java 正则匹配

Question

{代码...} 请问这个正则为什么无法匹配. 脑子进猪油了,现在

PHPz · Answer

There is nothing wrong with your expression, you just need to adjust it firstm.find()再取m.group(1)

高洛峰 · Answer

    因为'\'和'"'(双引号)是需要要转义符的'\'的.像下面写就能行了.
    Pattern pattern = Pattern.compile("\"(\w+)\":\"(\w+)\"");
    Matcher m = pattern.matcher(""KEY":"VAL"");
    //m.group(1);
    if(m.find()){
        System.out.println(m.group(1));
    }