我需要在java中用空格分隔单词,所以我按顺序使用.split
函数来实现,如下所示
String keyword = "apple mango ";
String keywords [] = keyword .split(" ");
上面的代码工作正常,但唯一的问题是我有时候我的关键字会包含" jack fruit" ," ice cream&#34这样的关键字; 使用双引号,如下所示
String keyword = "apple mango \"jack fruit\" \"ice cream\"";
在这种情况下,我需要获得4个词,如 apple ,芒果,杰克果,冰淇淋在关键字数组
任何人都可以告诉我一些解决方案吗
答案 0 :(得分:4)
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);
}
<强>输出:强>
jack fruit
ice cream
apple
mango
答案 1 :(得分:3)
我用正则表达式和两个捕获组来做,每个模式一个。我不知道其他任何方式。
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);
}
答案 2 :(得分:0)
此解决方案有效,但我确信这不是性能/资源的最佳选择。当你的水果含有两个以上的单词时,它也会起作用。随意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;
}
答案 3 :(得分:0)
您无法使用String.split()
执行此操作。你需要为目标令牌提出正则表达式,并通过匹配器收集它们,如下所示:
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() );
答案 4 :(得分:0)
这将在引号上拆分字符串,然后另外用空格拆分成员。
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]);
}
}