springmvc 如何读取properties文件中的值

Question

springmvc 如何读取properties文件中的值

Answer 1

<context:property-placeholder location="classpath:jdbc.properties" />

Answer 2

首先指定好：

<bean id="propertyConfigurer"

  class="com.ruishengtech.framework.core.SpringPropertiesUtil" lazy-init="false">
<property name="locations">
    <list>
        <value>classpath:config/sys.properties</value>
    </list>
</property>

</bean>

在提供一个工具类吧（package自定导入下，应该没问题的。）：

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

public class SpringPropertiesUtil extends PropertyPlaceholderConfigurer {

    private static Map<String, String> propertiesMap;
    // Default as in PropertyPlaceholderConfigurer
    private int springSystemPropertiesMode = SYSTEM_PROPERTIES_MODE_FALLBACK;

    @Override
    public void setSystemPropertiesMode(int systemPropertiesMode) {
        super.setSystemPropertiesMode(systemPropertiesMode);
        springSystemPropertiesMode = systemPropertiesMode;
    }

    @Override
    protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props) throws BeansException {
        super.processProperties(beanFactory, props);

        propertiesMap = new HashMap<String, String>();
        for (Object key : props.keySet()) {
            String keyStr = key.toString();
            String valueStr = resolvePlaceholder(keyStr, props, springSystemPropertiesMode);
            propertiesMap.put(keyStr, valueStr);
        }
    }
    public static String getProperty(String name) {
        return propertiesMap.get(name).toString();
    }

}