使用jaxb将XML转化为JAVA BEAN

直接贴代码了，其中的参数的意思，自己查查就知道了，或者用一下就明白了。

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;

@XmlRootElement(name="module")
public class Module extends Metadata{
	
	@XmlAttribute(name="name")
	public String name;
	
	@XmlAttribute(name="template")
	public String template;
	
	@XmlElement
	public Resources resources;
	
	@XmlElement
	public HeaderItems headerItems;
	
	@XmlElement
	public Properties properties;
	
	@XmlElement
	public BodyItems bodyItems;

	@XmlTransient
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	@XmlTransient
	public String getTemplate() {
		return template;
	}

	public void setTemplate(String template) {
		this.template = template;
	}

	@XmlTransient
	public Resources getResources() {
		return resources;
	}

	public void setResources(Resources resources) {
		this.resources = resources;
	}

	@XmlTransient
	public HeaderItems getHeaderItems() {
		return headerItems;
	}

	public void setHeaderItems(HeaderItems headerItems) {
		this.headerItems = headerItems;
	}

	@XmlTransient
	public Properties getProperties() {
		return properties;
	}

	public void setProperties(Properties properties) {
		this.properties = properties;
	}

	@XmlTransient
	public BodyItems getBodyItems() {
		return bodyItems;
	}

	public void setBodyItems(BodyItems bodyItems) {
		this.bodyItems = bodyItems;
	}
}

Moduel对象其中一个对象属性:

import java.util.List;

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;

public class HeaderItems extends Metadata {
	
	@XmlElement(name="field")
	private List<Field> fields;

	@XmlTransient
	public List<Field> getFields() {
		return fields;
	}

	public void setFields(List<Field> fields) {
		this.fields = fields;
		for (int i=0; i<fields.size(); i++)
			fields.get(i).setHeaderItem(true);
	} 
	
	public void clear() {
		fields.clear();
	}
	
}

package com.morningstar.wfe.metadata.node;

import java.util.List;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlTransient;

public class Map extends Datasource {
	@XmlAttribute(name="name")
	public String name;
	
	@XmlAttribute(name="type")
	public String type;

	@XmlAttribute(name="url")
	public String url;
	
	@XmlElement
	public Entries entries;

	public void setName(String name) {
		this.name = name;
	}
	public void setType(String type) {
		this.type = type;
	}
	public void setEntries(Entries entries) {
		this.entries = entries;
	}
	
	@XmlTransient
	public String getName() {
		return name;
	}
	
	@XmlTransient
	public String getType() {
		return type;
	}
	
	@XmlTransient
	public Entries getEntries() {
		return this.entries;
	}
	
	@XmlTransient
	public String getUrl() {
		return url;
	}
	public void setUrl(String url) {
		this.url = url;
	}
	
	public int size() {
		if (entries == null) return 0;
		
		return entries.size();
	}
		
	public Entry get(int index) {
		if (entries == null) return null;
		
		return entries.get(index);
	}
	
	
	public List<Entry> getEntriesList() {
		return entries.getEntryList();
	}
	
}

最后XML闪亮登场:

<?xml version="1.0" encoding="UTF-8"?>

<module name='showcase' template='showcase.ftl'>
	<resources>
		<map name='css' type='static'>
			<entries>
				<entry label="text_a1" value="text_a1"></entry>
				<entry label="text_a2" value="text_a2"></entry>
				<entry label="text_a3" value="text_a3"></entry>
				<entry label="text_c1" value="text_c1"></entry>
				<entry label="text_c2" value="text_c2"></entry>
			</entries>
		</map>
		<map name='status' type='ws' url="xxxx">
		</map>
		<map name='author' type='file' url="xxxx">
		</map>
	</resources>

	<headerItems>
		<field name='active1' type='checkbox' datasource='css'
			multiple='false' />
		<field name='title1' type='text' format="string" required="true"/>
		<field name='radio11' type='radio' datasource='css'/>
		<field name='url11' type='url' format="string"/>
		<field name='dropdownlist111' type='select' datasource='css' multiple="true" height="80" width="100"/>
		<field name='title22' type='textarea' width="200" height="100" spellCheck="true" format="string" required="true"/>
	</headerItems>

	
	<properties>
		<field name='active12' type='checkbox' datasource='status'
			multiple='false' />
		<field name='title12' type='date' format="int" />
		<field name='email11' type='email' visible="true" />
		
	</properties>

	<bodyItems>
		<field label="Name" name="name" type="text" visible="false"
			  editable="false"></field>
		
		<field name="readings_list" type="datatable" action="insert,remove">
			<columns>
				<field label="Title" name="rSource" type="text" visible="true" width="30"/>
				<field label="URL" name="rURL" type="text" visible="true" width="40"/>
				<field label="Date" name="rDate" type="text" visible="true" width="50"/>
				<field label="Source" name="rSource" type="text" visible="true" width="60"/>
			</columns>
		</field>
		
	</bodyItems>

</module>

Metadata是一个抽象类，描述了些 ID NAME VALUE基本属性 没什么特别的

关于XML转java对象的操作：

public static Module parse(String metadata) throws MetadataParserException {
		Module module = null;
		try {
			JAXBContext jaxbContext = JAXBContext.newInstance(Module.class);
			Unmarshaller um = jaxbContext.createUnmarshaller();
			module = (Module)um.unmarshal(new ByteArrayInputStream(metadata.getBytes()));
		} catch (JAXBException e) {
			log.warn("JAXB castor failed to convert the metadata to module instance by {}",e.getMessage());
			throw new MetadataParserException();
		}
		return module;
	}

这样的话传进XML的字符串，就可以解析出这个JAVA对象。完全不用写任何过多的代码。岂不爽哉？！！！！

附一个java bean <=> xml 的unmi同志原创文档，主要是比较Jaxb和castor。


提供一个JAXB学习的地址:http://jaxb.java.net/