Question

我写了这个JSON代码

public class TestClass {

    public static void main(String[] args) {
        String inputJson= "{" +"\"contexts\" : {  "+ "{ " + "\"times\" : { " + "{  " + "\"end\":17, " + "\"begin\" : 9 " +  "}" + "}," +    "\"contextname\":\"OFFICE_HOURS\" " +   "}," + "{ " + "\"days\": { " + "\"MON\", " +    "\"TUE\", " + "\"WED\" , " + "\"THU\", " +  "\"FRI\" " +    "} , " + "\"contextname\" : \"WORKDAYS\" " +    "}";
        ObjectMapper mapper= new ObjectMapper();
        mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);

        try {

            MainParser mp= mapper.readValue(inputJson, MainParser.class);

            System.out.println(mp.getContextname());
        }

但是我在控制台框中发现了此错误

org.codehaus.jackson.JsonParseException: Unexpected character ('{' (code 123)): was expecting double-quote to start field name
 at [Source: java.io.StringReader@7cf10a6f; line: 1, column: 19]

我需要帮助

Answer 1

格式化后，您的JSON如下所示：

{
  "contexts": {
    {
      "times": {
        {
          "end": 17,
          "begin": 9
        }
      },
      "contextname": "OFFICE_HOURS"
    },
    {
      "days": {
        "MON",
        "TUE",
        "WED",
        "THU",
        "FRI"
      },
      "contextname": "WORKDAYS"
    }

这是无效的，有多种原因。

通过使用数组替换“上下文”的内容并将日期包装在数组中，并删除一些多余的花括号，可以使其生效。

{
  "contexts": [
    {
      "times": {
        "end": 17,
        "begin": 9
      },
      "contextname": "OFFICE_HOURS"
    },
    {
      "days": [
        "MON",
        "TUE",
        "WED",
        "THU",
        "FRI"
      ],
      "contextname": "WORKDAYS"
    }
  ]
}

更好的方法可能是使用“ contextname”值作为键并简化整个JSON。

{
  "OFFICE_HOURS": {
    "end": 17,
    "begin": 9
  },
  "WORKDAYS": [
    "MON",
    "TUE",
    "WED",
    "THU",
    "FRI"
  ]
}

Answer 2

以下是根据代码的Json字符串。它不是正确的json格式。

{“ contexts”：{{“ times”：{{“ end”：17，“ begin”：9}}，“ contextname”：“ OFFICE_HOURS”}，{“ days”：{“ MON”，“ TUE”，“ WED”，“ THU”，“ FRI”}，“ contextname”：“ WORKDAYS”}

尝试修复json字符串格式，然后再次运行代码。

JSON错误消息

2 个答案: