[英]Regex problem in Java in code sample
I have job with regex in my expressions: example !(FA1_A.i & FA1_M.i)
我在表达式中处理了正则表达式:示例
!(FA1_A.i & FA1_M.i)
I have operators: ! ( ) & |
我有运营商:
! ( ) & |
! ( ) & |
The operands have names: [a-zA-Z_]*\\.[a-zA-Z_]
操作数的名称为:
[a-zA-Z_]*\\.[a-zA-Z_]
I wrote Java code to split on tokens, but it doesn't split on operators and operands. 我编写了Java代码以拆分标记,但没有拆分运算符和操作数。 It should be !, (, FA1_A.i, &, FA1_m.i, ) .
它应该是!,(,FA1_A.i,&,FA1_m.i,)。 Can anybody tell me what is wrong?
谁能告诉我哪里出了问题?
String stringOpеrator = "([!|&()])";
String stringOperand = "(([a-zA-Z_]*)\\.([a-zA-Z_]*))";
String reg=stringOpеrator+"|"+stringOperand;
Pattern pattern = Pattern.compile(reg);
Matcher m = pattern.matcher(expression);
// System.out.println("func: " + function + " item: " + item);
while (m.find()) {
int a=m.start();
int b=m.end();
String test=expression.substring(m.start(), m.end());
String g=test;
tokens.add(new Token(expression.substring(m.start() , m.end())));
//m = pattern.matcher(expression);
}
您提供的示例中的名称似乎包含数字,您的正则表达式不匹配。
You have to change following code 您必须更改以下代码
String stringOperand = "(([a-zA-Z_]*)\\.([a-zA-Z_]*))";
TO 至
String stringOperand = "(([a-zA-Z_0-9]*)\\.([a-zA-Z_0-9]*))";
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