📅 最后修改于: 2020-12-26 06:59:10 🧑 作者: Mango
XPath在节点上定义运算符和函数。 XPath表达式返回节点集，字符串，布尔值或数字。
XPath表达式中使用的运算符列表：
| Operator | Description |
|---|---|
| | | It is used to computes two node-sets. |
| + | Addition Operator |
| – | Subtraction Operator |
| * | Multiplication Operator |
| div | Division Operator |
| = | Equal Operator |
| != | Not Equal Operator |
| < | Less than Operator |
| <= | Less than or Equal to Operator |
| > | Greater than Operator |
| >= | Greater than or Equal to Operator |
| or | Or Operator |
| and | And Operator |
| mod | Modulus (Division Remainder) |
XPath运算符可以根据其属性分为不同的类别。以下是不同类型的XPath运算符：
| Index | Operators/Functions | Description |
|---|---|---|
| 1) | Comparison Operators | Comparison operators are used to compare values. |
| 2) | Boolean Operators | Boolean operators are used to check ‘and’, ‘or’ & ‘not’ functionalities. |
| 3) | Number Functions/Operators | Operators/Functions on Numbers. |
| 4) | String Functions | It specifies various string functions. |
| 5) | Node Functions/Operators | It specifies various functions and operators acting on nodes. |