Java字符串拆分給出意外結果

Question

我有這個字符串

String x = "2013-04-17T08:00:00.001,41.14806,-9.58972,-13.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-22.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-31.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-40.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-49.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-58.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-64.0,0.0,0.0,-20.0,4";

如果我正在進行分裂，就像這樣的String vec2 [] = x.split(","); 輸出就是這個

2013-04-17T08:00:00.001
41.14806
-9.58972
-13.0
0.0
0.0
-20.0

等等。

如果我正在進行拆分，就像這樣的String vec2[] = x.split("|"); 輸出是這樣的：

2
0
1
3
-
0
4
-
1
7
T
0
8
:
0
0
:

等等。

我期待類似的東西：

    2013-04-17T08:00:00.001,41.14806,-9.58972,-13.0,0.0,0.0,-20.0,4
    2013-04-17T08:00:00.001,41.14806,-9.58972,-22.0,0.0,0.0,-20.0,4
    and so on

知道什么是錯的嗎？

Answer 1

你需要逃避| ：

String vec2[] = x.split("\\|");

那是因為split（）的參數是正則表達式而不是字符串。

在正則表達式中，某些字符具有特殊含義。 豎條| 代表交替。 所以如果你想根據|分割 ，你需要寫\\\\| 喜歡說：“ 不要把 | 作為一個特殊的角色，把它作為符號 | ”。

Answer 2

split的參數是正則表達式和“|” 人物有特殊的意義。 嘗試逃避它\\\\| 。

Answer 3

String.split(String)在正則表達式上分割，而不是在字符上分割。 正如您在Java正則表達式構造的摘要中所看到的那樣， | 作為一個or構造的功能。

如果你想拆分| 你可能需要使用\\|來轉義它 。 請注意，要在Java String轉義它，您還需要轉義反斜杠： \\\\| 。

Answer 4

問題是split(String regex)將正則表達式作為參數。 管道（ | ）是正則表達式中的特殊字符，因此必須進行轉義：

        String x = "2013-04-17T08:00:00.001,41.14806,-9.58972,-13.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-22.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-31.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-40.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-49.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-58.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-64.0,0.0,0.0,-20.0,4";
        String[] arr = x.split("\\|");
        for(String str : arr)
        {
            System.out.println(str);
        }

產量：

2013-04-17T08:00:00.001,41.14806,-9.58972,-13.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-22.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-31.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-40.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-49.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-58.0,0.0,0.0,-20.0,4
2013-04-17T08:00:00.001,41.14806,-9.58972,-64.0,0.0,0.0,-20.0,4

Answer 5

嘗試這個

 String vec2[] = x.split("\\|");

Answer 6

你需要逃避| 字符，因為它是正則表達式或模式。

String x = "2013-04-17T08:00:00.001,41.14806,-9.58972,-13.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-22.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-31.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-40.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-49.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-58.0,0.0,0.0,-20.0,4|2013-04-17T08:00:00.001,41.14806,-9.58972,-64.0,0.0,0.0,-20.0,4";
String[] arr = x.split("\\|");
for(String s: arr){
    System.out.println(s);
}

Answer 7

你試過逃避這個角色嗎？

x.split("\\|");