Android jackson.map.exc.UnrecognizedPropertyException：未识别的字段，未标记为可忽略

我通过点击url获取json数据。之后，我使用json解析，它工作正常，并在android应用程序中显示结果。但这次我尝试使用jackson解析器进行快速解析。我遇到了此错误。请帮助我

代码：

ObjectMapper mapper=new ObjectMapper(); jacksonObj=mapper.readValue(jsonResponse,ContactPojo.class);

pojo：

错误：

02-15 17:20:20.060: W/System.err(3983): org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "contacts" (Class com.example.sampleuserlogin.ContactPojo), not marked as ignorable
02-15 17:20:20.060: W/System.err(3983):  at [Source: java.io.StringReader@4155f0b8; line: 2, column: 18] (through reference chain: com.example.sampleuserlogin.ContactPojo["contacts"])
02-15 17:20:20.065: W/System.err(3983):     at org.codehaus.jackson.map.deser.StdDeserializationContext.unknownFieldException(StdDeserializationContext.java:267)
02-15 17:20:20.065: W/System.err(3983):     at org.codehaus.jackson.map.deser.std.StdDeserializer.reportUnknownProperty(StdDeserializer.java:673)
02-15 17:20:20.070: W/System.err(3983):     at org.codehaus.jackson.map.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:659)
02-15 17:20:20.070: W/System.err(3983):     at org.codehaus.jackson.map.deser.BeanDeserializer.handleUnknownProperty(BeanDeserializer.java:1361)
02-15 17:20:20.075: W/System.err(3983):     at org.codehaus.jackson.map.deser.BeanDeserializer._handleUnknown(BeanDeserializer.java:725)
02-15 17:20:20.075: W/System.err(3983):     at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:703)
02-15 17:20:20.080: W/System.err(3983):     at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)
02-15 17:20:20.085: W/System.err(3983):     at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2732)
02-15 17:20:20.085: W/System.err(3983):     at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1863)
02-15 17:20:20.085: W/System.err(3983):     at com.example.sampleuserlogin.JsonParser.jsonParser(JsonParser.java:50)
02-15 17:20:20.090: W/System.err(3983):     at com.example.sampleuserlogin.RetrieveLogindata$Response.onPostExecute(RetrieveLogindata.java:69)
02-15 17:20:20.095: W/System.err(3983):     at com.example.sampleuserlogin.RetrieveLogindata$Response.onPostExecute(RetrieveLogindata.java:1)
02-15 17:20:20.095: W/System.err(3983):     at android.os.AsyncTask.finish(AsyncTask.java:602)
02-15 17:20:20.095: W/System.err(3983):     at android.os.AsyncTask.access$600(AsyncTask.java:156)
02-15 17:20:20.095: W/System.err(3983):     at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
02-15 17:20:20.095: W/System.err(3983):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-15 17:20:20.100: W/System.err(3983):     at android.os.Looper.loop(Looper.java:137)
02-15 17:20:20.100: W/System.err(3983):     at android.app.ActivityThread.main(ActivityThread.java:4507)
02-15 17:20:20.100: W/System.err(3983):     at java.lang.reflect.Method.invokeNative(Native Method)
02-15 17:20:20.100: W/System.err(3983):     at java.lang.reflect.Method.invoke(Method.java:511)
02-15 17:20:20.100: W/System.err(3983):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
02-15 17:20:20.100: W/System.err(3983):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
02-15 17:20:20.105: W/System.err(3983):     at dalvik.system.NativeStart.main(Native Method)

json:

---

是的，你有一些问题

例如

你需要一个包装纸

public class Contacts {
   public List<ContactPojo> contacts;
}

---

您的

ContactPojo

类不是json中的root。。。您的json是一个带有属性联系人的对象，它是pojo的数组。在这里提问之前，请阅读一些教程

{

     "contacts": [

         {

                 "id": "c200",

                 "name": "sai ram",

                 "email": "sai@gmail.com",

                 "address": "xx-xx-xxxx,x - street, x - country",

                 "gender" : "male",

                 "phone": {

                     "mobile": "+91 0000000000",

                     "home": "00 000000",

                     "office": "00 000000"

                 }

         },

         {

                 "id": "c201",

                 "name": "Johnny Depp",

                 "email": "johnny_depp@gmail.com",

                 "address": "xx-xx-xxxx,x - street, x - country",

                 "gender" : "male",

                 "phone": {

                     "mobile": "+91 0000000000",

                     "home": "00 000000",

                     "office": "00 000000"

                 }

         }
]}

public class Contacts {
   public List<ContactPojo> contacts;
}

public class ContactPojo {
    Phone phone;
}

public class Phone {
     String mobile;
     String home;
     String office;
}