DOM的优势主要表现在:易用性强,使用DOM时,将把所有的XML文档信息都存于内存中,并且遍历简单,支持XPath,增强了易用性。 DOM的缺点主要表现在:效率低,解析速度慢,内存占用量过高,对于大文件来说几乎不可能使用-DOM advantage of the main problems: ease-of-use, and the use of DOM, the XML document will all the information are stored in memory, and easy traversal, support for XPath, enhanced ease of use. DOM disadvantage of the main problems: inefficient, slow to resolve, memory usage is too high, for example large files almost impossible to use