Question

我们正在使用Google GSON将JSON数据反序列化为Java对象。请参阅下面的示例JSON数据和相应的POJO类。我能够反序列化“name”和“phoneNumber”字段。但对于“deparments”字段，我看到Null。你能帮我解决一下如何反序列化“deparments”字段吗？

我的JSON：

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

班级：

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);

Answer 1

重新检查您的JSON来源。我认为你只有一些关键对象：depar t ，而不是 deparments 。

无论如何，下一个代码对我有用：

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);
}

输出是：

CustomerInfo {name =＆＃39; customer＆＃39;，phoneNumber =＆＃39; 000000000＆＃39;， deparments =＆＃39; xyz，abc，wyz，djkf，iii＆＃39;}

Answer 2

复制并粘贴以下代码

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);
    }
}

并像下面的代码一样反序列化

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

希望这会对你有所帮助。

Google GSON：将JSON数据反序列化为Java

2 个答案: