spring框架）

“如果需要，请将其标记为重复，但请在注释中留下解决方案链接。”
我有一个类“Assignment22.Player.java”，我必须创建其中的5个实例并向它们注入属性。我可以通过在XML文件本身中硬编码将属性注入实例。但我希望这样做，以防将来有“更改”需求，我不必转到XML文件来更改属性。这可以通过使用一个/多个属性文件来实现
以下是我试图做的：
我为五个不同的实例创建了五个属性文件。但是，由于类是相同的，因此每个对象的属性名称都是相同的。所以看起来，我不能这样使用属性文件
以下是我尝试的xml代码：

  <!-- country bean  -->
  <bean id = "country1" class="Assignmetn22.Country">
    <property name= "countryId" value="${countryId}"></property>
    <property name= "countryName" value="${countryName}"></property>
  </bean>
  <bean id = "country2" class="Assignmetn22.Country">
   <!-- since the properties' names are same there won't any effect if assign them different values 
  and use them for different beans.
   -->
 </bean>


 <bean id = "player1" class="Assignment22.Player">
   <property name="playerId"  value="${playerId}"></property>
   <property name="playerName" value="${playrName}"></property>
   <property name="country" ref="country1"></property>
 </bean>

 <bean id = "player2" class="Assignment22.Player">
   <!-- same properties' names for other bean -->
   <!-- since the properties' names are same there won't any effect if assign them different values 
  and use them for different beans.
   -->
   <!--   <property name="playerId"  value="${playerId}"></property>
          <property name="playerName" value="${playrName}"></property>
          <property name="country" ref="country2"></property>
    -->
  </bean>


  <!--loading the properties file-->
    <bean id= "placeholderConfig1" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
     <property name="location"  value="classpath:p1.properties"></property>
   </bean>
   <bean id= "placeholderConfig2" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location"  value="classpath:p2.properties"></property>
  </bean>
   <bean id= "placeholderConfig3" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location"  value="classpath:p3.properties"></property>
   </bean>
  <bean id= "placeholderConfig4" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="location"  value="classpath:p4.properties"></property>
 </bean>
 <bean id= "placeholderConfig5" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
   <property name="location"  value="classpath:p5.properties"></property>
  </bean>

---

我需要知道如何将不同的属性值动态地注入到相同引用类型（具有相同属性名称）的不同bean中。我不想用XML硬编码它们。有什么java方法吗？请解释。

您可以使用Spring@Valuebean中的注释。创建的新实例时，Spring将为您填充属性值

public class Player
{
     @Value("${playerName}")
     private String playerName;
}

如果您希望坚持使用XML配置而不使用注释，请创建一个包含您的属性的bean，并将其连接到您的Player bean中

在PlayerProperty上使用scope=“prototype”为每个玩家创建一个实例。这样玩家就不会共享这些属性

使用scope=“singleton”（这是默认设置）让播放器实例共享PlayerProperties Bean

public class Player
{
    PlayerProperties props;
}

public class PlayerProperties
{
    String playerName;
    //getter,setter,...
}


<bean id = "player2" class="Player">
   <property name="props"  ref="playerProperties"></property>
   ...
</bean>


<bean id = "playerProperties" class="PlayerProperties" scope="prototype">
    <property name="playerName" value="${playrName}"></property>
    ...
</bean>

公共类播放器
{
玩家属性道具；
}
公共类PlayerProperty
{
弦乐演奏者姓名；
//getter，setter，。。。
}
...
...

应用程序类别：

@ComponentScan
@EnableAutoConfiguration
@EnableConfigurationProperties 
@EnableAsync
@EnableScheduling
@Configuration
@SpringBootApplication

//use players.properties
@PropertySource("classpath:players.properties") 
public class InstancePropsApp {

    public static void main(String[] args) {
        SpringApplication.run(InstancePropsApp.class, args);
    }

    //Create 3 Player Beans (could be done in XML-Config, too)
    @Bean Player player1() {return new Player();}
    @Bean Player player2() {return new Player();}
    @Bean Player player3() {return new Player();}

    @PostConstruct
    public void init()
    {
        //Output values after init. 
        player1().echoName();
        player2().echoName();
        player3().echoName();
    }

}

球员级别

@Component
@Scope("prototype")
//Make bean aware of it's name to use bean name as property prefix
public class Player implements BeanNameAware  {

    @Autowired
    private ConfigurableEnvironment environment;

    private String name;


    public void setName(String name) {
        this.name = name;
    }

    private String beanName;

    @PostConstruct
    public void init() {
        //init this beans properties from "beanName.xxx" values. e.g. 
        //player1.name and player2.name ans so on
        new RelaxedDataBinder(this, beanName).bind(new 
        PropertySourcesPropertyValues(environment.getPropertySources()));
    }

    //We use our very own bean name as prefix to load properties per
    //prototype instance
    public void setBeanName(String beanName) {
        this.beanName = beanName;
    }

    public void echoName()
    {
        System.out.println(beanName + " : " + name);
    }

}

players.properties：

player1.name=max
player2.name=theo
player3.name=karren

将打印

player1 : max
player2 : theo
player3 : karren

---

在给定的属性文件中，将存在唯一的属性=值对。对于给定的类，五个对象将具有相同的属性名（实例变量）。例如-'类OBJ obj1，obj2；obj1.name=“坟墓”；obj2.name=“zerobyzero””。问题是如何分别向obj1和obj2的name属性注入值？我不想用XML硬编码。建议我一些java方式或使用属性文件。