name方式name=wd//不要引号id方式id=kw//不要引号xpath绝对路径Xpath = /html/body/div[1]/div[4]/div[2]/div/form/span[1]/input//不推荐，一旦路径稍做改动，就会报错相对路径xpath=//*[@id="su"]xpath=//*[@id="su" and @value="百度一下"]//逻辑关系查找xpath=//