例子1
从非字母中间提取出字母。并且把字符串分成3截。
public class SpiltText {
private static Pattern GET_EN_PATTERN = Pattern.compile("[^a-zA-Z]*([a-zA-Z]+)[^a-zA-Z]*");
public static void main(String[] args) {
trySplit("");
trySplit("RustFisher");
trySplit("..Rust");
trySplit("Fisher..");
trySplit("..<<Hello>>..");
}
private static String[] splitText(String text) {
String[] res = new String[3];
String en = null;
Matcher matcher = GET_EN_PATTERN.matcher(text);
while (matcher.find()) {
en = matcher.group(1);
res[1] = en;
}
if (en != null && en.length() > 0) {
int markLeftEnd = text.indexOf(en);
if (markLeftEnd > 0) {
res[0] = text.substring(0, markLeftEnd);
}
if (markLeftEnd + en.length() < text.length()) {
res[2] = text.substring(markLeftEnd + en.length());
}
} else {
res[0] = text;
}
return res;
}
private static void trySplit(String s) {
String[] ret = splitText(s);
System.out.print(s + " --> ");
for (int i = 0; i < ret.length; i++) {
System.out.print(ret[i]);
if (i + 1 < ret.length) {
System.out.print(" || ");
}
}
System.out.println();
}
}
运行结果
--> || null || null
RustFisher --> null || RustFisher || null
..Rust --> .. || Rust || null
Fisher.. --> null || Fisher || ..
..<<Hello>>.. --> ..<< || Hello || >>..
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