XPath实例教程

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1、XPath实例教程一、基本的XPath语法基本的XPath语法类似于在一个文件系统中定位文件,如果路径以斜线/开始,那么该路径就表示到一个元素的绝对路径/AAA选择根元素AAA                                                                                                /AAA/CCC选择AAA的所有CCC子元素                        

2、                                                                        /AAA/DDD/BBB选择AAA的子元素DDD的所有子元素                                                                                               

3、AA>XPath实例教程二、以双斜线//开头查询如果路径以双斜线//开头,则表示选择文档中所有满足双斜线//之后规则的元素(无论层级关系)//BBB选择所有BBB元素                                                                                                                                                      

4、D>                //DDD/BBB选择所有父元素是DDD的BBB元素                                                                                                                                                                     

5、A>XPath实例教程三、星号*表示选择所有由星号之前的路径所定位的元素/AAA/CCC/DDD/*选择所有路径依附于/AAA/CCC/DDD的元素                                                                                                                                                                    

6、                                                                                                                                                                                                                             

7、AA> /*/*/*/BBB选择所有的有3个祖先元素的BBB元素