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"/>
	方法一
    <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;
    }

}
jdbc.driverClassName=org.hsqldb.jdbcDriver

  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;
    }

}
driverClassName=org.hsqldb.jdbcDriver

--------------------------------------------------------------------------------------------------- 一、只读取单个 properties 文件

1、在 spring 的配置文件中，加入

引入命名空间：

xmlns:util=”http://www.springframework.org/schema/util”
xsi:schemaLocation=”http://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util-3.0.xsd”

 内容中写入<util:properties id=”propertiesReader” location=”classpath:test.properties” />

2、在类中需要注入的属性实现 setter 和 getter 方法。

3、在 setter 方法前，添加 @Value 注解

@Value(“#{propertiesReader[propertiesName]}”)

propertiesName 为 properties 文件中的键。这样，在容器启动过程中， Spring 将自动注入值。

二、读取多个 properties 文件与上类似，只是在配置文件写入的内容不同。

<bean id=”propertiesReader”
class=”org.springframework.beans.factory.config.PropertiesFactoryBean”>
	<property name=”locations”>
	   <list>
			<value>classpath:param.properties</value>
			<value>classpath:base.properties</value>
		</list>
	</property>
</bean>