面试题积累-Spring-如何向 Spring Bean 中注入一个 Java.util.Properties？

拼搏现实的明天。 2023-07-13 15:08 21阅读 0赞

<beans  xmlns="http://www.springframework.org/schema/beans" 
    		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    		xmlns:p="http://www.springframework.org/schema/p" 
    		xmlns:util="http://www.springframework.org/schema/util" 
    		xmlns:context="http://www.springframework.org/schema/context"
    		xsi:schemaLocation="http://www.springframework.org/schema/beans 
    							http://www.springframework.org/schema/beans/spring-beans.xsd
    							http://www.springframework.org/schema/context 
    							http://www.springframework.org/schema/context/spring-context.xsd
    							http://www.springframework.org/schema/util 
    							http://www.springframework.org/schema/util/spring-util.xsd">
     
    	<bean id="propertiesInjectBean1" class="com.doctor.spring.context.inject.PropertiesInjectBean1">
    		<property name="properties">
    			<value>
    				name=doctor
    				sex=man
    				address=alien
    			</value>
    		</property>
    	</bean>
    	<bean id="propertiesInjectBean2" class="com.doctor.spring.context.inject.PropertiesInjectBean2">
    		<property name="properties">
    			<props>
    				<prop key="name">doctor</prop>
    				<prop key="address">alien</prop>
    			</props>
    		</property>
    	</bean>
     
    </beans>

类如下：

package com.doctor.spring.context.inject;
    import java.util.Properties;
    public class PropertiesInjectBean1 { 
    	private Properties properties;
     
    	public Properties getProperties() { 
    		return properties;
    	}
     
    	public void setProperties(Properties properties) { 
    		this.properties = properties;
    	}
    	
    	
    }

package com.doctor.spring.context.inject;
     
    import java.util.Properties;
     
     
    public class PropertiesInjectBean2 { 
     
    	private Properties properties;
     
    	public Properties getProperties() { 
    		return properties;
    	}
     
    	public void setProperties(Properties properties) { 
    		this.properties = properties;
    	}
    }

启动容器：

package com.doctor.spring.context.inject;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    public class PropertiesInjectPractice { 
    	public static void main(String[] args) { 
    		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:/injectValueIntoBeanPropertiesPractice/propertiesInjectPracticeConfigurer.xml");
    		PropertiesInjectBean1 injectBean1 = context.getBean(PropertiesInjectBean1.class);
    		System.out.println(injectBean1.getProperties());
    		PropertiesInjectBean2 injectBean2 = context.getBean(PropertiesInjectBean2.class);
    		System.out.println(injectBean2.getProperties());
    		context.close();
    	}
    }

输出：  
\{address=alien, name=doctor, sex=man\}  
\{address=alien, name=doctor\}

**也可用”util:”命名空间来从 properties 文件中创建出一个 propertiesbean，然后利用 setter 方 法注入 bean 的引用。**

原文链接：https://blog.csdn.net/doctor\_who2004/article/details/42617429