Java字符串拆分给出意外结果

Question

我有这个字符串

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";

如果我正在进行分裂，就像这样的String vec2 [] = x.split(","); 输出就是这个

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

等等。

如果我正在进行拆分，就像这样的String vec2[] = x.split("|"); 输出是这样的：

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

等等。

我期待类似的东西：

    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

知道什么是错的吗？

Answer 1

你需要逃避| ：

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

那是因为split（）的参数是正则表达式而不是字符串。

在正则表达式中，某些字符具有特殊含义。 竖条| 代表交替。 所以如果你想根据|分割 ，你需要写\\\\| 喜欢说：“ 不要把 | 作为一个特殊的角色，把它作为符号 | ”。

Answer 2

split的参数是正则表达式和“|” 人物有特殊的意义。 尝试逃避它\\\\| 。

Answer 3

String.split(String)在正则表达式上分割，而不是在字符上分割。 正如您在Java正则表达式构造的摘要中所看到的那样， | 作为一个or构造的功能。

如果你想拆分| 你可能需要使用\\|来转义它 。 请注意，要在Java String转义它，您还需要转义反斜杠： \\\\| 。

Answer 4

问题是split(String regex)将正则表达式作为参数。 管道（ | ）是正则表达式中的特殊字符，因此必须进行转义：

        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);
        }

产量：

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

尝试这个

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

Answer 6

你需要逃避| 字符，因为它是正则表达式或模式。

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

你试过逃避这个角色吗？

x.split("\\|");