Convert java Map to custom key=value string

Question

I have TreeMap which I need to convert to URI-like string and then back to Map. I need to set custom delimiters.

Is there any tool (Gu

Answer 1

In java 8 and up there is another way without external dependencies: use StringJoiner:

    List cities = Arrays.asList("Milan", 
                                        "London", 
                                        "New York", 
                                        "San Francisco");

    String citiesCommaSeparated = String.join(",", cities);

    System.out.println(citiesCommaSeparated);


    //Output: Milan,London,New York,San Francisco

Credits and example go to this URL (https://reversecoding.net/java-8-convert-list-string-comma/)