IntelliJ IDEA toString templates for JSON output

JSON use StringBuilder

public java.lang.String toString() {
final java.lang.StringBuilder sb = new java.lang.StringBuilder("{");
#set ($i = 0)
#foreach ($member in $members)#if ($i == 0)
sb.append("#####
#else
sb.append(",####
#end#if ($member.stringArray)
\"$member.name\":");
#elseif ($member.string || $member.date)
\"$member.name\":\"")
#elseif($member.map||$member.collection)
\"$member.name\":");
#else
\"$member.name\":")
#end#if ($member.stringArray)
if (($member.accessor) != null && ($member.accessor).length > 0) {
    sb.append("[");
    final int stringArrayLength = ($member.accessor).length;
    for (int i = 0; i < stringArrayLength; i++) {
        sb.append("\"").append(($member.accessor)[i]).append("\"");
        if (i < stringArrayLength - 1) {
            sb.append(",");
        } else {
            sb.append("]");
        }
    }
} else {
    sb.append("[]");
}
#elseif ($member.primitiveArray || $member.objectArray)
.append(java.util.Arrays.toString($member.accessor));
#elseif ($member.string || $member.date)
.append(java.util.Objects.toString($member.accessor,"")).append('\"');
#elseif($member.list)
if (($member.accessor) != null && !($member.accessor).isEmpty()) {
    sb.append("[");
    final int listSize = ($member.accessor).size();
    for (int i = 0; i < listSize; i++) {
        final Object listValue=($member.accessor).get(i);
        if (listValue instanceof CharSequence) {
            sb.append("\"").append(java.util.Objects.toString(listValue,"")).append("\"");
        } else {
            sb.append(java.util.Objects.toString(listValue,""));
        }
        if (i < listSize - 1) {
            sb.append(",");
        } else {
            sb.append("]");
        }
    }
} else {
    sb.append("[]");
}
#elseif($member.map)
if (($member.accessor) != null && !($member.accessor).isEmpty()) {
    sb.append("{");
    final Set<?> mapKeySet=($member.accessor).keySet();
    for (java.lang.Object mapKey: mapKeySet) {
        final Object mapValue=($member.accessor).get(mapKey);
        sb.append("\"").append(mapKey).append("\":\"").append(java.util.Objects.toString(mapValue,"")).append("\",");
    }
    sb.replace(sb.length() - 1, sb.length(), "}");
} else {
    sb.append("{}");
}
#elseif($member.collection)
if (($member.accessor) != null && !($member.accessor).isEmpty()) {
    sb.append("[");
    for (java.lang.Object collectionValue: $member.accessor) {
        sb.append("\"").append(java.util.Objects.toString(collectionValue,"")).append("\",");
    }
    sb.replace(sb.length() - 1, sb.length(), "]");
} else {
    sb.append("[]");
}
#else
.append($member.accessor);
#end#set ($i = $i + 1)
#end
sb.append('}');
return sb.toString();
}

Thank you. I was using it as toString 🤦🏻‍♂️
I finally understood the use case. It's quite elegant to use case.