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  1. import java.util.*;
  2. import java.util.stream.Collectors;
  3. import java.util.AbstractMap.SimpleImmutableEntry;
  4. import static java.util.stream.Collectors.toList;
  5.  
  6. class ParseParams {
  7.  
  8.     Map<String, List<String>> parseParams(String url) {
  9.  
  10.         return Arrays.stream(url.split("&"))
  11.                 .map(this::splitQueryParameter)
  12.                 .collect(Collectors.groupingBy(SimpleImmutableEntry::getKey, LinkedHashMap::new, Collectors.mapping(Map.Entry::getValue, toList())));
  13.     }
  14.  
  15.     private SimpleImmutableEntry<String, String> splitQueryParameter(String it) {
  16.         final int idx = it.indexOf("=");
  17.         String key = idx > 0 ? it.substring(0, idx) : it;
  18.         String value = idx > 0 && it.length() > idx + 1 ? it.substring(idx + 1) : null;
  19.         if (key.contains("<")) {
  20.             key = key.replace("<", "");
  21.         }
  22.         return new SimpleImmutableEntry<>(key, value);
  23.     }
  24. }
  25.  
  26. public class Main {
  27.  
  28.     public static void main(String[] strg) {
  29.  
  30.         String str = "//RULE countryname=Brazil&useryear<=2017&usermonth<=01&userdayofmonth<=15 200";
  31.         str = str.substring(str.indexOf(" "), str.lastIndexOf(" "));
  32.         try {
  33.             ParseParams parse = new ParseParams();
  34.             Map<String, List<String>> map = parse.parseParams(str);
  35.             map.entrySet().forEach(entry -> {
  36.                 System.out.println("Key : " + entry.getKey() + " Value : " + entry.getValue());
  37.             });
  38.         } catch (Throwable t) {
  39.             t.printStackTrace();
  40.         }
  41.     }
  42. }
Success #stdin #stdout 0.09s 711680KB
comments (?)
stdin 
Standard input is empty
stdout 
Key :  countryname Value : [Brazil]
Key : useryear Value : [2017]
Key : usermonth Value : [01]
Key : userdayofmonth Value : [15]
https://ideone.com/gmBXM3
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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