xml 和 Java bean 互转实现类

该文参考实现自http://hbiao68.iteye.com/blog/1958413

这两天在实现websevice中服务方返回了xml结构的字符串，寻找了几个xml转bean的方法，结合自己的需要，整理实现个通用方法，做个记录

package com.me

import java.io.ByteArrayOutputStream;
import java.io.StringReader;

import javax.xml.bind.JAXBContext;  
import javax.xml.bind.JAXBException;  
import javax.xml.bind.Marshaller;  
import javax.xml.bind.Unmarshaller; 

public class aaaa {
	/**
	 * 将xml 转换为java bean
	 * @param className
	 * @param xmlStr
	 * @return java bean
	 * @throws ClassNotFoundException
	 */
	private static Object xml2bean(String className,String xmlStr) throws ClassNotFoundException{
		try {  
            JAXBContext context = JAXBContext.newInstance(Class.forName(className)); 
            Unmarshaller unmarshaller = context.createUnmarshaller();
            StringReader rd =  new StringReader(xmlStr);   
            Object req = (Object)unmarshaller.unmarshal(rd); 
            return req;
        } catch (JAXBException e) {  
            e.printStackTrace();
            return null;
        } 
	}
	
	/**
	 * 将java bean 转换为xml
	 * @param className
	 * @param bean
	 * @return XmlString
	 * @throws ClassNotFoundException
	 */
	private static String bean2xml(String className,Object bean) throws ClassNotFoundException{
		try {
			ByteArrayOutputStream baos = new ByteArrayOutputStream();
			JAXBContext context = JAXBContext.newInstance(Class.forName(className));  
			Marshaller marshaller = context.createMarshaller();  
			marshaller.marshal(bean,baos);
			return baos.toString();
        } catch (JAXBException e) {  
            e.printStackTrace();
            return null;
        } 
	}

	//测试方法
	public static void main(String args[]) throws java.lang.Exception{
		//将xml 转换为java bean
		String xmlStr = "<?xml version=\"1.0\" encoding=\"utf-8\"?>   <nacaoRequest>        <userName>user</userName>        <passWord></passWord>        <caInfo></caInfo>        <interfaceInfo>            <code>01</code><jgdm></jgdm> <jgmc></jgmc>   <zjhm></zjhm>           </interfaceInfo></nacaoRequest>";
        
        NacaoRequest req1 = (NacaoRequest)xml2bean(NacaoRequest.class.getName(),xmlStr);
        System.out.println(req1.getUserName());
        
		//将java bean 转换为xml
        InterfaceInfo inf = new InterfaceInfo("02","03","04","05");
        

//注意：
//需要转换的NacaoRequest对象一定要添加@XmlRootElement注解，其里面的其他对象则不需要
//需要转换的NacaoRequest对象一定要有不带参数的构造方法，包括该对象里面引用的对象。

<span style="color: rgb(255,0); font-family: Helvetica,Tahoma,Arial,sans-serif; font-size: 14px; line-height: 25.2000007629395px;"></span>
        NacaoRequest req2 =  new NacaoRequest();
        req2.setUserName("user");
        req2.setPassword("pwd");
        req2.setCaInfo("ca");
        req2.setInterfaceInfo(inf);
        
        String a = bean2xml(NacaoRequest.class.getName(),req2);
        System.out.println(a);
	}
}

希望能起到抛砖引玉的效果。