这个错误是findbugs插件找出来的问题.
代码首先是这样的
public static List<InvoiceDTO> getKeyInvoiceOpeningResList(
String key) {
List<InvoiceDTO> list = invoiceOpeningListMap.get(key);
if (list == null) {
list = new ArrayList<InvoiceDTO>();
invoiceOpeningListMap.put(key, list);
}
return list;
} public s
