根据spring配置文件的 PropertiesFactoryBean和 PropertyPlaceholderConfigurer可以选择不同的加载方式，我是使用System.setProperty(key, value)，代码中可以直接用System.getProperty(key)取value的值
PropertyPlaceholderConfigurer是解决 properties 文件占位符问题，实现 PropertiesLoaderSupport 类
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> <value>classpath:redis.properties</value> </list> </property> <!-- 忽略不可解析的 --> <property name="ignoreUnresolvablePlaceholders" value="true" /> </bean>
package com.phil.common.prop;
import java.util.Map.Entry;
import java.util.Properties;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;
/**
* 加载Properties文件
* @author phil
* @date 2017年8月13日
*
*/
@Component
public class InitializingProperties implements InitializingBean {
private static final Logger logger = Logger.getLogger(InitializingProperties.class);
/*
* (non-Javadoc)
*
* @see
* org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
@Override
public void afterPropertiesSet() throws Exception {
Properties props = new Properties();
props.load(InitializingProperties.class.getClassLoader().getResourceAsStream("test1properties"));
props.load(InitializingProperties.class.getClassLoader().getResourceAsStream("test2.properties"));
for (Entry<Object, Object> e : props.entrySet()) {
System.setProperty(e.getKey().toString(), e.getValue().toString());
logger.info(e.getKey().toString() + "---" + e.getValue().toString());
}
}
}
PropertiesFactoryBean 是PropertiesLoaderSupport 直接的实现类
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="location"> <value>classpath:portal_dev.properties</value> </property> </bean>
package com.phil.common.prop;
import java.util.Map.Entry;
import java.util.Properties;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* 加载Properties文件
* @author phil
* @date 2017年8月13日
*
*/
@Component
public class InitializingProperties implements InitializingBean {
private static final Logger logger = Logger.getLogger(InitializingProperties.class);
@Autowired
private Properties propertyConfigurer;
/*
* (non-Javadoc)
*
* @see
* org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
@Override
public void afterPropertiesSet() throws Exception {
for (Entry<Object, Object> e : propertyConfigurer.entrySet()) {
System.setProperty(e.getKey().toString(), e.getValue().toString());
logger.info(e.getKey().toString() + "---" + e.getValue().toString());
}
}
}
原文：http://www.cnblogs.com/phil_jing/p/7355509.html