java - 正则表达式保留引号、单引号、连字符并在空格处分割

Question

我使用 Java Pattern 类将正则表达式指定为字符串。

举个例子我喜欢成为蜘蛛侠:“彼得·帕克”

应将蜘蛛侠和“Peter Parker”列为单独的标记。谢谢

try {
     BufferedReader br = new BufferedReader(new FileReader(f));
     StringBuilder sb = new StringBuilder();
     String line = br.readLine();

     while (line != null) {
        sb.append(line);
        line = br.readLine();
     }

    String everything = sb.toString();        
    List<String> result = new ArrayList<String>();
    Pattern pat = Pattern.compile("([\"'].*?[\"']|[^ ]+)");
    PatternTokenizer pt = new PatternTokenizer(new StringReader(everything),pat,0);
    while (pt.incrementToken()) {
     result.add(pt.getAttribute(CharTermAttribute.class).toString());

     }

 }
    catch (Exception e) {
    throw new RuntimeException(e);
   }

所以我猜“某个单词”不起作用的原因是因为每个标记本身就是一个字符串。有什么线索吗？谢谢

Answer 1

如果它不必是正则表达式，并且 String 中的数据是正确的(引号的顺序正确，不像 "' some data "')，那么您可以在 中执行此操作一次迭代就像

String data="I love being spider-man : \"Peter Parker\" or 'photo reporter'";

List<String> tokens = new ArrayList<String>();
StringBuilder sb=new StringBuilder();
boolean inSingleQuote=false;
boolean indDoubleQuote=false;

for (char c:data.toCharArray()){
    if (c=='\'') inSingleQuote=!inSingleQuote;
    if (c=='"') indDoubleQuote=!indDoubleQuote;
    if (c==' ' && !inSingleQuote && !indDoubleQuote){
        tokens.add(sb.toString());
        sb.delete(0,sb.length());
    }
    else 
        sb.append(c);
}
tokens.add(sb.toString());
System.out.println(tokens);

输出

[I, love, being, spider-man, :, "Peter Parker", or, 'photo reporter']