我需要按在Java中分开的空间拆分单词,因此我使用了.split
函数来实现这一目标,如下所示
String keyword = "apple mango ";
String keywords [] = keyword .split(" ");
上面的代码工作正常,但唯一的是我有时我的关键字会包含关键字,例如" jack frual" ,"冰淇淋" ,带有双引号为如下所示
String keyword = "apple mango "jack fruit" "ice cream"";
在这种情况下,我需要得到4个单词,例如 Apple ,芒果, Jack Fruit ,冰淇淋在关键字数组
中任何人都可以告诉我一些解决方案
List<String> parts = new ArrayList<>();
String keyword = "apple mango "jack fruit" "ice cream"";
// first use a matcher to grab the quoted terms
Pattern p = Pattern.compile(""(.*?)"");
Matcher m = p.matcher(keyword);
while (m.find()) {
parts.add(m.group(1));
}
// then remove all quoted terms (quotes included)
keyword = keyword.replaceAll("".*?"", "")
.trim();
// finally split the remaining keywords on whitespace
if (keyword.replaceAll("\s", "").length() > 0) {
Collections.addAll(parts, keyword.split("\s+"));
}
for (String part : parts) {
System.out.println(part);
}
输出:
jack fruit
ice cream
apple
mango
我会用正则表达式和两个捕获组,每个模式一个。我不知道有其他任何方式。
String keyword = "apple mango "jack fruit" "ice cream"";
Pattern p = Pattern.compile(""?(\w+\W+\w+)"|(\w+)");
Matcher m = p.matcher(keyword);
while (m.find()) {
String word = m.group(1) == null ? m.group(2) : m.group(1);
System.out.println(word);
}
此解决方案有效,但我相信这不是最适合性能/资源的方法。当您有两个以上词的水果时,它也有效。随时编辑或优化我的代码。
public static void main(String[] args) {
String keyword = "apple mango "jack fruit" "ice cream" "one two three"";
String[] split = custom_split(keyword);
for (String s : split) {
System.out.println(s);
}
}
private static String[] custom_split(String keyword) {
String[] split = keyword.split(" ");
ArrayList<String> list = new ArrayList<>();
StringBuilder temp = new StringBuilder();
boolean multiple = false;
for (String s : split) {
if (s.startsWith(""")) {
multiple = true;
s = s.replaceAll(""", "");
temp.append(s);
continue;
}
if (s.endsWith(""")) {
multiple = false;
s = s.replaceAll(""", "");
temp.append(" ").append(s);
list.add(temp.toString());
temp = new StringBuilder();
continue;
}
if (multiple) {
temp.append(" ").append(s);
} else {
list.add(s);
}
}
String[] result = new String[list.size()];
for (int i = 0; i < list.size(); i++) {
result[i] = list.get(i);
}
return result;
}
您不能用String.split()
做到这一点。您需要为目标令牌提出正则表达式,然后通过匹配器收集它们,例如:
final Pattern token = Pattern.compile( "[^"\s]+|"[^"]*"" );
List<String> tokens = new ArrayList<>();
Matcher m = token.matcher( "apple mango "jack fruit" "ice cream"" );
while( m.find() )
tokens.add( m.group() );
这将在引号上拆分字符串,然后再按空格将成员分开。
String keyword = "apple mango "jack fruit" "ice cream"";
String splitQuotes [] = keyword.split(""");
List<String> keywords = new ArrayList<>();
for (int i = 0; i < splitQuotes.length; i++) {
if (i % 2 == 0) {
Collections.addAll(keywords, splitQuotes[i].split(" "));
} else {
keywords.add(splitQuotes[i]);
}
}