java - com.google.gson.JsonSyntaxException 试图解析 json 中的日期/时间

Question

我正在使用 RestTemplete 从 rest api 获取 json 数据，我正在使用 Gson 将数据从 json 格式解析为对象

Gson gson = new Gson();

restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new GsonHttpMessageConverter());
restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

List<Appel> resultList = null;

resultList = Arrays.asList(restTemplate.getForObject(urlService, Appel[].class));

但是我遇到了 Date 的问题，我该怎么办..

Could not read JSON: 1382828400000; nested exception is com.google.gson.JsonSyntaxException: 1382828400000

我的 Pojo 在其主体中包含其他 pojo

public class Appel implements Serializable {

    private Integer numOrdre;
    private String reference;
    private String objet;
    private String organisme;
    private Double budget;
    private Double caution;
    private Date dateParution;
    private Date heureParution;
    private Date dateLimite;
    private Date heureLimite;
    private List<Support> supportList;
    private Ville villeid;
    private Categorie categorieid;

    public Appel() {
    }

    public Appel(Integer numOrdre, String reference, String objet, String organisme, Date dateParution, Date heureParution, Date dateLimite) {
        this.numOrdre = numOrdre;
        this.reference = reference;
        this.objet = objet;
        this.organisme = organisme;
        this.dateParution = dateParution;
        this.heureParution = heureParution;
        this.dateLimite = dateLimite;
    }

这是我的 API 返回的 json

[
   {
       "numOrdre": 918272,
       "reference": "some text",
       "objet": "some text",
       "organisme": "some text",
       "budget": 3000000,
       "caution": 3000000,
       "dateParution": 1382828400000,
       "heureParution": 59400000,
       "dateLimite": 1389657600000,
       "heureLimite": 34200000,
       "supportList":
       [
           {
               "id": 1,
               "nom": "some text",
               "dateSupport": 1384732800000,
               "pgCol": "013/01"
           },
           {
               "id": 2,
               "nom": "some text",
               "dateSupport": 1380236400000,
               "pgCol": "011/01"
           }
       ],
       "villeid":
       {
           "id": 2,
           "nom": "Ville",
           "paysid":
           {
               "id": 1,
               "nom": "Pays"
           }
       },
       "categorieid":
       {
           "id": 1,
           "description": "some text"
       }
   },
  .....
]

Answer 1

不再需要自定义序列化程序 - 只需使用 GsonBuilder，并指定日期格式，如下所示:

Timestamp t = new Timestamp(System.currentTimeMillis());

String json = new GsonBuilder()
               .setDateFormat("yyyy-MM-dd hh:mm:ss.S")
               .create()
               .toJson(t);

System.out.println(json);