【转】spring中props,list,set,map元素的用法

在spring容器中配置bean，常用到的元素除了<value>和<ref>外，还有<props>、<list>、<set>、<map>，在hibernate等框架的配置文件中我们经常可以见到这些元素，下面是他们的具体用法。

1.<props>元素
<props>创建了一个注入的java.util.Properties元素。例如每个人都有身高、体重等基本信息

1 import java.util.Properties;
2 
3 public class Person {
4     private Properties basicInfo;
5 
6     public void setBasicInfo(Properties basicInfo) {
7         this.basicInfo = basicInfo;
8      }
9 }

配置方式：

1 <bean id="person" class="Person">
2         <property name="basicInfo">
3             <props>
4                 <!-- 身高 -->
5                 <prop key="stature">1.75</prop>
6                 <!-- 体重 -->
7                 <prop key="avoirdupois">120</prop>
8             </props>
9         </property>
10     </bean>

2.<list>元素
<list>元素对应于java.util.ArrayList.例如每个人都有一些朋友

1 package org.hag.flex.model;
2 
3 import java.util.List;
4 import java.util.Properties;
5 
6 public class Person {
7     private Properties basicInfo;
8     private List friends;
9 
10     public void setBasicInfo(Properties basicInfo) {
11         this.basicInfo = basicInfo;
12      }
13 
14     public void setFriends(List friends) {
15         this.friends = friends;
16      }
17 }
18

配置该person的朋友有小红、姚明和张三

1 <bean id="yaoming" class="Person">
2         <prop key="age">25</prop>
3         <prop key="stature">2.26</prop>
4         <prop key="avoirdupois">140</prop>
5 </bean>
6 <bean id="person" class="Person">
7         <property name="basicInfo">
8             <props>
9                 <!-- 身高 -->
10                 <prop key="stature">1.75</prop>
11                 <!-- 体重 -->
12                 <prop key="avoirdupois">120</prop>
13             </props>
14         </property>
15         <property name="firends">
16             <list>
17                 <value>xiaohong</value>
18                 <ref local="yaoming"/>
19                 <value>zhangsan</value>
20             </list>
21         </property>
22 </bean>

3.<set>元素
<set>元素和<list>元素的用法一样，不同的是他注入的是java.util.Set元素。
4.<map>元素
<map>元素用来注入java.util.Map元素。

1 <property name="score">
2             <map>
3                 <entry key="math" value="150"></entry>
4                 <entry key="english" value="140"></entry>
5                 <entry key="chinese" value="60"></entry>
6             </map>
7 </property>

4、spring配置里map的value是list配法

<map>
            <entry key="a">
               <list>
                  <ref bean="b"/>
                  <ref bean="c"/>
               </list> 
            </entry>
            <entry key="d">
               <list>
                  <ref bean="e"/>
               </list>
            </entry>
 </map>

4、<!-- 外部配置文件 -->

<!-- 加载jdbc属性文件 -->
<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
	<property name="locations">
		<list>
			<value>classpath*:config.properties</value>
		</list>
	</property>
</bean>

<!-- 外部配置文件 -->
<context:property-placeholder location="classpath*:application.properties" />

<!--定义全局连接命名变量 -->
<util:properties id="posmqProperties" location="classpath:/jms/pos-mq-jndi.properties" />	

5、查找jndi的方式

<bean id="jmsConnectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean">
		<property name="jndiName">
			<value>java:comp/env/jms/name</value>
		</property>
</bean>

<!--  MQ 连接工厂 -->
<jee:jndi-lookup id="posMqConnectionFactory" jndi-name="jms/posmq" environment-ref="posmqProperties" />
<!--定义全局连接命名变量 -->
<util:properties id="posmqProperties" location="classpath:/jms/pos-mq-jndi.properties" />	

<!-- Jndi --> 
<bean id="jndiTemplate" 
class="org.springframework.jndi.JndiTemplate"> 
<property name="environment"> 
<props> 
<prop key="java.naming.factory.initial"> 
weblogic.jndi.WLInitialContextFactory 
</prop> 
<prop key="java.naming.provider.url"> 
t3://192.166.68.44:7001 
</prop> 
<prop key="java.naming.factory.url.pkgs"> 
weblogic.jndi.factories 
</prop> 
</props> 
</property> 
</bean> 

<!-- jms sender --> 
<bean id="jmsConnectionFactory" 
class="org.springframework.jndi.JndiObjectFactoryBean"> 
<property name="jndiTemplate" ref="jndiTemplate" /> 
<property name="jndiName" value="ConnectionFactory" /> 
</bean> 
<bean id="jmsQueue" 
class="org.springframework.jndi.JndiObjectFactoryBean"> 
<property name="jndiTemplate" ref="jndiTemplate"></property> 
<property name="jndiName" value="Queue"></property> 
</bean> 

<!-- jms template --> 
<bean id="jmsTemplate" 
class="org.springframework.jms.core.JmsTemplate"> 
<property name="connectionFactory" ref="jmsConnectionFactory"></property> 
<property name="defaultDestination" ref="jmsQueue"></property> 
</bean>

 


6、Spring 在配置中使用*.properties

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/util 
            http://www.springframework.org/schema/util/spring-util-3.0.xsd">
    <context:annotation-config/>
    <!-- picks up and registers AppConfig as a bean definition -->
    <context:component-scan base-package="com.web.spring.other" />
    
    <bean class="com.web.spring.other.AppConfig"/>
	访法一
    <context:property-placeholder location="classpath:jdbc.properties" />
    	方法二
    <util:properties id="jdbcProperties" location="classpath:jdbc.properties"/>
</beans>

实现一：
package com.web.spring.other;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;

@Configuration
@ImportResource("classpath*:spring/spring-properties.xml")
public class AppConfig {
    private @Value("${jdbc.driverClassName}") String driverClassName;
    @Bean(initMethod = "init")
    public JDBCBean jdbc(){
        JDBCBean jdbc=new JDBCBean();
        jdbc.setDriverClassName(driverClassName);
        return jdbc;
    }

}

实现二：
package com.web.spring.other;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfig {
    private @Value("#{jdbcProperties.driverClassName}") String driverClassName;
    //private @Value("#{jdbcProperties['jdbc.driverClassName']}") String driverClassName;
    @Bean(initMethod = "init")
    public JDBCBean jdbc(){
        JDBCBean jdbc=new JDBCBean();
        jdbc.setDriverClassName(driverClassName);
        return jdbc;
    }

}