Java 用管道字符（“|”）分割字符串
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Splitting string with pipe character ("|")
提问by Giridharan
I'm not able to split values from this string:
我无法从此字符串拆分值：
"Food 1 | Service 3 | Atmosphere 3 | Value for money 1 "
"Food 1 | Service 3 | Atmosphere 3 | Value for money 1 "
Here's my current code:
这是我当前的代码：
String rat_values = "Food 1 | Service 3 | Atmosphere 3 | Value for money 1 ";
String[] value_split = rat_values.split("|");
Output
输出
[, F, o, o, d, , 1, , |, , S, e, r, v, i, c, e, , 3, , |, , A, t, m, o, s, p, h, e, r, e, , 3, , |, , V, a, l, u, e, , f, o, r, , m, o, n, e, y, , 1, ]
[, F, o, o, d, , 1, , |, , S, e, r, v, i, c, e, , 3, , |, , A, t, m, o, s, p, h, e, r, e, , 3, , |, , V, a, l, u, e, , f, o, r, , m, o, n, e, y, , 1, ]
Expected output
预期输出
Food 1
Service 3
Atmosphere 3
Value for money 1
食物 1
服务 3
氛围 3
物有所值 1
采纳答案by devnull
|is a metacharacter in regex. You'd need to escape it:
|是正则表达式中的元字符。你需要逃避它：
String[] value_split = rat_values.split("\|");
回答by Anirudha
split takes regex as a parameter.|has special meaning in regex.. use \\|instead of |to escape it.
split 将正则表达式作为参数。|在正则表达式中具有特殊含义.. 使用\\|而不是|转义它。
回答by Maroun
Or.. Pattern#quote:
或者.. Pattern#quote：
String[] value_split = rat_values.split(Pattern.quote("|"));
This is happening because String#splitaccepts a regex:
发生这种情况是因为String#split接受正则表达式：
|has a special meaning in regex.
quotewill return a String representation for the regex.
quote将返回正则表达式的字符串表示。
回答by Kick
String rat_values = "Food 1 | Service 3 | Atmosphere 3 | Value for money 1 ";
String[] value_split = rat_values.split("\|");
for (String string : value_split) {
System.out.println(string);
}
回答by Prateek
Using Pattern.quote()
使用 Pattern.quote()
String[] value_split = rat_values.split(Pattern.quote("|"));
//System.out.println(Arrays.toString(rat_values.split(Pattern.quote("|")))); //(FOR GETTING OUTPUT)
Using Escape characters(for metacharacters)
使用转义字符（元字符）
String[] value_split = rat_values.split("\|");
//System.out.println(Arrays.toString(rat_values.split("\|"))); //(FOR GETTING OUTPUT)
Using StringTokenizer(For avoiding regular expression issues)
使用 StringTokenizer（为了避免正则表达式问题）
public static String[] splitUsingTokenizer(String Subject, String Delimiters)
{
StringTokenizer StrTkn = new StringTokenizer(Subject, Delimiters);
ArrayList<String> ArrLis = new ArrayList<String>(Subject.length());
while(StrTkn.hasMoreTokens())
{
ArrLis.add(StrTkn.nextToken());
}
return ArrLis.toArray(new String[0]);
}
Using Pattern class(java.util.regex.Pattern)
使用模式类（java.util.regex.Pattern）
Arrays.asList(Pattern.compile("\|").split(rat_values))
//System.out.println(Arrays.asList(Pattern.compile("\|").split(rat_values))); //(FOR GETTING OUTPUT)
Output
输出
[Food 1 , Service 3 , Atmosphere 3 , Value for money 1 ]
