java - JAVA中无法转义双引号

Question

当我尝试将 map 转换为字符串时，我正在努力转义双引号

//iterate through map and append to array
    StringBuilder mapAsString = new StringBuilder("{");
    for (String key : billingDetails.keySet()) {
        mapAsString.append(key + ":" + billingDetails.get(key) + ", ");
    }
    mapAsString.delete(mapAsString.length()-2, mapAsString.length()).append("}");
    String bdResult = mapAsString.toString();

电流输出

"position": [
"{2018:Element3, 2012:Element2, 2010:Element1}"

预期输出

"position": [
"{"2018":"Element3", "2012":"Element2", "2010":"Element1"}"

以下方法将映射的内容附加到字符串，但是我似乎无法弄清楚如何转义引号以使预期输出正确

 mapAsString.append(key + ":" + billingDetails.get(key) + ", ");

在java中转义字符对我来说一直有些困难，如果有更广泛知识的人能帮助我，我将不胜感激

干杯和感谢

Answer 1

用反斜杠转义引号

mapAsString.append("\"" + key + "\":\"" + billingDetails.get(key) + "\", ");