DOM解析将会把一个完整的XML文档读进来，生成一个结构树。这样会要把XML文档全部都加载到内存中。所以解析起来的速度会要慢一些。-DOM parsing will be a complete XML document to read in, generate a tree. This will make all XML documents loaded into memory. So, speed up analysis slower.

HTML.dom树，获取网页中元素，还有密码-HTML.dom tree, access web password

根据给出的链接地址，获取DOM树，根据树，活的每个元素，从而抓取到web网页的内容-According to the given URL, obtain the DOM tree, the tree, each element of living, which captures the web Webpage content