我们尝试使用 gradle、xsd 和 xjc 生成 JAXB 类，并且 JAXB 类应该具有 XmlRootElement 注释，以便它可以用于公开为 Web 服务响应。我们正在关注此链接 http://azagorneanu.blogspot.com/2011/09/configure-maven-to-generate-classes.html ，它有很大帮助，但我们无法找到一个仅使用 gradle 的特定示例。所以我们想出了一些我们将作为答案分享的东西。

最佳答案

build.gradle 应该如下所示

    buildscript {
    repositories {
    mavenCentral()
        jcenter()
    }
    dependencies {
        classpath "net.saliman:gradle-cobertura-plugin:2.2.4"
        classpath 'com.github.jacobono:gradle-jaxb-plugin:1.3.5'

    }
}
apply plugin: 'com.github.jacobono.jaxb'
dependencies {
    jaxb 'com.sun.xml.bind:jaxb-xjc:2.2.7'
    jaxb "org.jvnet.jaxb2_commons:jaxb2-basics-ant:0.6.5"
    jaxb "org.jvnet.jaxb2_commons:jaxb2-basics:0.6.4"
    jaxb "org.jvnet.jaxb2_commons:jaxb2-basics-annotate:0.6.4"
}
configurations {
    jaxb
}
task jaxb(){
    description 'Converts xsds to classes'
    def jaxbTargetDir = file("generated")
    doLast {
    jaxbTargetDir.mkdirs()
    ant.taskdef(name: 'xjc', classname: 'org.jvnet.jaxb2_commons.xjc.XJC2Task', classpath: configurations.jaxb.asPath)
    ant.jaxbTargetDir = jaxbTargetDir 
    ant.xjc(destdir: '${jaxbTargetDir}', package: 'com.sample.jaxbclasses', schema:'generated/schema.xsd', binding:'generated/binding.xjb', extension:'true'){
        arg(value: "-Xannotate")
        }
    }
}

架构.xsd

    <xs:element name="user" type="user" />
    <xs:element name="userList" type="userList" />

    <xs:complexType name="user">
        <xs:all>
            <xs:element name="id" type="xs:long" minOccurs="0" />
            <xs:element name="name" type="xs:string" />
            <xs:element name="registrationDate" type="xs:dateTime" />
        </xs:all>
    </xs:complexType>

    <xs:complexType name="userList">
        <xs:sequence>
            <xs:element name="user" type="user" minOccurs="0" maxOccurs="unbounded" />
        </xs:sequence>
    </xs:complexType>

</xs:schema>

绑定(bind).xjb

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<jaxb:bindings xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:annox="http://annox.dev.java.net" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd"
    version="2.1">
    <jaxb:globalBindings>
        <!-- Use java.util.Calendar instead of javax.xml.datatype.XMLGregorianCalendar for xs:dateTime -->
        <jaxb:javaType name="java.util.Calendar" xmlType="xs:dateTime"
                parseMethod="javax.xml.bind.DatatypeConverter.parseDateTime" 
                printMethod="javax.xml.bind.DatatypeConverter.printDateTime" />

        <!-- Force all classes implements Serializable -->
        <xjc:serializable uid="1" />
    </jaxb:globalBindings>

    <!-- Annotate the following classes with XmlRootElement -->
    <jaxb:bindings schemaLocation="schema.xsd" node="/xs:schema">
        <jaxb:bindings node="xs:complexType[@name='user']">
            <annox:annotate>
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement" name="user" />
            </annox:annotate>
        </jaxb:bindings>
        <jaxb:bindings node="xs:complexType[@name='userList']">
            <annox:annotate>
                <annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement" name="userList" />
            </annox:annotate>
        </jaxb:bindings>
    </jaxb:bindings>
</jaxb:bindings>

也可以使用下面的 binding.xjb

<?xml version="1.0"?>
<jxb:bindings version="1.0" xmlns:jxb="http://java.sun.com/xml/ns/jaxb" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc" jxb:extensionBindingPrefixes="xjc" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <jxb:bindings schemaLocation="schema.xsd" node="/xs:schema">
    <jxb:globalBindings>
      <xjc:simple />
    </jxb:globalBindings>
  </jxb:bindings>
</jxb:bindings>

现在您可以运行任务“jaxb”，一切就绪。 干杯!

用户.java

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.7 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2017.01.26 at 11:59:18 AM EST 
//


package com.sample.jaxbclasses;

import java.io.Serializable;
import java.util.Calendar;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;


/**
* <p>Java class for user complex type.
* 
 * <p>The following schema fragment specifies the expected content contained within this class.
* 
 * <pre>
* &lt;complexType name="user">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;all>
*         &lt;element name="id" type="{http://www.w3.org/2001/XMLSchema}long" minOccurs="0"/>
*         &lt;element name="name" type="{http://www.w3.org/2001/XMLSchema}string"/>
*         &lt;element name="registrationDate" type="{http://www.w3.org/2001/XMLSchema}dateTime"/>
*       &lt;/all>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
* 
 * 
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "user", propOrder = {

})
@XmlRootElement(name = "user")
public class User
    implements Serializable
{

    private final static long serialVersionUID = 1L;
    protected Long id;
    @XmlElement(required = true)
    protected String name;
    @XmlElement(required = true, type = String.class)
    @XmlJavaTypeAdapter(Adapter1 .class)
    @XmlSchemaType(name = "dateTime")
    protected Calendar registrationDate;

    /**
     * Gets the value of the id property.
     * 
     * @return
     *     possible object is
     *     {@link Long }
     *     
     */
    public Long getId() {
        return id;
    }

    /**
     * Sets the value of the id property.
     * 
     * @param value
     *     allowed object is
     *     {@link Long }
     *     
     */
    public void setId(Long value) {
        this.id = value;
    }

    /**
     * Gets the value of the name property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getName() {
        return name;
    }

    /**
     * Sets the value of the name property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setName(String value) {
        this.name = value;
    }

    /**
     * Gets the value of the registrationDate property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public Calendar getRegistrationDate() {
        return registrationDate;
    }

    /**
     * Sets the value of the registrationDate property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setRegistrationDate(Calendar value) {
        this.registrationDate = value;
    }

}

关于java - 如何使用 gradle、jaxb 和 xjc 从 xsd 生成 jaxb 类，类应该有 XmlRootElement，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41880496/