【发布时间】：2014-10-20 00:43:51
【问题描述】：
我目前无法连接到我在 android 上的网络服务。我使用 jackson-core/databind/annotation-2.2.4 和 Spring RESTWebService。如果我从浏览器访问 URL，我可以看到 JSON 响应：（服务器返回 List\Shop\ 看起来像：）
[{"name":"shopqwe","mobiles":[],"address":{"town":"city",
"street":"streetqwe","streetNumber":"59","cordX":2.229997,"cordY":1.002539},
"shoe" [{"shoeName":"addidas","number":"631744030","producent":"nike","price":999.0,
"sizes":[30.0,35.0,38.0]}]
从客户端端点（Android 应用程序）我收到以下错误消息：
08-26 17:43:07.406: E/AllShopsAsyc(28203): Could not read JSON: Can not deserialize
instance of com.auginzynier.data.ShopContainer out of START_ARRAY token
08-26 17:43:07.406: E/AllShopsAsyc(28203): at [Source:
com.android.okhttp.internal.http.HttpTransport$ChunkedInputStream@41efbd48; line: 1,
column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException:
Can not deserialize instance of com.auginzynier.data.ShopContainer out of START_ARRAY
token
08-26 17:43:07.406: E/AllShopsAsyc(28203): at [Source:
com.android.okhttp.internal.http.HttpTransport$ChunkedInputStream@41efbd48; line: 1,
column: 1]
08-26 17:43:07.406: E/AllShopsAsyc(28203):
org.springframework.http.converter.HttpMessageNotReadableException: Could not read
JSON: Can not deserialize instance of com.auginzynier.data.ShopContainer out of
START_ARRAY token
我的服务器请求
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
ShopContainer response = restTemplate.getForObject(url, ShopContainer.class);
ShopContainer 在哪里：
public class ShopContainer {
private List<Shop> shops;
Shop、Address 和 Shoe 的结构是：（我省略了 getter 和 setter）：
public class Shop {
@JsonProperty("name") private String name;
@JsonProperty("mobiles") private List<String> mobiles = new ArrayList<String>();
@JsonProperty("address") private Address address;
@JsonProperty("shoe") private List<Shoe> shoe = new ArrayList<Shoe>();
public class Address {
@JsonProperty("town") private String town;
@JsonProperty("street") private String street;
@JsonProperty("streetNumber") private String streetNumber;
@JsonProperty("cordX") private Double cordX;
@JsonProperty("cordY") private Double cordY;
public class Shoe {
@JsonProperty("shoeName") private String shoeName;
@JsonProperty("number") private String number;
@JsonProperty("producent") private String producent;
@JsonProperty("price") private Double price;
@JsonProperty("sizes") private List<Double> sizes = new ArrayList<Double>();
我在这里和谷歌上看过，但仍然无法弄清楚我现在缺少什么。
任何回应都会非常有帮助。
问候。
@UPDATE
我已经通过使用杰克逊的 ObjectMapper 和 RequestMethod.GET 修复了 JSON。它现在返回一个字符串。
list is List<Shop>
ObjectMapper mapper = new ObjectMapper();
mapper.writeValue(new File("D:\\Android\\shop.json"), list);
System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(list));
return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(list);
控制台中的 JSON 如下所示：
[ {
"name" : "shopqwe",
"mobiles" : [ ],
"address" : {
"town" : "city",
"street" : "streetqwe",
"streetNumber" : "59",
"cordX" : 2.229997,
"cordY" : 2.002539
},
"shoe" : [ {
"shoeName" : "addidas",
"number" : "631744033",
"producent" : "nike",
"price" : 10.0,
"sizes" : [ 30.0, 35.0, 38.0 ]
} ]
} ]
请求仍然不起作用 - 错误是一样的。
【问题讨论】：
标签： android json spring web-services jackson