将XML实体映射到Java对象 [英] Mapping XML Entities to Java Objects

问题描述

我很确定，这是围绕XML到Java Object转换的许多重复问题之一。
但是我开始这个帖子因为我找不到更简单或者寻找更简单的解决方案。

I am quite sure, this is one of the many duplicated questions around XML to Java Object conversions. But I started this thread since I couldn't find simpler or looking for simpler solution.

我有一个xsd [我正在设计它]和xml 。
我想根据映射将xml数据自动映射到Java bean

I have an xsd [Infact I am designing it] and xml. I would like to auto-map the xml data to Java beans as per mapping

<tns:SummaryCart xmlns:tns="SummaryCart" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="SummaryCart.xsd">
    <SummaryElement type="test">
        <order>1</order>
        <id>A</id>
        <displayName>A</displayName>
        <subElements>
            <order>1</order>
            <id>Preactivation</id>
            <displayName>Preactivation</displayName>
        </subElements>
        <maxlines>1</maxlines>
    </SummaryElement>
</tns:SummaryCart>

现在我的Java课程将

Now my Java classes will be

public class SummaryCart{
    private List<SummaryElement> summaryElementList;
}
public class SummaryElement {
    private int order;
    private String id;
    private String displayName;
    private String property;
    private List<SummaryElement> subElements;
    private int maxlines;
    private String type;
}

是否有任何可以自动映射XML数据的简单工具/框架到Java bean [必须支持属性/元素映射]。教程会很好。

Is there any simple tool/framework which can auto-map the data from XML to Java beans [MUST support attributes/element mapping]. Tutorial will be good.

顺便说一下，我正在使用Spring框架，如果采用spring-oxm优势，欢迎它。

Btw, I am using Spring framework, if spring-oxm advantage is taken, its welcome.

推荐答案

以下是使用 <将对象映射到XML的方法strong> JAXB（JSR-222） 。从Java SE 6开始，JDK / JRE中包含一个实现.Spring支持JAXB（参见第8.5节： http://static.springsource.org/spring-ws/site/reference/html/oxm.html ）

SummaryCart

import java.util.List;
import javax.xml.bind.annotation.*;

@XmlRootElement(name="SummaryCart", namespace="SummaryCart")
@XmlAccessorType(XmlAccessType.FIELD)
public class SummaryCart{

    @XmlElement(name="SummaryElement")
    private List<SummaryElement> summaryElementList;

}

摘要元素

import java.util.List;
import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class SummaryElement {

    private int order;
    private String id;
    private String displayName;
    private String property;
    private List<SummaryElement> subElements;
    private int maxlines;

    @XmlAttribute
    private String type;

}

演示

import java.io.File;
import javax.xml.bind.*;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(SummaryCart.class);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        File xml = new File("src/forum15881876/input.xml");
        SummaryCart sc = (SummaryCart) unmarshaller.unmarshal(xml);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.setProperty(Marshaller.JAXB_SCHEMA_LOCATION, "SummaryCart.xsd");
        marshaller.marshal(sc, System.out);
    }

}

input.xml /输出

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns2:SummaryCart xmlns:ns2="SummaryCart" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="SummaryCart.xsd">
    <SummaryElement type="test">
        <order>1</order>
        <id>A</id>
        <displayName>A</displayName>
        <subElements>
            <order>1</order>
            <id>Preactivation</id>
            <displayName>Preactivation</displayName>
            <maxlines>0</maxlines>
        </subElements>
        <maxlines>1</maxlines>
    </SummaryElement>
</ns2:SummaryCart>

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