java - XmlMapper 在解析 LinkedHashMap 时缺少根

Question

public static void main(String[] args) throws IOException {
    XmlMapper xmlMapper = new XmlMapper();
    LinkedHashMap result = xmlMapper.readValue("<root><a>1</a><b>2</b></root>", LinkedHashMap.class);
    System.out.println(result);
}

它返回:

{a=1, b=2}

如何让它保持像这样的根元素:

{
   root = { 
      a = 1, 
      b = 2
   }
}

Answer 1

请考虑为此用例创建一个真正的 POJO，因为 map 为 not supported for root elements .