import java.util.ResourceBundle;import org.springframework.util.NumberUtils;/**读取资源文件的工具类.*/
public class ConfigUtil {/**读取资源文件里的键值信息.* 比如有键值名为a，其相应的值为整数类型，那么方法即为:readConfigForObject("a",Integer.class).* @param keyName 键值名* @param requiredType 返回数据类型* @return 指定的数据类型返回值或异常时返回null* @version v1.0.0*/@SuppressWarnings("unchecked")public static <T> T readConfigForObject(String keyName,Class<T> requiredType){try {ResourceBundle rb = ResourceBundle.getBundle("config");Object object = rb.getObject(keyName);return (T) convertValueToRequiredType(object,requiredType);} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}return null;}/**把指定的參数值转换成指定数据类型相应的值* @param value 待转换的參数值* @param requiredType 数据类型* @return 指定数据类型相应的值* @version v1.0.0*/@SuppressWarnings("unchecked")protected static Object convertValueToRequiredType(Object value, Class requiredType) {if (String.class.equals(requiredType)) {return value.toString();} else if (Number.class.isAssignableFrom(requiredType)) {if (value instanceof Number) {// Convert original Number to target Number class.return NumberUtils.convertNumberToTargetClass(((Number) value), requiredType);}else {// Convert stringified value to target Number class.return NumberUtils.parseNumber(value.toString(), requiredType);}} else if(Boolean.class.equals(requiredType)) {return Boolean.valueOf(value.toString());} else {throw new IllegalArgumentException("Value [" + value + "] is of type [" + value.getClass().getName() +"] and cannot be converted to required type [" + requiredType.getName() + "]");}}
}

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