Google GSON: Deserialize JSON data to Java

Question

We are using Google GSON for deserializing JSON data to Java object. See below sample JSON data and corresponding POJO class. I am able to deserialize "name" and "phoneNumber" fields. But for "deparments" field, I see Null. Can you please help me how can I deserialize "deparments" field?

My JSON:

{
  "name": "customer",
  "phoneNumber": "000000000",
  "deparments": "xyz,abc,wyz,djkf, iii"
}

The class:

public class CustomerInfo
{
    private String name;
    private String phoneNumber;
    private String deparments;

    // getters and setters
}

CustomerDeserializer.java:

...
Gson gson = new Gson();
CustomerInfo customerInfo = gson.fromJson(reader, CustomerInfo.class);

Can you paste in the actual code? This clearly isn't it as there are spelling mistakes (e.g. "Privaet") and case inconsistencies, making it impossible to diagnose the actual problem. — Adamski
– Adamski, Commented Feb 19, 2016 at 14:58

Taky · Accepted Answer · 2016-02-19 15:44:26Z

Recheck your JSON source. I think you just have some objects with key: departments, instead of deparments.

Anyway next code works for me:

public class CustomerInfo
{
    private String name;
    private String phoneNumber;
    private String deparments;

    // getters and setters
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public String getPhoneNumber(){
        return phoneNumber;
    }
    public void setPhoneNumber(String phoneNumber){
        this.phoneNumber = phoneNumber;
    }
    public String getDeparments() {
        return deparments;
    }
    public void setDeparments(String deparments) {
        this.deparments = deparments;
    }

    @Override
    public String toString() {
        return "CustomerInfo{" +
                "name='" + name + '\'' +
                ", phoneNumber='" + phoneNumber + '\'' +
                ", deparments='" + deparments + '\'' +
                '}';
    }
}

@Test
public void desJson(){
    String json = "{\n" +
            "  \"name\": \"customer\",\n" +
            "  \"phoneNumber\": \"000000000\",\n" +
            "  \"deparments\": \"xyz,abc,wyz,djkf, iii\"\n" +
            "}";
    Gson gson = new Gson();
    CustomerInfo customerInfo = gson.fromJson(json, CustomerInfo.class);
    System.out.println(customerInfo);
}

the output is:

CustomerInfo{name='customer', phoneNumber='000000000', deparments='xyz,abc,wyz,djkf, iii'}

Lester L. · Accepted Answer · 2016-02-19 16:07:47Z

0

Copy and Paste this code below

public class CustomerInfo {

    @SerializedName("name")
    private String name;
    @SerializedName("phoneNumber")
    private String phoneNumber;
    @SerializedName("deparments")
    private String deparments;

    @Override
    public String toString() {
        return new Gson().toJson(this, CustomerInfo.class);
    }
}

and Deserialize it like the code below

CustomerInfo customerInfo = new Gson().fromJson(jsonString, CustomerInfo.class);

Hope this helps you.

answered Feb 19, 2016 at 16:07

Lester L.

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