MonetaryAmount JSR354 / moneta 的自定义 Json 序列化格式，如何正确注册序列化程序

Question

你好 Whosebug 专家

我有以下 InvoiceItem Class，其中包含金额

import jakarta.json.bind.annotation.JsonbProperty;
import jakarta.json.bind.annotation.JsonbTypeSerializer;
import jakarta.json.bind.serializer.JsonbSerializer;
import jakarta.json.bind.serializer.SerializationContext;
import jakarta.json.stream.JsonGenerator;
import jakarta.persistence.*;
import lombok.Getter;
import lombok.Setter;
import org.eclipse.persistence.annotations.UuidGenerator;
import org.javamoney.moneta.FastMoney;

@Entity
@UuidGenerator(name = "INVOICE_ITEM_GEN")
@Table(name = "invoice_items")
public class InvoiceItem {
    @Getter
    @Setter
    @jakarta.persistence.Id
    @JsonbProperty("id")
    @GeneratedValue(generator = "INVOICE_ITEM_GEN")
    private String Id;

    @Getter
    @Setter
    @Column(name = "name")
    @JsonbProperty("name")
    private String Name;

    @Getter
    @Setter
    @Convert(converter = PersistentFastMoney.class)
    @Column(name = "price")
    @JsonbProperty("price")
    private FastMoney Price;

    public InvoiceItem() {
    }

    public InvoiceItem(String name, String price) {
        this.setName(name);
        this.setPrice(FastMoney.parse(price));
    }
}

我从不同的输入在我的函数中成功生成了这个。

import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.POST;
import jakarta.ws.rs.Path;
import jakarta.ws.rs.Produces;
import jakarta.ws.rs.core.MediaType;

@Path("/invoices")
public class InvoiceSystem {

    @POST
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public Invoice CreateNewInvoice(InvoiceInput input) {
        var invoice = new Invoice();
        invoice.setCreditor(new InvoiceParty());
        for (var item: input.getItems()) {
            invoice.Items.add(item.toInvoiceItem());
        }

        return invoice;
    }
}

toInvoiceItem 使用带有两个字符串参数的 InvoiceItem 的构造函数。现在我想在创建后将 Class 作为 JSON 打印回消费者。

但这失败了

<body><h1>HTTP Status 500 - Internal Server Error</h1>
<hr/>
<p><b>type</b> Exception report</p>
<p><b>message</b>Internal Server Error</p>
<p><b>description</b>The server encountered an internal error that prevented it from fulfilling this request.</p>
<p><b>exception</b>
<pre>javax.servlet.ServletException: javax.json.bind.JsonbException: Unable to serialize property &#39;Items&#39; from com.openflowlabs.faktura.Invoice</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;Items&#39; from com.openflowlabs.faktura.Invoice</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;price&#39; from com.openflowlabs.faktura.InvoiceItem</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;context&#39; from org.javamoney.moneta.FastMoney</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;amountType&#39; from javax.money.MonetaryContext</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;annotatedInterfaces&#39; from java.lang.Class</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Unable to serialize property &#39;annotatedOwnerType&#39; from sun.reflect.annotation.AnnotatedTypeFactory.AnnotatedTypeBaseImpl</pre>
</p><p><b>root cause</b>
<pre>javax.json.bind.JsonbException: Error getting value on: javax.money.MonetaryAmount</pre>
</p><p><b>root cause</b>
<pre>java.lang.IllegalAccessException: class org.eclipse.yasson.internal.model.ReflectionPropagation cannot access class sun.reflect.annotation.AnnotatedTypeFactory$AnnotatedTypeBaseImpl &#40;in module java.base&#41; because module java.base does not export sun.reflect.annotation to unnamed module @50c1e8e3</pre>
</p><p><b>note</b> <u>The full stack traces of the exception and its root causes are available in the Payara Server
    5.2022.1 #badassfish logs.</u></p>
<hr/>
<h3>Payara Server 5.2022.1 #badassfish</h3></body>

我知道我需要一个自定义序列化程序，但我尝试了一天所有可能的方法来制作一个，但我的应用程序根本不会吃注释

如何为 org.javamoney.moneta.FastMoney Class 创建自定义序列化程序，以便我可以简单地用 @JsonbTypeSerializer(FastMoneySerializer.class) 注释所有具有此 class 的字段，例如发票项目

@Getter
@Setter
@Convert(converter = PersistentFastMoney.class)
@Column(name = "price")
@JsonbProperty("price")
@JsonbTypeSerializer(FastMoneySerializer.class)
private FastMoney Price;

这有可能吗？是否有一些关于我需要如何制作序列化程序的文档，所以它 returns JSON 像这样？

{
  "name": "Testing",
  "price": "CHF 20"
}

感谢您提供任何指示和/或解决方案，我真的被困住了，找不到关于如何使这些序列化程序工作的教程。如果您有一个带有良好文档的图书馆，那也会有所帮助。

Answer 1

好的，我找到了解决方案。

如果您想使用 jakarta.json，您的运行时需要支持它。我正在使用 Pyara，它说它支持 Jakarta EE9，但不知何故它不支持。切换到 GlassFish 解决了这个问题。正确的序列化器是这样完成的

package org.mypackage;

import jakarta.json.bind.serializer.JsonbSerializer;
import jakarta.json.bind.serializer.SerializationContext;
import jakarta.json.stream.JsonGenerator;
import org.javamoney.moneta.FastMoney;

public class FastMoneySerializer implements JsonbSerializer<FastMoney> {

    @Override
    public void serialize(FastMoney obj, JsonGenerator generator, SerializationContext ctx) {
        var str = obj.toString();
        generator.write(str);
    }
}

然后您可以将其添加到具有 FastMoney 类型的属性，如下所示：

package com.openflowlabs.faktura;

import jakarta.json.bind.annotation.JsonbAnnotation;
import jakarta.json.bind.annotation.JsonbProperty;
import jakarta.json.bind.annotation.JsonbTypeSerializer;
import jakarta.json.bind.serializer.JsonbSerializer;
import jakarta.json.bind.serializer.SerializationContext;
import jakarta.json.stream.JsonGenerator;
import jakarta.persistence.*;
import lombok.Getter;
import lombok.Setter;
import org.eclipse.persistence.annotations.UuidGenerator;
import org.javamoney.moneta.FastMoney;

@Entity
@UuidGenerator(name = "INVOICE_ITEM_GEN")
@Table(name = "invoice_items")
public class InvoiceItem {
    @Getter
    @Setter
    @jakarta.persistence.Id
    @JsonbProperty("id")
    @GeneratedValue(generator = "INVOICE_ITEM_GEN")
    private String Id;

    @Getter
    @Setter
    @Column(name = "name")
    @JsonbProperty("name")
    private String Name;

    @Getter
    @Setter
    @Convert(converter = PersistentFastMoney.class)
    @Column(name = "price")
    @JsonbProperty("price")
    @JsonbTypeSerializer(FastMoneySerializer.class)
    private FastMoney Price;

    public InvoiceItem() {
    }

    public InvoiceItem(String name, String price) {
        this.setName(name);
        this.setPrice(FastMoney.parse(price));
    }
}

MonetaryAmount JSR354 / moneta 的自定义 Json 序列化格式，如何正确注册序列化程序

Custom Json serialization format for MonetaryAmount JSR354 / moneta, How to register the Serializer properly

json

serialization

jakarta-ee

jax-rs

java-money