JAXB(MOXy)-解组空值

Question

{
    "accounts": [{
        "description": "A",
        "balance": 1000,
        "balanceAvailable": 1000
    },
    {
        "description": "B",
        "balance": 1001,
        "balanceAvailable": 1001
    },
    {
        "description": "C",
        "balance": 1002,
        "balanceAvailable": 1002
    }],
    "cardPermissions": null,
    "totalBalanceAvailable": 1046.19
}

"cardPermissions": null

"cardPermissions": "null"

在不使用getter和setter的情况下，JAXB可以正确地解组所提供的JSON。

null和“null”是完全不同的东西，但是我不想在POJO中包含这个字段，并且我必须忽略这些null值。

编辑

{
    "customerInfo": {
        "accounts": [{
            "description": "B",
            "balance": 1000,
            "balanceAvailable": 1000
        },
        {
            "description": "C",
            "balance": 1001,
            "balanceAvailable": 1001
        },
        {
            "description": "D",
            "balance": 1002,
            "balanceAvailable": 1002
        }],
        "cardPermissions": null,
        "totalBalanceAvailable": 1046.19
    }
}

@XmlRootElement(name = "customerInfo")
@XmlAccessorType(XmlAccessType.FIELD)
public class CustomerInfo {

    @XmlElement(name = "name")
    private String firstName;

    @XmlElement(name = "surname")
    private String lastName;

    @XmlElement
    private String customerId;

    @XmlElement
    private String email;

    @XmlElement
    private String cardPermissions; //This field has no getter and setter. I need it in order to parse correctly the JSON without the root node "customerInfo"

    @XmlElement
    private List<Account> accounts;

    public CustomerInfo() {

    }

    public CustomerInfo(String firstName, String lastName, String emailAddress) {

        this.firstName = firstName;
        this.lastName = lastName;
        this.email = emailAddress;
    }

    public String getFullName() {

        return firstName + " " + lastName;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public List<Account> getAccounts() {
        return accounts;
    }

    public void setAccounts(List<Account> accounts) {
        this.accounts = accounts;
    }

    public String getCustomerId() {
        return customerId;
    }

    public void setCustomerId(String customerId) {
        this.customerId = customerId;
    }
}

Answer 1

您有两个选择：

• 在批注@XmlElement
中将属性 required设置为 false
• 在所有其他字段的注释@XmlElement中为属性name设置一个值，然后删除不需要的字段。这样做，将忽略该字段。

更多和好的细节去这个旧的帖子。