org.snaker.engine.helper.ConfigHelper Maven / Gradle / Ivy
/* Copyright 2013-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.snaker.engine.helper;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.apache.commons.lang.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 配置属性帮助类
* @author yuqs
* @version 1.0
*/
public class ConfigHelper
{
private static final transient Logger log = LoggerFactory.getLogger(ConfigHelper.class);
/**
* 常用配置属性文件名称.
*/
private final static String PROPERTIES_FILENAME = "snaker.properties";
/**
* 配置属性对象静态化
*/
private static Properties properties;
public static Properties getProperties() {
if(properties == null) {
synchronized (ConfigHelper.class) {
if(properties == null) {
loadProperties(PROPERTIES_FILENAME);
}
}
}
return properties;
}
/**
* 根据key获取配置的字符串value值
* @param key
* @return
*/
public static String getProperty(String key) {
if (key == null) {
return null;
}
return getProperties().getProperty(key);
}
/**
* 根据key获取配置的数字value值
* @param key
* @return
*/
public static int getNumerProperty(String key) {
String value = getProperties().getProperty(key);
if(NumberUtils.isNumber(value)) {
return Integer.parseInt(value);
} else {
return 0;
}
}
public static void loadProperties(Properties props) {
properties = props;
}
/**
* 根据指定的文件名称，从类路径中加载属性文件，构造Properties对象
* @param filename 属性文件名称
*/
public static void loadProperties(String filename) {
InputStream in = null;
ClassLoader threadContextClassLoader = Thread.currentThread().getContextClassLoader();
properties = new Properties();
if (threadContextClassLoader != null) {
in = threadContextClassLoader.getResourceAsStream(filename);
}
if (in == null) {
in = ConfigHelper.class.getResourceAsStream(filename);
if (in == null) {
log.warn("No properties file found in the classpath by filename " + filename);
}
} else {
try {
properties.load(in);
log.info("Properties read " + properties);
} catch (Exception e) {
log.error("Error reading from " + filename, e);
} finally {
try {
in.close();
} catch (IOException e) {
log.warn("IOException while closing InputStream: " + e.getMessage());
}
}
}
}
}