一、前言

通过xstream源码包中com.thoughtworks.xstream.XStream、com.thoughtworks.xstream.io.xml.DomDriver定义XmlStreamUtil解析工具类，对实体对象和xml字符串间相互转换处理，详情代码示例。

二、代码示例

import com.thoughtworks.xstream.XStream;@b@import com.thoughtworks.xstream.io.xml.DomDriver;@b@import java.io.File;@b@import java.io.FileInputStream;@b@import java.io.FileOutputStream;@b@import java.io.IOException;@b@import java.io.InputStream;@b@import java.io.OutputStream;@b@@b@public class XmlStreamUtil@b@{@b@  private static String ENCODE = "utf-8";@b@@b@  public static String toXml(Object obj)@b@  {@b@    XStream xstream = new XStream();@b@@b@    xstream.processAnnotations(obj.getClass());@b@    return xstream.toXML(obj);@b@  }@b@@b@  public static <T> T toBean(String xmlStr, Class<T> cls)@b@  {@b@    XStream xstream = new XStream(new DomDriver());@b@    xstream.processAnnotations(cls);@b@    Object obj = xstream.fromXML(xmlStr);@b@    return obj;@b@  }@b@@b@  public static boolean toXMLFile(Object obj, String absPath, String fileName)@b@    throws IOException@b@  {@b@    String strXml = toXml(obj);@b@    String filePath = absPath + fileName;@b@    File file = new File(filePath);@b@    if (!(file.exists()))@b@    {@b@      file.createNewFile();@b@    }@b@@b@    OutputStream ous = null;@b@    try {@b@      ous = new FileOutputStream(file);@b@      ous.write(strXml.getBytes());@b@      ous.flush();@b@    } finally {@b@      if (ous != null)@b@      {@b@        ous.close();@b@      }@b@    }@b@@b@    return true;@b@  }@b@@b@  public static <T> T toBeanFromFile(String absPath, String fileName, Class<T> cls)@b@    throws Exception@b@  {@b@    String filePath = absPath + fileName;@b@    InputStream ins = null;@b@    try {@b@      ins = new FileInputStream(new File(filePath));@b@@b@      XStream xstream = new XStream(new DomDriver(ENCODE));@b@      xstream.processAnnotations(cls);@b@      Object obj = null;@b@      obj = xstream.fromXML(ins);@b@      Object localObject1 = obj;@b@@b@      return localObject1;@b@    }@b@    finally@b@    {@b@      if (ins != null)@b@        ins.close();@b@    }@b@  }@b@@b@  public static <T> T toBeanFromFile(File file, Class<T> cls)@b@    throws Exception@b@  {@b@    InputStream ins = null;@b@    try {@b@      ins = new FileInputStream(file);@b@@b@      XStream xstream = new XStream(new DomDriver(ENCODE));@b@      xstream.processAnnotations(cls);@b@      Object obj = null;@b@@b@      obj = xstream.fromXML(ins);@b@      Object localObject1 = obj;@b@@b@      return localObject1;@b@    }@b@    finally@b@    {@b@      if (ins != null)@b@        ins.close();@b@    }@b@  }@b@}