GSON：预计BEGIN_OBJECT但是STRING

问题描述

我在尝试将JSON解组为对象时遇到GSON错误。错误（预期BEGIN_OBJECT但在第3行第22列STRING ）指向下面输入的第3行。

我是否未映射关于Bean的JSON是否正确？

  import javax.xml.bind.JAXBElement; 
 
公共类BusinessPartnerCreate {
 protected JAXBElement< String> partnerType; 
受保护的人; 
保护公司公司; 
 protected String email; 
 protected String phone; 
 protected AddressData addressData; 
 protected AddressClean addressClean; 
 protected String city; 
 protected String状态; 
 protected String zipCode; 
 protected JAXBElement< String>外部ID; 
} 
  

我输入的JSON看起来是这样的：

  {
business-partner-create：{
partner-type：1，
person ：{
firstName：Dirk，
lastName：Wintermill，
title：
}，
电子邮件 ：kirk @ yahoo.com，
电话：219-385-2946，
addressClean：{
house-number：10218，
street-name：Park，
street-abbr：Rd
}，
city：Somerset，
state ：NJ，
邮政编码：01955
} 
} 
  

解决方案

不，你没有正确映射，因为你的json对象不是 BusinessPartnerCreate ，它包含 BusinessPartnerCreate 。

您可以创建一个类来封装您的 BusinessPartnerCreate 但是使用

 <$将容器反序列化为 jsonObject 会更清晰c $ c> JsonParser解析器= new JsonParser（）; 
 JsonObject obj = parser.parse（json）.getAsJsonObject（）; 
  

然后使用

BusinessPartnerCreate bpc = gson.fromJson（obj.get（business-partner-create），BusinessPartnerCreate.class）;


我建议你添加一个注释，以确保正确映射 partnerType 字段：

  @SerializedNamepartner-type
 protected JAXBElement< String> partnerType; 
  

（和邮政编码类似）

I am getting a GSON error trying to unmarshal JSON into an object. The error (Expected BEGIN_OBJECT but was STRING at line 3 column 22) is pointing to line 3 of the input below.

Have I not mapped the JSON correctly with respect to the Bean?

import javax.xml.bind.JAXBElement;

public class BusinessPartnerCreate {
    protected JAXBElement<String> partnerType;
    protected Person person;
    protected Company company;
    protected String email;
    protected String phone;
    protected AddressData addressData;
    protected AddressClean addressClean;
    protected String city;
    protected String state;
    protected String zipCode;
    protected JAXBElement<String> externalId;
}

And my input JSON looks is this:

{
    "business-partner-create": {
        "partner-type": "1",
        "person": {
            "firstName": "Dirk",
            "lastName": "Wintermill",
            "title": ""
        },
        "email": "[email protected]",
        "phone": "219-385-2946",
        "addressClean": {
            "house-number": "10218",
            "street-name": "Park",
            "street-abbr": "Rd"
        },
        "city": "Somerset",
        "state": "NJ",
        "zip-code": "01955"
    }
}

解决方案

No, you've not mapped it correctly as your json object isn't a BusinessPartnerCreate, it contains a BusinessPartnerCreate.

You can create a class just to encapsulate your BusinessPartnerCreate but it would be cleaner to deserialize the container as a jsonObject using

 JsonParser parser = new JsonParser();
 JsonObject obj = parser.parse(json).getAsJsonObject();

and then parse the interesting content using

BusinessPartnerCreate bpc = gson.fromJson(obj.get("business-partner-create"), BusinessPartnerCreate.class);

And I suggest you add an annotation to ensure proper mapping of the partnerType field :

   @SerializedName "partner-type"
   protected JAXBElement<String> partnerType;

(and similar for zip-code)

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