用正则表达式创建模板

Question

我想用正则表达式在openvswitch.log上创建一个模板。我有openvswitch.log喜欢跟随文本；

2017-05-18T06:40:02.850Z|00010|ofproto_dpif|INFO|system@ovs-system: Datapath supports recirculation
2017-05-18T06:40:02.850Z|00011|ofproto_dpif|INFO|system@ovs-system: MPLS label stack length probed as 1
2017-05-18T06:40:02.850Z|00012|ofproto_dpif|INFO|system@ovs-system: Datapath supports truncate action
2017-05-18T06:40:02.850Z|00013|ofproto_dpif|INFO|system@ovs-system: Datapath supports unique flow ids
2017-05-18T06:40:02.850Z|00014|ofproto_dpif|INFO|system@ovs-system: Datapath supports ct_state
2017-05-18T06:40:02.850Z|00015|ofproto_dpif|INFO|system@ovs-system: Datapath supports ct_zone
2017-05-18T06:40:02.850Z|00016|ofproto_dpif|INFO|system@ovs-system: Datapath supports ct_mark
2017-05-18T06:40:02.850Z|00017|ofproto_dpif|INFO|system@ovs-system: Datapath supports ct_label
2017-05-18T06:40:02.850Z|00018|ofproto_dpif|INFO|system@ovs-system: Datapath supports ct_state_nat
2017-05-18T06:40:02.861Z|00001|ofproto_dpif_upcall(handler1)|INFO|received packet on unassociated datapath port 0
2017-05-18T06:40:02.861Z|00019|bridge|INFO|bridge s1: added interface s1-eth2 on port 2
2017-05-18T06:40:02.862Z|00020|bridge|INFO|bridge s1: added interface s1-eth1 on port 1
2017-05-18T06:40:02.862Z|00021|bridge|INFO|bridge s1: added interface s1-eth3 on port 3
2017-05-18T06:40:02.865Z|00022|bridge|INFO|bridge s1: added interface s1 on port 65534
2017-05-18T06:40:02.865Z|00023|bridge|INFO|bridge s2: added interface s2-eth3 on port 3
2017-05-18T06:40:02.869Z|00024|bridge|INFO|bridge s2: added interface s2-eth2 on port 2
2017-05-18T06:40:02.869Z|00025|bridge|INFO|bridge s2: added interface s2-eth1 on port 1
2017-05-18T06:40:02.873Z|00026|bridge|INFO|bridge s2: added interface s2 on port 65534
2017-05-18T06:40:02.873Z|00027|bridge|INFO|bridge s1: using datapath ID 0000000000000001
2017-05-18T06:40:02.873Z|00028|connmgr|INFO|s1: added service controller "punix:/var/run/openvswitch/s1.mgmt"
2017-05-18T06:40:02.873Z|00029|connmgr|INFO|s1: added service controller "ptcp:6654"
2017-05-18T06:40:02.873Z|00030|connmgr|INFO|s1: added primary controller "tcp:192.168.29.87:6633"
2017-05-18T06:40:02.873Z|00031|rconn|INFO|s1<->tcp:192.168.29.87:6633: connecting...
2017-05-18T06:40:02.877Z|00032|bridge|INFO|bridge s2: using datapath ID 0000000000000002

例如；

桥s1:在端口上添加了s1-eth2接口

我想搜索“桥接.增加了接口.在端口上.”如何使用正则表达式找到这个模板？我将使用java语言

我写了一个java代码，但没有找到结果

public static void main(String[] args) {
        Pattern p1 = Pattern.compile("bridge (s.*?): added interface (s.*?) on port (\\d+)");
        Matcher m = p1.matcher("bridge s1: added interface s1-eth2 on port 0");
        String log_output = "";

        StringBuffer sb = new StringBuffer();
        while (m.find()) {
            m.appendReplacement(sb, " ");
        }
        m.appendTail(sb);
        System.out.println(sb.toString());

    }

祝大家今天愉快

Answer 1

你需要在哪里使用那个正则表达式？您可以使用以下方法检测您的行(并将单个s1/s1-eth2/0结果分组)：

bridge (.*?): added interface (.*?) on port (\d+)

如果希望分隔符不同(例如，制表符)或具有多个空白字符，则用\s或\s+替换空格。

编辑:您没有指定使用哪种语言，也没有指定如何使用regex。下面是如何在Java中访问组：

public static void main(String[] args) {
    Pattern p1 = Pattern.compile("bridge (s.*?): added interface (s.*?) on port (\\d+)");
    Matcher m = p1.matcher("bridge s1: added interface s1-eth2 on port 0");
    while (m.find()) {
        System.out.println("Matched: " + m.group(1) + ", " + m.group(2) + ", " + m.group(3));
        // outputs: Matched: s1, s1-eth2, 0
    }
}