如何用引号，站点运算符和非引号分割字符串？

Question

我收到这样的用户请求

site:www.example.com \"hello world\" \"hi abc\" where are you

我想从这个字符串中提取并保存 url 然后从上面的字符串中删除它，它应该看起来像这样"hello world" "hi abc" where are you 现在将剩余的字符串拆分为两个字符串数组

String str1 = {hello world, hi abc};
String str2 = {where, are, you};

我怎样才能在java中做到这一点？ 用户查询可以是任何顺序。各种例子：

 "hi" excitement site:www.example.com \"hello world\" \"hi abc\" where are you "amazing"   
OR
    Hello World friends
OR
 Greeting is an "act of communication" human beings "intentionally"  

Answer 1

我认为这段代码可以帮助你：

static class ExtractResponse {
    String newStr;
    String site;
}

public static ExtractResponse extractSite(String origin) {
    Pattern pattern = Pattern.compile("site:\\S* ");
    Matcher matcher = pattern.matcher(origin);

    ExtractResponse response = new ExtractResponse();
    StringBuffer buffer = new StringBuffer();
    while (matcher.find()) {
        response.site = matcher.group().substring(5); // 5 is length of "site:"
        matcher.appendReplacement(buffer, "");
    }
    matcher.appendTail(buffer);

    response.newStr = buffer.toString();
    return response;
}

它将返回包含新字符串的响应，其中不包含站点：* 和站点 url。 例如，我使用了来自 answer 和 cmets 的案例：

public static void main(String[] args) {
    String str1 = "site:www.example.com \"hello world\" \"hi abc\" where are you";
    String str2 = "\"hello world\" \"hi abc\" site:www.example.com where are you";

    ExtractResponse response1 = extractSite(str1);
    System.out.println(response1.newStr);
    System.out.println(response1.site);

    ExtractResponse response2 = extractSite(str2);
    System.out.println(response2.newStr);
    System.out.println(response2.site);
}

输出：

“你好世界”“嗨 abc”你在哪里

www.example.com

“你好世界”“嗨 abc”你在哪里

www.example.com

Answer 2

这是一个非常具体的问题，下面的逻辑可能对您有所帮助。我建议您在使用实际数据进行测试时完善这一点。

public static void main(String[] args) {
    String test1 = "site:www.example.com \"hello world\" \"hi abc\" where are you";
    String regex = "\\b(https?|ftp|file|site):[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]";
    String[] info = test1.split("\"");

    //read url
    String url;
    if (info.length > 0 && info[0].trim().matches(regex))
        url = info[0].trim();
    else
        throw new RuntimeException("Not a valid input");

    // read str1
    String[] info1 = Arrays.copyOfRange(info, 1, info.length - 1);
    String str1 = mkString(info1, ",");

    //read str2
    String[] info2 = info[info.length - 1].trim().split("\\s");
    String str2 = mkString(info2, ",");


    System.out.println("URL: " + url + " STR1: " + str1 + " STR2: " + str2);

}

// returns a delimited and curly parentheses {} enclosed string
public static String mkString(String[] input, String delimeter) {
    String result = "{";
    for (int i = 0; i < input.length - 1; i++) {
        if (input[i].trim().length() > 0) {
            result += (input[i] + delimeter);
        }
    }
    result += (input[input.length - 1] + "}");
    return result;
}