I have the following code and I need to output a json object with key value pairs.

public enum General implements Catalogue {
    TOUR("3D Tour"),
    VIDEOS("Videos"),
    PHOTOS_ONLY("Photos Only"),
    PRICE_REDUCED("Price Reduced"),
    FURNISHED("Furnished"),
    LUXURY("Luxury");

    private final String value;

    General(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }

    public static List<String> valuesList() {
        return Arrays.stream(General.values()).map(General::getValue).collect(Collectors.toList());
    }
}

My response should be like this

CodePudding user response：

This method inside your Enum will return General jsonArray alone. You need to construct the final json on top of it.

public static List<Map<String, String>> jsonList() {
        return Arrays.stream(General.values()).map(e -> {
            Map<String, String> m = new HashMap<>();
            m.put("text", e.name());
            m.put("value", e.getValue());
            return m;
        }).collect(Collectors.toList());
    }

Having pojo class with text & value will be good one, instead of putting in map.

public class GeneralPojo {
private String text;
private String value;

public GeneralPojo(String text, String value) {
    this.text = text;
    this.value = value;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

public String getValue() {
    return value;
}

public void setValue(String value) {
    this.value = value;
}

}

If using the above Pojo, then your method should be

public static List<GeneralPojo> jsonObjList() {
    return Arrays.stream(General.values()).map(e -> new GeneralPojo(e.name(), e.getValue()))
            .collect(Collectors.toList());
}