正则表达式：获取一串字符串中，某个字符串到某个字符串之间的字符串，不包含左右，只取中间

谁借莪１个温暖的怀抱￠ 2022-12-25 02:54 109阅读 0赞

# 表示取出"EventType":" 到 "之间的字符串，非贪婪匹配 #

(?<="EventType":").*?(?=")

# 如果后面"也换成字符串的话，就把?=换成?<=即可 #

例子如下：

public String getPattern(String str,String pattern){ 
            Pattern compile = Pattern.compile("(?<=\""+pattern+"\":\").*?(?=\")", Pattern.CASE_INSENSITIVE);
            Matcher matcher = compile.matcher(str);
            boolean b = matcher.find();
            if (b){ 
                return matcher.group(0);
            }else { 
                return "";
            }
        }

public static void main(String[] args) { 
            String str = "{\"Header\":{\"DcdGuid\":\"${#DCDGuid}\",\"DevGuid\":\"${#DevGuid}\",\"Sid\":\"${#Sid}\",\"Timestamp\":\"${#Timestamp}\"},\"Data\":{\"AppName\":\"\",\"EventType\":\"LoginOper\",\"FunClassTag\":\"Login\",\"FunClassValue\":\"failure\",\"DiscoverTime\":\"${#RealTime}\",\"Details\":{\"LoginType\":\"-\",\"LoginSourceIp\":\"${1.3.6.1.4.1.2011.5.25.207.1.2.1.1.2.34}\",\"User\":\"${1.3.6.1.4.1.2011.5.25.207.1.2.1.1.4.34}\",\"Password\":\"-\"}}}";
            test test = new test();
            String eventType = test.getPattern(str,"EventType");
            String funClassTag = test.getPattern(str,"FunClassTag");
            String funClassValue = test.getPattern(str,"FunClassValue");
            System.out.println(eventType);
            System.out.println(funClassTag);
            System.out.println(funClassValue);
        }