Java将字符串拆分为数组[重复]

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Java String split removed empty values 5 answers
Java String拆分删除空值5个答案

I need help with the split() method. I have the followingString:

我需要split（）方法的帮助。我有以下字符串：

String values = "0|0|0|1|||0|1|0|||";

I need to put the values into an array. There are 3 possible strings: "0", "1", and ""

我需要将值放入数组中。有3种可能的字符串：“0”，“1”和“”

My problem is, when i try to use split():

我的问题是，当我尝试使用split（）时：

String[] array = values.split("\\|");

My values are saved only until the last 0. Seems like the part "|||" gets trimmed. What am i doing wrong?

我的值只保存到最后0.看起来像“|||”部分被修剪。我究竟做错了什么？

thanks

谢谢

4 个解决方案

#1

120

This behavior is explicitly documented in String.split(String regex) (emphasis mine):

String.split（String regex）（强调我的）强调了这种行为：

This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.

此方法的作用就像通过调用给定表达式和limit参数为零的双参数split方法一样。因此，结尾的空字符串不包含在结果数组中。

If you want those trailing empty strings included, you need to use String.split(String regex, int limit) with a negative value for the second parameter (limit):

如果您希望包含那些尾随空字符串，则需要使用String.split（String regex，int limit），并为第二个参数（limit）使用负值：

String[] array = values.split("\\|", -1);

#2

Try this

尝试这个

String[] array = values.split("\\|",-1);

#3

Consider this example:

考虑这个例子：

public class StringSplit {
  public static void main(String args[]) throws Exception{
    String testString = "Real|How|To|||";
    System.out.println
       (java.util.Arrays.toString(testString.split("\\|")));
    // output : [Real, How, To]
  }
}

The result does not include the empty strings between the "|" separator. To keep the empty strings :

结果不包括“|”之间的空字符串分隔器。保持空字符串：

public class StringSplit {
  public static void main(String args[]) throws Exception{
    String testString = "Real|How|To|||";
    System.out.println
       (java.util.Arrays.toString(testString.split("\\|", -1)));
    // output : [Real, How, To, , , ]
  }
}

For more details go to this website: http://www.rgagnon.com/javadetails/java-0438.html

有关更多详细信息，请访问以下网站：http：//www.rgagnon.com/javadetails/java-0438.html

#4

This is expected. Refer to Javadocs for split.

这是预料之中的。请参阅Javadocs以进行拆分。

Splits this string around matches of the given regular expression.

This method works as if by invoking the two-argument split(java.lang.String,int) method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.

此方法的工作方式就像通过调用给定表达式和limit参数为零的双参数split（java.lang.String，int）方法一样。因此，结尾的空字符串不包含在结果数组中。

#1

120