JSON 序列化时的 jsonrpc4j null

Question

我从下面的 class CleengAPI.java 中的 jsonrpc4j 得到一个 null 错误，方法 rpc.listCustomers(publisherToken, offset, limit);被调用以序列化以下客户 JSON 列表，该列表由 jsonrpc4j 正确下载并显示在调试语句中，但 JSON 未有效序列化导致空错误。

客户名单JSON

{
    "result": [
        {
            "email": "",
            "firstName": "xx",
            "lastName": "xx",
            "dateOfBirth": "",
            "country": "US",
            "companyName": "",
            "phoneNumber": "",
            "addressLine1": null,
            "addressLine2": null,
            "city": null,
            "state": null,
            "postalCode": null,
            "regDate": "2019-12-24 07:06:46",
            "lastLoginDate": "2019-12-24 07:06:46",
            "transactions": "",
            "payment": "",
            "termsAccepted": "no",
            "marketingOptIn": "no",
            "lastUserIp": "xx.xx.x.x"
        },
        {
            "email": "11@gmail.com",
            "firstName": "xx",
            "lastName": "xx",
            "dateOfBirth": "",
            "country": "US",
            "companyName": "",
            "phoneNumber": "",
            "addressLine1": null,
            "addressLine2": null,
            "city": null,
            "state": null,
            "postalCode": null,
            "regDate": "2019-02-12 02:10:57",
            "lastLoginDate": "2019-03-19 17:10:28",
            "transactions": "1",
            "payment": "visa",
            "termsAccepted": "no",
            "marketingOptIn": "yes",
            "lastUserIp": "xxx.xxx.xx.x"
        }
    ],
    "id": "854190206",
    "error": null,
    "jsonrpc": "2.0"
}

Class CleengAPI

import java.net.MalformedURLException;
import java.net.URL;

import com.googlecode.jsonrpc4j.JsonRpcHttpClient;
import com.googlecode.jsonrpc4j.JsonRpcParam;
import com.googlecode.jsonrpc4j.ProxyUtil;
import com.jahtoe.getner.domain.AccessStatus;
import com.jahtoe.getner.domain.Items;
import com.jahtoe.getner.domain.ListCustomers;
import com.jahtoe.getner.domain.ListCustomerSubscription;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CleengApi {

    private CleengRpc rpc;
    public static final Logger LOG = LoggerFactory.getLogger(CleengApi.class);

    private interface CleengRpc {

        Items<ListCustomers> listCustomers(
                @JsonRpcParam(value = "publisherToken") String publisherToken,
                @JsonRpcParam(value = "offset") int offset,
                @JsonRpcParam(value = "limit") int limit);

    }

    public CleengApi() throws MalformedURLException {
        makeRpc("https://api.cleeng.com/3.0/json-rpc");
    }

    private void makeRpc(String apiUrl) throws MalformedURLException {
        JsonRpcHttpClient client = new JsonRpcHttpClient(new URL(apiUrl));
        rpc = ProxyUtil.createClientProxy(getClass().getClassLoader(), CleengRpc.class, client);
    }

    public Items<ListCustomers> ListCustomer(String publisherToken, int offset, int limit) {
        return rpc.listCustomers(publisherToken, offset, limit);
    }    

}

Class ListCustomers 进行序列化 JSON

import java.io.Serializable;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.map.annotate.JsonSerialize;
@JsonIgnoreProperties(ignoreUnknown = true)

@JsonSerialize(include=JsonSerialize.Inclusion.NON_EMPTY)
public class ListCustomers implements Serializable {

    private static final long serialVersionUID = 1L;
    public String email;
    public String firstName;
    public String lastName;
    public String dateOfBirth;
    public String country;
    public String companyName;
    public String phoneNumber;
    public Object addressLine1;
    public Object addressLine2;
    public Object city;
    public Object state;
    public Object postalCode;
    public String regDate;
    public String lastLoginDate;
    public String transactions;
    public String payment;
    public String termsAccepted;
    public String marketingOptIn;
    public String lastUserIp;
}

用于创建 CleanAPI 并执行 ListCustomers 下载和序列化的代码段

CleengApi api = new 
allListCustomer = api.ListCustomer(publisherToken, 0, 50);

POM.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.jahtoe.XX</groupId>
    <artifactId>XX</artifactId>
    <version>1</version>
    <packaging>jar</packaging>

    <name>GregGetner</name>
    <description>ETL: Cleeng to Zapier</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.briandilley.jsonrpc4j</groupId>
            <artifactId>jsonrpc4j</artifactId>
            <version>1.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>    
</project>

项Class

package com.cleeng.apiv3.domain;

import java.io.Serializable;

public class Items<X> implements Serializable {

    private static final long serialVersionUID = 1L;

    public int totalItemCount;
    public java.util.Vector<X> items;
}

我不确定如何调试它，因为消息只是一个词 null

如有任何帮助，我们将不胜感激。

问候康特

Answer 1

所以发生的事情是 API 返回的 JSON 的以下样式需要项目 class

{
    "result": {
        "items": [{
            "offerId": "S321834685_US",
            "status": "active",
            "expiresAt": 15869957,
            "nextPaymentPrice": 79,
            "nextPaymentCurrency": "USD",
            "paymentGateway": "adyen",
            "paymentMethod": "visa"
        }],
        "totalItemCount": 1
    },
    "id": "299789347",
    "error": null,
    "jsonrpc": "2.0"
}

但是这种样式需要一个列表。我正在使用这种样式的项目，这会导致空值。

{
    "result": [
        {
            "email": "",
            "firstName": "vvv",
            "lastName": "wwwww",
            "dateOfBirth": "",
            "country": "US",
            "companyName": "",
            "phoneNumber": "",
            "addressLine1": null,
            "addressLine2": null,
            "city": null,
            "state": null,
            "postalCode": null,
            "regDate": "2019-12-24 07:06:46",
            "lastLoginDate": "2019-12-24 07:06:46",
            "transactions": "",
            "payment": "",
            "termsAccepted": "no",
            "marketingOptIn": "no",
            "lastUserIp": "xx.xxx.xxx.xxx"
        },

JSON 序列化时的 jsonrpc4j null

jsonrpc4j null on JSON serialization

java

json

jackson

jsonrpc4j