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 fields;

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

	public void setFields(List fields) {
		this.fields = fields;
		for (int i=0; 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 getEntriesList() {
		return entries.getEntryList();
	}

}

最后XML闪亮登场:

	
		
		
		
	

	
					multiple='false' />
		
		
		
		
		
	


	
					multiple='false' />
		
		

	

	
					  editable="false">

		
			
				
				
				
				
			
		

	

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。


[b][color=red]提供一个JAXB学习的地址:[url]http://jaxb.java.net/[/url][/color][/b]