在給定的字符串中，我只想在“ENERGY:”之后提取字符串1562173405047|INFO|MyHalfDuplexModem@30:println|ENERGY: -s 1 -d 2 -b 288 -e 9.999788799994675071125 T {-s 1, -d 2 }1562173405552|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 3 -d 2 -b 96 -e 9.999779196127731100294 R {-s 3, -d 2 }1562173406122|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 1 -d 2 -b 288 -e 9.999764796127731100294 R {-s 1, -d 2 }1562173406194|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 2 -d 1 -b 96 -e 9.999759995924876667052 T {-s 2, -d 1 }這是我的代碼：public static void main(String[] args) { //movies = new ArrayList<movie>(); realPath = "Z:\\UNET\\3 NODE 1 SOURCE\\log-0.txt"; File f = new File(realPath); if ( !f.exists()) { System.err.println("file path not specified"); } try { String regex1 = "[0-9]+\|INFO\|MyHalfDuplexModem@[0-9]+:println\|ENERGY:"; Scanner sc = new Scanner(f); while (sc.hasNextLine()) { String nextLine = sc.nextLine(); if ( !nextLine.matches(regex1)) { System.out.println(nextLine); } } // sc.close(); } catch(Exception e) { throw new RuntimeException(e); } }我嘗試了以下正則表達式，但它不起作用： regex1 = "[0-9]+[|]INFO[|]MyHalfDuplexModem@[0-9]+:println|ENERGY:";
2 回答
慕斯王
TA貢獻1864條經驗 獲得超2個贊
稍微逃避你應該是好的：
regex1 = "[0-9]+\|INFO\|MyHalfDuplexModem@[0-9]+:println\|ENERGY:";
^^ this was the problem
|
`- this is the fix
沒有逃逸|是一種交替，有效地導致"[0-9]+|INFO|MyHalfDuplexModem@[0-9]+:println" OR "ENERGY:"
另請注意，它\|與[|]. 我更喜歡前者。
慕森王
TA貢獻1777條經驗 獲得超3個贊
我想，這一個抓住了你想要的。它不是在 Java 中，它是純正則表達式。
ENERGY:\s(.*)
這是Java示例
public static void main(String[] args) {
Pattern p = Pattern.compile("ENERGY:\\s(.*)");
String st = "1562173405047|INFO|MyHalfDuplexModem@30:println|ENERGY: -s 1 -d 2 -b 288 -e 9.999788799994675071125 T {-s 1, -d 2 }\n" +
"1562173405552|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 3 -d 2 -b 96 -e 9.999779196127731100294 R {-s 3, -d 2 }\n" +
"1562173406122|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 1 -d 2 -b 288 -e 9.999764796127731100294 R {-s 1, -d 2 }\n" +
"1562173406194|INFO|MyHalfDuplexModem@43:println|ENERGY: -s 2 -d 1 -b 96 -e 9.999759995924876667052 T {-s 2, -d 1 }";
Matcher mt = p.matcher(st);
while (mt.find()) {
String group = mt.group(1);
System.out.println(group);
}
}
輸出：
-s 1 -d 2 -b 288 -e 9.999788799994675071125 T {-s 1, -d 2 }
-s 3 -d 2 -b 96 -e 9.999779196127731100294 R {-s 3, -d 2 }
-s 1 -d 2 -b 288 -e 9.999764796127731100294 R {-s 1, -d 2 }
-s 2 -d 1 -b 96 -e 9.999759995924876667052 T {-s 2, -d 1 }
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