問題描述

我正在嘗試從 XSD 模式生成一些 Java 類.我確切地知道我想用 Java 生成什么，我正在嘗試編寫相應的 XSD 架構.

I am trying to generate some Java class from XSD schema. I know exactly what I want to generate in Java, and I'm trying to write the corresponding XSD schema.

我需要表示一個 java.util.HashMap (HashMap).我找不到如何在 XSD 模式(或 xjb 綁定文件)中指定我想要 Java 中的 HasMap.它總是生成一個列表..

I need to represent a java.util.HashMap (HashMap). I can't find how to specify in the XSD schema (or xjb binding file) that I want an HasMap in Java. It always generate a List..

這里是我要生成的代碼

    @XmlAccessorType(XmlAccessType.FIELD)
    @XmlType(name = "ErrorMessage", propOrder = { "name", "details"})
    public class ErrorMessage {
        @XmlElement(required = true)
        protected String name;
        @XmlElement(required = false)
        protected java.util.Map<String, String> details = new HashMap<String, String>();

我試過這個:

    <xsd:complexType name="ErrorMessage">
    <xsd:sequence>
        <xsd:element name="name" type="xsd:string" />
        <xsd:element name="details" type="map" />
    </xsd:sequence>
</xsd:complexType>


<xsd:complexType name="map">
    <xsd:sequence>
        <xsd:element name="mapEntry" type="mapEntry" minOccurs="0" maxOccurs="unbounded" />
    </xsd:sequence>
</xsd:complexType>

<xsd:complexType name="mapEntry">
    <xsd:sequence>
        <xsd:element name="key" type="xsd:string" />
        <xsd:element name="value" type="xsd:string" />
    </xsd:sequence>
</xsd:complexType>

但它還是會繼續生成一個mapEntry的java.util.List:

But it still continue to generate a java.util.List of mapEntry:

在我的錯誤"課程中:受保護的地圖詳情 = new Map();

In my "Error" class: protected Map details = new Map();

代替

protected java.util.Map<String, String> details = new HashMap<String, String>();

而生成的地圖"類是:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "map", propOrder = {"mapEntry"})
public class Map {
     protected List<MapEntry> mapEntry;

我真的需要為我的應用程序使用地圖.知道我該怎么做嗎?

I really need to use a map for my application. Any idea about how I can do ?

注意:我也嘗試過使用 Oracle owi:hasmp 但出現命名空間錯誤.

Note: I have also tried to use Oracle owi:hasmp but got a namespace error.

xmlns:owi="http://www.oracle.com/webservices/internal" (also tried with xmlns:owi="http://www.oracle.com/webservices/internal/literal")

包含在我的架構聲明中

我的詳細信息"元素聲明如下

and my "details" element declared as below

<xsd:element name="details" type="owi:hashmap" />

錯誤是:

src-resolve.4.2:解析組件owi:hasmap"時出錯.它是檢測到owi:hasmap"在命名空間中
'http://www.oracle.com/webservices/internal'，但是來自這個的組件命名空間不可從架構文檔中引用'文件://myFile.xsd.如果這是不正確的命名空間，也許'owi:hasmap' 的前綴需要更改.如果這是正確的命名空間，然后應添加適當的導入"標簽'file://myFile.xsd

src-resolve.4.2: Error resolving component 'owi:hasmap'. It was detected that 'owi:hasmap' is in namespace
'http://www.oracle.com/webservices/internal', but components from this namespace are not referenceable from schema document 'file://myFile.xsd. If this is the incorrect namespace, perhaps the prefix of 'owi:hasmap' needs to be changed. If this is the correct namespace, then an appropriate 'import' tag should be added to 'file://myFile.xsd

并且它不能將owi:hasmap"關聯到任何類型定義組件.

And it can not associate "owi:hasmap" to any type definition component.

有什么想法嗎?

推薦答案

是的，地圖由 jaxb 無縫處理，但只有一種方式.

Yes, maps are handled seamlessly by jaxb, but only in one way.

這里描述了解決方案:

http://todayguesswhat.blogspot.co.uk/2012/09/jaxb-xsd-to-java-maphashmap-example.html

但是如果你已經有一個可以正確映射的類，那就很麻煩了.為什么要從 XSD 重新生成它?

But it is a lot of hassle if you already have a class that maps correctly. Why do you want to regenerate it from XSD?

這篇關于XSD 轉 Java，指定使用 Java HashMap的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！