接口 org.seimicrawler.xpath.core.Function
的使用

使用Function的程序包

程序包	说明
org.seimicrawler.xpath.core.function
org.seimicrawler.xpath.util

org.seimicrawler.xpath.core.function中Function的使用

实现Function的org.seimicrawler.xpath.core.function中的类

限定符和类型	类和说明
class	Concat Function: string concat(string, string, string*) The concat function returns the concatenation of its arguments.
class	Contains Function: boolean contains(string, string) The contains function returns true if the first argument string contains the second argument string, and otherwise returns false.
class	Count Function: number count(node-set) The count function returns the number of nodes in the argument node-set.
class	First first in xpath is 1
class	Last Function: number last() The last function returns a number equal to the context size from the expression evaluation context.
class	Not bool not(bool)
class	Position The position function returns a number equal to the context position from the expression evaluation context.
class	StartsWith Function: boolean starts-with(string, string) The starts-with function returns true if the first argument string starts with the second argument string, and otherwise returns false.
class	StringLength number string-length(string?)
class	SubString Function: string substring(string, number, number?)
class	SubStringAfter Function: string substring-after(string, string) The substring-after function returns the substring of the first argument string that follows the first occurrence of the second argument string in the first argument string, or the empty string if the first argument string does not contain the second argument string.
class	SubStringBefore Function: string substring-before(string, string) The substring-before function returns the substring of the first argument string that precedes the first occurrence of the second argument string in the first argument string, or the empty string if the first argument string does not contain the second argument string.
class	SubStringEx JsoupXpath扩展函数(统一使用 ‘jx’ 域)，保持使用习惯java开发者习惯相同，第一个数字为起始索引(且索引从0开始)，第二个数字为结束索引 StringUtils.substring(null, *, *) = null StringUtils.substring("", * , *) = ""; StringUtils.substring("abc", 0, 2) = "ab" StringUtils.substring("abc", 2, 0) = "" StringUtils.substring("abc", 2, 4) = "c" StringUtils.substring("abc", 2.13, 3.7) = "c" StringUtils.substring("abc", 4, 6) = "" StringUtils.substring("abc", 2, 2) = "" StringUtils.substring("abc", -2, -1) = "b" StringUtils.substring("abc", -4, 2) = "ab"

org.seimicrawler.xpath.util中Function的使用

返回Function的org.seimicrawler.xpath.util中的方法

限定符和类型	方法和说明
static Function	Scanner.findFunctionByName(java.lang.String funcName)