jaxb实现java对象与xml之间转换_Jaxb实现Java对象与XML之间的转换
[JAXB(Java Architecture for XML Binding ) 是一个业界的标准，是一项可以根据XML Schema产生Java类的技术。该过程中，JAXB也提供了将XML实例文档反向生成Java对象树的方
Jaxb核心代码：
package ie.swing.xml.parse;
import ie.swing.xml.model.Components;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.OutputStream;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
/**
* 组件配置文件解析
*
* @author lile
*
*/
public class ComponentAnalysis {
/**
根据schema文件生成Java类的命令：
xjc.bat -classpath . ie/swing/config/component-1.0.xsd
*/
/**
* XML to Java
* @param packageName 包名， 如 ie.swing.xml.model
* @param xmlPath 要解析的xml文件路径 如 "src/ie/swing/config/component.xml"
* @return rootObject 根对象
* @throws JAXBException
* @throws FileNotFoundException
*/
public T xml2Java(String packageName, String xmlPath) throws JAXBException, FileNotFoundException {
JAXBContext context = JAXBContext.newInstance(packageName);
Unmarshaller unmarshaller = context.createUnmarshaller();
File file = new File(xmlPath);
@SuppressWarnings("unchecked")
JAXBElement rootElement = (JAXBElement) unmarshaller.unmarshal(file);
T rootObject = rootElement.getValue();
return rootObject;
}
/**
* Java to XML
* @param rootObject 根对象, Xml 根标签对应的对象
* @param out 输出流，该方法将xml数据写入该输出流
* @throws JAXBException
*/
public void java2XML(T rootObject, OutputStream out) throws JAXBException {
JAXBContext context = JAXBContext.newInstance(rootObject.getClass());
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "utf-8"); // 编码格式
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // 是否格式化生成的xml串
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false); // 是否省略xml头信息
marshaller.marshal(rootObject, out);
}
/**
* 测试运行
* @param args
* @throws FileNotFoundException
* @throws JAXBException
*/
public static void main(String[] args) throws FileNotFoundException, JAXBException {
ComponentAnalysis ca = new ComponentAnalysis();
//将Xml解析成Java对象
Components cps = ca.xml2Java("ie.swing.xml.model", "src/ie/swing/config/component.xml");
//将解析出的Java对象cps解析回Xml并输出到System.out
ca.java2XML(cps, System.out);
}
}
示例xsd schema文件 component-1.0.xsd：
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
targetNamespace="http://www.ie168.org/component-1.0"
xmlns:tns="http://www.ie168.org/component-1.0"
elementFormDefault="qualified">
[利用Marshaller和unMarshaller可在java的object对象和xml之间实现转换首先创建一个简单的Boy对象[java] view plaincopyprint@XmlRootElement(name=Root) @XmlAccessorTy
示例xml文件: component.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ie="http://www.ie168.org/component-1.0"
xsi:schemaLocation="http://www.ie168.org/component-1.0 component-1.0.xsd">
运行之前先用JDK自带的命令：
xjc.bat -classpath . 包名/component-1.0.xsd
根据schema文件生成对应的Java类[使用jaxb xml与对象javabean之间转换,对象生成soap报文xml,soap报文xml转换为对象]