Json Array到Pojo [英] Json Array to Pojo

问题描述

我正在尝试将以下Json数组响应解组为RestTemplate中的pojos集合。

I'm trying to unmarshal the following Json array response to a collection of pojos in RestTemplate.

[{
  "client":{
        "id": 6364,
        "name": "7Seven7 Insurance Inc",
        "email": "[e-mail]",
        "currency": {"name":"United States of America, Dollars","symbol":"$"},
        "address": "941 Elm Ave. #5 ",
        "city": "Long Beach",
        "province": "CA",
        "zip_code": "90813",
        "country": "United States",
        "full_address_with_comma": "941 Elm Ave. #5, Long Beach, CA, 90813, United States",
        "phone": "562-556-4035",
        "fax":"562-381-7500",
        "custom_field_name": "listed",
        "custom_field_value": "false",
        "created_at": "2010-07-18T00:08:10Z",
        "updated_at": "2010-07-21T11:04:58Z",
      }
},
{
  "client":{
        "id":6365,
        "name": "Affinity",
        "email":"[e-mail]",
        "address":"2575 Vista Del Mar ",
        "city":"Ventura",
        "province":"California",
        "zip_code":"93001",
        "country":"United States",
        "full_address_with_comma":"2575 Vista Del Mar, Ventura, California, 93001, United States",
        "phone":"[phone]",
        "fax":null,
        "currency":{"name":"United States of America, Dollars","symbol":"$"},
        "custom_field_name":null,
        "custom_field_value":null
        "created_at":"2010-07-18T00:08:10Z",
        "updated_at":"2010-07-18T00:08:10Z",
      }
}]

我创建了一个相应的Java Pojo类

I have created a corresponding Java Pojo class

public class Client {
@JsonProperty("id")
private String id;
@JsonProperty("name")
private String name;
@JsonProperty("currency")
private String currency;
@JsonProperty("address")
private String address;
@JsonProperty("city")
private String city;
@JsonProperty("province")
private String province;
@JsonProperty("zip_code")
private String zip_code;
@JsonProperty("country")
private String country;
@JsonProperty("full_address_with_comma")
private String full_address_with_comma;
@JsonProperty("phone")
private String phone;
@JsonProperty("fax")
private String fax;
@JsonProperty("custom_field_name")
private String custom_field_name;
@JsonProperty("custom_field_value")
private String custom_field_value;
@JsonProperty("created_at")
private String created_at;
@JsonProperty("updated_at")
private String updated_at;

public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getCurrency() {
    return currency;
}
public void setCurrency(String currency) {
    this.currency = currency;
}
public String getAddress() {
    return address;
}
public void setAddress(String address) {
    this.address = address;
}
public String getCity() {
    return city;
}
public void setCity(String city) {
    this.city = city;
}
public String getProvince() {
    return province;
}
public void setProvince(String province) {
    this.province = province;
}
public String getZip_code() {
    return zip_code;
}
public void setZip_code(String zip_code) {
    this.zip_code = zip_code;
}
public String getCountry() {
    return country;
}
public void setCountry(String country) {
    this.country = country;
}
public String getFull_address_with_comma() {
    return full_address_with_comma;
}
public void setFull_address_with_comma(String full_address_with_comma) {
    this.full_address_with_comma = full_address_with_comma;
}
public String getPhone() {
    return phone;
}
public void setPhone(String phone) {
    this.phone = phone;
}
public String getFax() {
    return fax;
}
public void setFax(String fax) {
    this.fax = fax;
}
public String getCustom_field_name() {
    return custom_field_name;
}
public void setCustom_field_name(String custom_field_name) {
    this.custom_field_name = custom_field_name;
}
public String getCustom_field_value() {
    return custom_field_value;
}
public void setCustom_field_value(String custom_field_value) {
    this.custom_field_value = custom_field_value;
}
public String getCreated_at() {
    return created_at;
}
public void setCreated_at(String created_at) {
    this.created_at = created_at;
}
public String getUpdated_at() {
    return updated_at;
}
public void setUpdated_at(String updated_at) {
    this.updated_at = updated_at;
}

}

我正在使用RestTemplate，但我有一组具有空属性值的客户端。

I'm using RestTemplate, but I have got an array of clients with empty attribute values.

Client[] clients= restTemplate.getForObject(requestUrl, Client[].class);

推荐答案

您的大部分POJO字段都是<$ c类型$ c> String 但是你的JSON的值没有双引号（）。您的JSON应如下有效：

Most of your POJO fields are of type String but your JSON has values without double quotes (""). Your JSON should be as follows to be valid:

[
    {
        "client": {
            "id": "6364",
            "name": "7Seven7 Insurance Inc",
            "email": "[e-mail]",
            "currency": {
                "name": "United States of America, Dollars",
                "symbol": "$"
            },
            "address": "941 Elm Ave. #5 ",
            "city": "Long Beach",
            "province": "CA",
            "zip_code": "90813",
            "country": "United States",
            "full_address_with_comma": "941 Elm Ave. #5, Long Beach, CA, 90813, United States",
            "phone": "562-556-4035",
            "fax": "562-381-7500",
            "custom_field_name": "listed",
            "custom_field_value": "false",
            "created_at": "2010-07-18T00:08:10Z",
            "updated_at": "2010-07-21T11:04:58Z"
        }
    },
    {
        "client": {
            "id": "6365",
            "name": "Affinity",
            "email": "[e-mail]",
            "address": "2575 Vista Del Mar ",
            "city": "Ventura",
            "province": "California",
            "zip_code": "93001",
            "country": "United States",
            "full_address_with_comma": "2575 Vista Del Mar, Ventura, California, 93001, United States",
            "phone": "[phone]",
            "fax": "null",
            "currency": {
                "name": "United States of America, Dollars",
                "symbol": "$"
            },
            "custom_field_name": "null",
            "custom_field_value": "null",
            "created_at": "2010-07-18T00:08:10Z",
            "updated_at": "2010-07-18T00:08:10Z"
        }
    }
]

另外，你r JSON有电子邮件字段，但您的客户 POJO没有电子邮件字段，并且您在POJO中声明的货币字段不是字符串，它是一个包含两个字段的对象，所以你的客户 POJO应该是：

Also, your JSON has an email field but your Client POJO has not email field, and your declared currency field in the POJO is not a String, it's an object with two fields, so your Client POJO should be:

public class Client {

    private String id;
    private String name;
    private String email;
    private Currency currency;
    private String address;
    private String city;
    private String province;
    private String zip_code;
    private String country;
    private String full_address_with_comma;
    private String phone;
    private String fax;
    private String custom_field_name;
    private String custom_field_value;
    private String created_at;
    private String updated_at;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Currency getCurrency() {
        return currency;
    }

    public void setCurrency(Currency currency) {
        this.currency = currency;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    public String getProvince() {
        return province;
    }

    public void setProvince(String province) {
        this.province = province;
    }

    public String getZip_code() {
        return zip_code;
    }

    public void setZip_code(String zip_code) {
        this.zip_code = zip_code;
    }

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public String getFull_address_with_comma() {
        return full_address_with_comma;
    }

    public void setFull_address_with_comma(String full_address_with_comma) {
        this.full_address_with_comma = full_address_with_comma;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getFax() {
        return fax;
    }

    public void setFax(String fax) {
        this.fax = fax;
    }

    public String getCustom_field_name() {
        return custom_field_name;
    }

    public void setCustom_field_name(String custom_field_name) {
        this.custom_field_name = custom_field_name;
    }

    public String getCustom_field_value() {
        return custom_field_value;
    }

    public void setCustom_field_value(String custom_field_value) {
        this.custom_field_value = custom_field_value;
    }

    public String getCreated_at() {
        return created_at;
    }

    public void setCreated_at(String created_at) {
        this.created_at = created_at;
    }

    public String getUpdated_at() {
        return updated_at;
    }

    public void setUpdated_at(String updated_at) {
        this.updated_at = updated_at;
    }

    public String getEmail() {
        return email;
    }

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

}

新货币对象：

public class Currency {

    private String name;
    private String symbol;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getSymbol() {
        return symbol;
    }
    public void setSymbol(String symbol) {
        this.symbol = symbol;
    }

}

另一方面，你是尝试反序列化 Client 对象的数组，但您的JSON是一个对象数组，其中每个对象包含一个 Client 对象，所以你需要包装它：

On the other hand, you are trying to deserialize an array of Client objects, but your JSON is an array of objects where each object contains a Client object, so you need to wrap it:

public class Cliente {

    private Client client;

    public Client getClient() {
        return client;
    }

    public void setClient(Client client) {
        this.client = client;
    }

}

然后你可以反序列化你的JSON使用 restTemplate 或使用 ObjectMapper 。

使用 restTemplate ：

and then you could deserialize your JSON with the restTemplate or with an ObjectMapper.
With a restTemplate:

Cliente[] clients= restTemplate.getForObject(requestUrl, Cliente[].class);

使用 ObjectMapper （杰克逊 genericMessageConverter 完全相同，它使用 ObjectMapper ，如下所示：

With an ObjectMapper (Jackson's genericMessageConverter does exactly the same, it uses an ObjectMapper as follows):

Cliente[] clientes= mapper.readValue(jsonStr, Cliente[].class);

另一件事是，你不需要 @JsonProperty 注释。

Another thing is, you do not need the @JsonProperty annotations in your POJO if your JSON fields have the same name in the JSON and in the POJO.

这篇关于Json Array到Pojo的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！