Talking about the tool class _java of common string and collection class conversion

In projects, we often need to convert the received string to the corresponding collection class to save, or to convert the collection class to a string for easy transmission, which encapsulates several common methods that are convenient for this conversion requirement.

Import Java.util.Arrays;
Import java.util.Collection;
Import Java.util.HashMap;
Import Java.util.HashSet;
Import Java.util.Map;
Import java.util.Properties;
Import Java.util.Set;

Import Java.util.TreeSet; public class Mystringutils {/** * Converts a string to a set collection class * separator is any whitespace character/public static set<string> Parseparame
    Terlist (String values) {set<string> result = new treeset<string> ();
      If values!= null && values.trim (). Length () > 0) {//The spec says the scope is separated by spaces
    string[] tokens = Values.split ("[\\s+]");//matches any whitespace character result.addall (arrays.aslist (tokens));
  return result;  /** * Converts the collection to a specified form of String */public static string Formatparameterlist (collection<string> value) {return Value = null? Null:StringUtils.collectionToDelimitedString (Value, ",");//Specify Delimiter}/** * Extract the required key value from query string to deposit in map * Query form Name=god&password=111&method=up * * public static Map<striNg, string> extractmap (String query) {map<string, string> Map = new hashmap<string, string> (); Properties Properties = Stringutils.splitarrayelementsintoproperties (stringutils.delimitedlisttostringarray) (query
    , "&"), "="); if (properties!= null) {for (Object Key:properties.keySet ()) {Map.put (key.tostring (), Properties.get (ke
      y). toString ());
  } return map;
    /** * Compare two sets for equality */public static Boolean Containsall (set<string> target, set<string> members) {
    target = new hashset<string> (target);
  Target.retainall (members)//Take two sets of intersection return target.size () = = Members.size (); }
}

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