/**
* 转换字符串到相应类型.
*
* @param value 待转换的字符串.
* @param toType 转换目标类型.
*/
public static Object convertStringToObject(String value, Class<?> toType) {
try {
return org.apache.commons.beanutils.ConvertUtils.convert(value, toType);
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
}
/**
* 提取集合中的对象的一个属性(通过Getter函数), 组合成List.
*
* @param collection 来源集合.
* @param propertyName 要提取的属性名.
*/
public static List extractToList(final Collection collection, final String propertyName) {
List list = new ArrayList(collection.size());
try {
for (Object obj : collection) {
list.add(PropertyUtils.getProperty(obj, propertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return list;
}
/**
* 提取集合中的对象的属性(通过getter函数), 组合成List.
*
* @param collection 来源集合.
* @param propertyName 要提取的属性名.
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public static List convertElementPropertyToList(
final Collection collection, final String propertyName) {
List list = new ArrayList();
try {
for (Object obj : collection) {
list.add(PropertyUtils.getProperty(obj, propertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return list;
}
/**
* 提取集合中的对象的两个属性(通过Getter函数), 组合成Map.
*
* @param collection 来源集合.
* @param keyPropertyName 要提取为Map中的Key值的属性名.
* @param valuePropertyName 要提取为Map中的Value值的属性名.
*/
public static Map extractToMap(
final Collection collection, final String keyPropertyName, final String valuePropertyName) {
Map map = new HashMap(collection.size());
try {
for (Object obj : collection) {
map.put(
PropertyUtils.getProperty(obj, keyPropertyName),
PropertyUtils.getProperty(obj, valuePropertyName));
}
} catch (Exception e) {
throw Reflections.convertReflectionExceptionToUnchecked(e);
}
return map;
}
