或许大家都常从属性文件中获得内容，但每次都写面向过程的那么多代码，这次写个工具类
以便以后可以重用代码，提高代码的效率
package com.xq.util;
import java.util.HashMap;
import java.util.Properties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class PropertiesUtils {
private static final Logger logger = LoggerFactory.getLogger(PropertiesUtils.class);
private static Properties properties;
private static HashMap<String, String> propertiesKeys = new HashMap<String,String>();
public static String getPropertyValue(String key) {
if (propertiesKeys.containsKey(key)) {
return propertiesKeys.get(key);
} else {
try {
properties = new Properties();
properties.load(Thread.currentThread().getContextClassLoader()
.getResourceAsStream("conf/setting.properties"));
String value = properties.getProperty(key);
propertiesKeys.put(key, value);
return value;
} catch (Exception e) {
logger.warn("read setting,properties error",e);
}
}
return null;
}
}