老毕将正则的时候有一个练习是对ip地址串内的ip地址进行排序的
下面是我写的代码对ip段进行位数对齐的,但是结果有问题-
- String str = "192.168.0.1 10.10.10.10 2.2.2.2 255.255.255.255";
- str = str.replaceAll("(\\D)(\\d{1})(\\D)","$100$2$3");
- //str = str.replaceAll("(\\D+)(\\d{1})(\\D+)","$100$2$3");
- System.out.println(str);
- str = str.replaceAll("(\\D)(\\d{2})(\\D)","$10$2$3");
- //str = str.replaceAll("(\\D)(\\d{2})(\\D)","$10$2$3");
- System.out.println(str);
复制代码 结果替换的不全,比如第一次替换只有一位的的段,结果2.2.2.2只变成了002.2.002.2,再加一次替换才会变成002.002.002.002,替换两位的也是这种情况,这是为什么。求高人指点
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