针对config.properties的配置文件读取的工具类

布满荆棘的人生 2022-06-09 00:28 66阅读 0赞

针对config.properties的配置文件读取的工具类  
拥有  
`getProperty(String key, String defaultValue)`

`getProperty(String key)`

package com.guxiang.utils;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Properties;
    
    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    /** * * 针对config.properties的配置文件读取类 * */
    public final class ConfigurableConstants { 
        private static Log loger = LogFactory.getLog(ConfigurableConstants.class);
    
        private static Properties config_pro = new Properties();
    
        private static String propertyFileName = "config/config.properties";
        /** * 静态读入属性文件到Properties p变量中 */
        static {
            loger.debug("初始化配置文件" + propertyFileName + "到 Constants....");
            InputStream in = null;
            try {
                in = ConfigurableConstants.class.getClassLoader()
                        .getResourceAsStream(propertyFileName);
                if (in != null) {
                    config_pro.load(in);
                }
            } catch (IOException e) {
                loger.error("初始化配置文件 " + propertyFileName
                 + " 到 Constants 发生错误,请检查相关配置文件!" + e);
            } finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                         loger.error("close " + propertyFileName + " error!");
                    }
                }
            }
        }
        /** * * 封装了Properties类的getProperty函数,使p变量对子类透明. * * @param key * property key. * @param defaultValue * 当使用property key在properties中取不到值时的默认值. * @return 属性值 */
        public static String getProperty(String key, String defaultValue) {
            if (config_pro.getProperty(key)== null) {
                return defaultValue;
                }else{
                    return config_pro.getProperty(key);
                }
    
        }
    
        /** * * 封装了Properties类的getProperty函数,使p变量对子类透明. * * @param key * property key. * @return 属性值 */
        public static String getProperty(String key) {
            return getProperty(key, null);
        }
    }