代码如下：

package com.windtec.offline.server.service.gongan;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Vector;

import org.exolab.castor.mapping.MappingException;
import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.Marshaller;
import org.exolab.castor.xml.Unmarshaller;
import org.exolab.castor.xml.ValidationException;

import com.windtec.framework.BusinessException;

import com.windtec.hangan.gongan.bizcontrol.PSAuditSupport;
import com.windtec.hangan.gongan.pojos.PsAuditActivitymain;

/**
 * XML绑定公用服务类
 * @author caoxiang
 *
 */
public class CastorCommon {

 //操作类对象
 static PSAuditSupport pSAuditSupport;

 private String name;
 
 /**
  * 初始化
  *
  */
 public CastorCommon() {
  try {
   //对象化
   pSAuditSupport = new PSAuditSupport();
   //异常错误处理
  } catch (BusinessException e) {
   e.printStackTrace();
  }
 }
 
 public static void main(String[] args) {
  CastorCommon ooooooooooo = new CastorCommon();
  CastorCommon c = new CastorCommon();
  ooooooooooo.setName("caoxiang");
  c.setXmlBean(ooooooooooo,CastorCommon.class);
  Object oooo = c.getXmlBean(CastorCommon.class);
  CastorCommon cccc = (CastorCommon)oooo;
  System.out.println(cccc.getName());
 }
 
 /**
  * 返回XML绑定
  * @param classobject
  * @return
  */
 public Object getXmlBean(Class classobject) {
  //获得类名
  String className = classobject.getName().substring(classobject.getName().lastIndexOf(".")+1,classobject.getName().length());
  //文件名
  String filename = className + ".xml";
  //解析
  Unmarshaller un = new Unmarshaller(classobject);
  FileReader in = null;
  Object c;
  //Class.forName(classobject.toString()).newInstance();
  //c = (classobject.newInstance())c;
  try {
   in = new FileReader(filename);
  } catch (FileNotFoundException e) {
   e.printStackTrace();
   c = null;
  }
  CastorCommon cdsadas = null;
  try {
   cdsadas = (CastorCommon) un.unmarshal(in);
   //System.out.println(cdsadas.getName());
  } catch (MarshalException e2) {
   c = null;
   e2.printStackTrace();
  } catch (ValidationException e2) {
   e2.printStackTrace();
   c = null;
  }
  try {
   in.close();
   c = null;
  } catch (IOException e1) {
   e1.printStackTrace();
   c = null;
  }
  CastorCommon cc = (CastorCommon)c;
  
  //返回
  return cdsadas;
 }
 
 /**
  * 设置XML绑定
  * @param object
  * @param classobject
  * @return
  */
 public boolean setXmlBean(Object object, Class classobject) {
  //获得类名
  String className = classobject.getName().substring(classobject.getName().lastIndexOf(".")+1,classobject.getName().length());
  String filename = className + ".xml";
  File file = new File(filename);
  Writer writer = null;
  try {
   writer = new FileWriter(file);
  } catch (IOException e) {
   e.printStackTrace();
  }
  //判断是否为null
  if(writer == null) {
   return false;
  }
  try {
   Marshaller.marshal(object, writer);
   return true;
  } catch (MarshalException e1) {
   e1.printStackTrace();
   return false;
  } catch (ValidationException e1) {
   e1.printStackTrace();
   return false;
  }
 }
 
//==================================================================================================================================
 
 /**
  * 设置BEAN到流中
  * @param vector
  * @return
  */
 public boolean setBean(Vector vector,A a,Map m) {
  try {
   //对象初始化
   CastorBean castorBean = new CastorBean();
   //设置
   castorBean.setMmmp(m);
   castorBean.setA(a);
   castorBean.setVname("a");
   castorBean.setGonganVector(vector);
   File file = new File("castor.xml");
   Writer writer = new FileWriter(file);
   Marshaller.marshal(castorBean, writer);
   Unmarshaller un = new Unmarshaller(CastorBean.class);
   FileReader in = new FileReader("castor.xml");
   CastorBean c = (CastorBean) un.unmarshal(in);
   in.close();
   System.out.println(c.getA().getUsername());
   System.out.println(c.getVname());
   System.out.println("ddd " + c.getMmmp().get("b"));
   B b = (B)c.getMmmp().get("b");
   System.out.println(b.getA().getUsername()+ " dddddddddd");
   Vector v = c.getGonganVector();
   Iterator vvv = v.iterator();
   while(vvv.hasNext()) {
    Map n = new HashMap();
    n = (Map) vvv.next();
    System.out.println(n.isEmpty());
   }
   //Map map = (Map) v.get(0);
   //System.out.println(v.get(0));
//   Iterator i =c.getGonganVector().iterator();
//   while(i.hasNext()) {
//    //Map castorBean2 = (Map) i.next();
//    //B b = (B) castorBean2.get("b");
//    //System.out.println(b.getBname());
//   }
   //System.out.println("ddd "+c.getGonganVector().size());
   //System.out.println(map.get("b"));
   return true;
  } catch(Exception e) {
   e.printStackTrace();
   return false;
  }
 }
 
 /**
  *
  * @param argv
  */
 public static void main2222(String[] argv) {
  A a = new A();
  a.setUsername("caoxiang");
  a.setPassword("123456");
  B b = new B();
  b.setBname("linlin");
  b.setA(a);
  Map map = new HashMap();
  map.put("b",b);
  VectorBase vb = new VectorBase();
  vb.setMap(map);
  CastorCommon cccc = new CastorCommon();
  cccc.setBean(vb,a,map);
 }
 
 /**
  * 转换为XML文件
  * @param argv
  * @throws IOException
  * @throws MarshalException
  * @throws ValidationException
  * @throws MappingException
  * @throws BusinessException
  */
 public static void main2(String[] argv)
  throws
   IOException,
   MarshalException,
   ValidationException,
   MappingException,
   BusinessException {
  PSAuditSupport pSAuditSupport = new PSAuditSupport();
  PsAuditActivitymain psAuditInspectoractivity =
   new PsAuditActivitymain();
  psAuditInspectoractivity =
   (PsAuditActivitymain) pSAuditSupport
    .inspectoractivityDAO
    .find("select p from PsAuditActivitymain p")
    .get(0);
  File file = new File("user_temp.xml");
  Writer writer = new FileWriter(file);
  Marshaller.marshal(psAuditInspectoractivity, writer);

  Unmarshaller un = new Unmarshaller(PsAuditActivitymain.class);
  //un.setMapping(mapping);
  FileReader in = new FileReader("user_temp.xml");
  PsAuditActivitymain c = (PsAuditActivitymain) un.unmarshal(in);
  if (c != null) {
   System.out.println("pk:" + c.getPk());
   System.out.println(c.getInitActivity().getPk());
  }
  in.close();
 }
 
 /**
  * @return
  */
 public String getName() {
  return name;
 }

 /**
  * @param string
  */
 public void setName(String string) {
  name = string;
 }

} 

本文来源：http://blog.csdn.net/java_xiang/archive/2007/07/09/1683549.aspx