Question

对于规则

a==b&c>=d|e<=f&!x==y

我想使用＆amp;，|，＆amp;！来拆分规则operator andt也想存储运算符。

所以我想存储：

a==b
&
c>=d
|
e<=f
&!
x==y

还应该将它存储在字符串数组中吗？

感谢。

Answer 1

试试这种方式

String data = "a==b&c>=d|e<=f&!x==y";

Pattern p = Pattern.compile(
        "&!"+  // &! 
        "|" +  // OR 
        "&" +  // & 
        "|" +  // OR
        "\\|"  // since | in regex is OR we need to use to backslashes 
               // before it -> \\| to turn off its special meaning
        );
StringBuffer sb = new StringBuffer();
Matcher m = p.matcher(data);
while(m.find()){
    m.appendReplacement(sb, "\n"+m.group()+"\n");
}
m.appendTail(sb);
System.out.println(sb);

输出

a==b
&
c>=d
|
e<=f
&!
x==y

Answer 2

这个正则表达式做你想要的......

    final String input = "a==b&c>=d|e<=f&!x==y";

    //this regex will yield pairs of one string followed by operator (&, | or &!)...
    final String mainRegex = "(.*?)(&!|&|\\|)";

    final Matcher matcher = Pattern.compile(mainRegex).matcher(input);

    while (matcher.find()) {
        System.out.println(matcher.group(1));
        System.out.println(matcher.group(2));
    }

    //...so we will need another regex to fetch what comes after the last operator
    final String lastOne = "(.*)(&|\\||!)(.*)";
    final Matcher lastOneMatcher = Pattern.compile(lastOne).matcher(input);

    if (lastOneMatcher.find()) {
        System.out.println(lastOneMatcher.group(3));
    }

结果：

    a==b
    &
    c>=d
    |
    e<=f
    &!
    x==y

如何在java中存储键值和分隔符

2 个答案: