我想通过分隔符“-”将字符串“004-034556”拆分为两个字符串:
part1 = "004";
part2 = "034556";
这意味着第一个字符串将包含“-”之前的字符,第二个字符串将包括“-”之后的字符。
我还想检查字符串中是否有“-”。
我想通过分隔符“-”将字符串“004-034556”拆分为两个字符串:
part1 = "004";
part2 = "034556";
这意味着第一个字符串将包含“-”之前的字符,第二个字符串将包括“-”之后的字符。
我还想检查字符串中是否有“-”。
当前回答
使用Regex使用多个字符拆分字符串
public class StringSplitTest {
public static void main(String args[]) {
String s = " ;String; String; String; String, String; String;;String;String; String; String; ;String;String;String;String";
//String[] strs = s.split("[,\\s\\;]");
String[] strs = s.split("[,\\;]");
System.out.println("Substrings length:"+strs.length);
for (int i=0; i < strs.length; i++) {
System.out.println("Str["+i+"]:"+strs[i]);
}
}
}
输出:
Substrings length:17
Str[0]:
Str[1]:String
Str[2]: String
Str[3]: String
Str[4]: String
Str[5]: String
Str[6]: String
Str[7]:
Str[8]:String
Str[9]:String
Str[10]: String
Str[11]: String
Str[12]:
Str[13]:String
Str[14]:String
Str[15]:String
Str[16]:String
但不要期望所有JDK版本都有相同的输出。我看到了一个bug,在某些JDK版本中,第一个空字符串被忽略了。此错误在最新的JDK版本中不存在,但在JDK1.7晚期版本和1.8早期版本之间的某些版本中存在。
其他回答
这:
String[] out = string.split("-");
应该做你想做的事。string类有许多方法可用于字符串操作。
有时,如果您想拆分包含+的字符串,那么它不会拆分;相反,您将得到一个运行时错误。在这种情况下,首先将+替换为_,然后拆分:
this.text=text.replace("/", "_");
String temp[]=text.split("_");
我查看了所有答案,发现所有答案都是第三方许可或基于正则表达式的。
下面是我使用的一个很好的哑实现:
/**
* Separates a string into pieces using
* case-sensitive-non-regex-char-separators.
* <p>
* <code>separate("12-34", '-') = "12", "34"</code><br>
* <code>separate("a-b-", '-') = "a", "b", ""</code>
* <p>
* When the separator is the first character in the string, the first result is
* an empty string. When the separator is the last character in the string the
* last element will be an empty string. One separator after another in the
* string will create an empty.
* <p>
* If no separators are set the source is returned.
* <p>
* This method is very fast, but it does not focus on memory-efficiency. The memory
* consumption is approximately double the size of the string. This method is
* thread-safe but not synchronized.
*
* @param source The string to split, never <code>null</code>.
* @param separator The character to use as splitting.
* @return The mutable array of pieces.
* @throws NullPointerException When the source or separators are <code>null</code>.
*/
public final static String[] separate(String source, char... separator) throws NullPointerException {
String[] resultArray = {};
boolean multiSeparators = separator.length > 1;
if (!multiSeparators) {
if (separator.length == 0) {
return new String[] { source };
}
}
int charIndex = source.length();
int lastSeparator = source.length();
while (charIndex-- > -1) {
if (charIndex < 0 || (multiSeparators ? Arrays.binarySearch(separator, source.charAt(charIndex)) >= 0 : source.charAt(charIndex) == separator[0])) {
String piece = source.substring(charIndex + 1, lastSeparator);
lastSeparator = charIndex;
String[] tmp = new String[resultArray.length + 1];
System.arraycopy(resultArray, 0, tmp, 1, resultArray.length);
tmp[0] = piece;
resultArray = tmp;
}
}
return resultArray;
}
// This leaves the regexes issue out of question
// But we must remember that each character in the Delimiter String is treated
// like a single delimiter
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]);
}
要拆分字符串,请使用string.split(regex)。查看以下示例:
String data = "004-034556";
String[] output = data.split("-");
System.out.println(output[0]);
System.out.println(output[1]);
输出
004
034556
注:
此拆分(正则表达式)以正则表达式作为参数。记住转义正则表达式特殊字符,如句点/点。