属性文件操作类PropertiesReader

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源代码：

/* * Description: PropertiesReader.java * Copyright belongs to the original author or authors. */package com.zuche.framework.utils;import java.io.InputStream;import java.util.Map;import java.util.Properties;import java.util.concurrent.ConcurrentHashMap;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * Properties文件读取器； * Properties文件必须存在class根目录下 * @since 1.0 */public final class PropertiesReader {    private static final Logger CLASS_LOGGER = LoggerFactory.getLogger(PropertiesReader.class);    //缓存properties文件    private static Map<String, Properties> propertiesMap = new ConcurrentHashMap<String, Properties>();    //默认property配置文件后缀    private static final String DEFAULT="_default";    //缓存有序properties文件    private static Map<String, OrderProperties> orderPropertiesMap = new ConcurrentHashMap<String, OrderProperties>();        private PropertiesReader(){}    /**     * 获取指定的properties 中 指定的属性     * @since 1.0     * @param propertiesName     * @param attributeName     * @param clazz，返回的类型（Integer.class,Boolean.class,String.class,Long.class），只支持此四种类型     * @return     */    public static<T> T getAppointPropertiesAttribute(String propertiesName,String attributeName,Class<T> clazz){        Assert.notNull(clazz, "获取指定类型“clazz”参数为null !");        Assert.isExist(new Object[]{Integer.class,Boolean.class,String.class,Long.class,Double.class}, clazz, "参数“clazz” 类型不在指定的类型中！");        Properties ps = getProperties(propertiesName);    return getAppointPropertiesAttribute(ps, attributeName, clazz);    }        /**     * 获取指定的properties 中 指定的属性     * @since 3.2.9     * @param ps     * @param attributeName     * @param clazz，返回的类型（Integer.class,Boolean.class,String.class,Long.class），只支持此四种类型     * @return     */    public static<T> T getAppointPropertiesAttribute(Properties ps,String attributeName,Class<T> clazz){        Assert.notNull(clazz, "获取指定类型“clazz”参数为null !");        Assert.isExist(new Object[]{Integer.class,Boolean.class,String.class,Long.class,Double.class}, clazz, "参数“clazz” 类型不在指定的类型中！");    if(ps != null){    String value = ps.getProperty(attributeName);    if(value == null || "".equals(value)){    return null;    }        if(clazz == Boolean.class){    return clazz.cast(Boolean.parseBoolean(value));    }else if(clazz == Integer.class){    return clazz.cast(Integer.parseInt(value));    }else if(clazz == Long.class){    return clazz.cast(Long.parseLong(value));    }else if(clazz == Double.class){    return clazz.cast(Double.parseDouble(value));    }else{    return clazz.cast(value);    }        }    return null;    }    /**     * 根据参数创建Properties对象     * @since 1.0      * @param propertiesName     * @return     */    public static Properties getProperties(String propertiesName) {           return getProperties(propertiesName, true);        }        /**     * 根据参数创建Properties对象     * @since 1.0      * @param propertiesName 资源文件名(资源文件必须存在class根目录下)     * @param isCache 是否缓存配置的对象(lhb)     * @return Properties对象     */public static Properties getProperties(String propertiesName,boolean isCache) {Properties resultProperties = propertiesMap.get(propertiesName);// 缓存没有，重新读取并存入缓存if (resultProperties == null) {Properties defaultProp = createProperties(propertiesName + DEFAULT); // 获取默认property文件resultProperties = createProperties(propertiesName);if (defaultProp != null && resultProperties != null) {resultProperties.putAll(defaultProp);}else if(defaultProp != null){resultProperties = defaultProp ;}if (isCache) {if(resultProperties != null){propertiesMap.put(propertiesName, resultProperties);}}}return resultProperties;}    /**     * 根据参数创建Properties对象,获取的properties为有序的     * @since 1.0      * @param propertiesName 资源文件名(资源文件必须存在class根目录下)     * @return Properties对象     */    public static OrderProperties getOrderProperties(String propertiesName) {        OrderProperties resultProperties = orderPropertiesMap.get(propertiesName);        //缓存没有，重新读取并存入缓存        if (resultProperties == null) {                OrderProperties defaultProp = createOrderProperties(propertiesName + DEFAULT); // 获取默认property文件         resultProperties = createOrderProperties(propertiesName);if (defaultProp != null && resultProperties != null) {resultProperties.putAll(defaultProp);}else if(defaultProp != null){resultProperties = defaultProp ;}                           if(resultProperties != null){           orderPropertiesMap.put(propertiesName, resultProperties);           }        }        return resultProperties;    }    private static Properties createProperties(String propertiesName) {        InputStream fis = null;        Properties properties = null;        try {            fis = PropertiesReader.class.getResourceAsStream("/" + propertiesName + ".properties");            if (fis != null) {                properties = new Properties();                properties.load(fis);                fis.close();            }        } catch (Exception e) {        CLASS_LOGGER.error(e.getMessage(),e);            fis = null;        }        return properties;    }    private static OrderProperties createOrderProperties(String propertiesName) {        InputStream fis = null;        OrderProperties properties = null;        try {            fis = PropertiesReader.class.getResourceAsStream("/" + propertiesName + ".properties");            if (fis != null) {                properties = new OrderProperties();                properties.load(fis);                fis.close();            }        } catch (Exception e) {        CLASS_LOGGER.error(e.getMessage(),e);            fis = null;        }        return properties;    }}

调用示例：

private static boolean switching(String name,boolean defaultValue){Boolean isSwitch = PropertiesReader.getAppointPropertiesAttribute("switch", name, Boolean.class);if(isSwitch == null){return defaultValue;}else{return isSwitch;}}

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