!80 更改为泛型，方便使用

Merge pull request !80 from 时光岁月童年/v5-dev

hutool-setting/src/main/java/cn/hutool/setting/AbsSetting.java

@@ -261,7 +261,7 @@ public abstract class AbsSetting extends OptNullBasicTypeFromStringGetter<String
 	 * @param bean Bean对象
 	 * @return Bean
 	 */
-	public Object toBean(final String group, Object bean) {
+	public <T> T toBean(final String group, T bean) {
 		return BeanUtil.fillBean(bean, new ValueProvider<String>(){
 
 			@Override
@@ -283,7 +283,7 @@ public abstract class AbsSetting extends OptNullBasicTypeFromStringGetter<String
 	 * @param bean Bean
 	 * @return Bean
 	 */
-	public Object toBean(Object bean) {
+	public <T> T toBean(T bean) {
 		return toBean(null, bean);
 	}
 }