wsimport工具在生成的客户端代码中转换DataHandler类型byte []

Question

我有一个使用JAXWS开发的简单WebService.我需要上传/下载一些文件.我创建了一个带有DataHandler属性的类FileItem.服务运行正常.

但是当我使用wsimport工具生成客户端存根时,FileItem类具有byte []类型属性而不是DataHandler类型.

如何自定义此行为,以便生成的代码在生成的客户端代码中也具有相同的DataHandler类型？

Answer 1

简答

如果指定一个xmime:expectedContentTypes:那就是除了任何的元素image/gif,image/jpeg,text/xml,或application/xml则生成的属性将是类型DataHandler.

答案很长

从章节H.2.1.1绑定JAXB 2.2规范的已知媒体类型,下面是mime类型如何对应于生成的Java类型.

MIME Type              Java Type
---------              -------------
image/gif              java.awt.Image
image/jpeg             java.awt.Image
text/xml               javax.xml.transform.Source
application/xml        javax.xml.transform.Source
any other mime type    javax.activation.DataHandler

XML Schema

下面是一个XML模式,它有许多类型的元素base64Binary,其中大多数都是合格的,xmime:expectedContentTypes这样我们就可以看到对生成的类生成的影响.

<?xml version="1.0"?>
<xsd:schema
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:xmime="http://www.w3.org/2005/05/xmlmime"
    xmlns="http://www.example.com"
    targetNamespace="http://www.example.com">
    <xsd:element name="root">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element minOccurs="0" name="default" type="xsd:base64Binary"/>
                <xsd:element minOccurs="0" name="imageGif" type="xsd:base64Binary" xmime:expectedContentTypes="image/gif"/>
                <xsd:element minOccurs="0" name="imageJpeg" type="xsd:base64Binary" xmime:expectedContentTypes="image/jpeg"/>
                <xsd:element minOccurs="0" name="textXml" type="xsd:base64Binary" xmime:expectedContentTypes="text/xml"/>
                <xsd:element minOccurs="0" name="applicationXml" type="xsd:base64Binary" xmime:expectedContentTypes="application/xml"/>
                <xsd:element minOccurs="0" name="anythingElse" type="xsd:base64Binary" xmime:expectedContentTypes="anything/else"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
</xsd:schema>

根(生成的类)

下面是生成的类.得到的属性类型byte[],Image,Source,和DataHandler.

package com.example;

import java.awt.Image;
import javax.activation.DataHandler;
import javax.xml.bind.annotation.*;
import javax.xml.transform.Source;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "_default",
    "imageGif",
    "imageJpeg",
    "textXml",
    "applicationXml",
    "anythingElse"
})
@XmlRootElement(name = "root")
public class Root {

    @XmlElement(name = "default")
    protected byte[] _default;
    @XmlMimeType("image/gif")
    protected Image imageGif;
    @XmlMimeType("image/jpeg")
    protected Image imageJpeg;
    @XmlMimeType("text/xml")
    protected Source textXml;
    @XmlMimeType("application/xml")
    protected Source applicationXml;
    @XmlMimeType("anything/else")
    protected DataHandler anythingElse;


    ...
}