使用XStream进行XML与对象的互相转换

近来遇到的编程过程中需要对XML进行大量的处理,java是面向对象的,所以要把XML的处理转化为面向对象的处理.下面记录下我用XStream进行XML与对象的转换过程.

public class XmlUtils {
 private static XStream xstream;

 static {
  xstream = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));

 }

 /**
  * XML to object.
  *
  * @param inputXml
  *            XML string.
  * @param types
  *            annotation classes.
  * @return
  * @throws Exception
  */
 public static Object xml2Object(String inputXml, Class<?>[] types) throws Exception {

  if (null == inputXml || "".equals(inputXml)) {
   return null;
  }
  xstream.processAnnotations(types);
  return xstream.fromXML(inputXml);

 }

 /**
  * object to XML.
  *
  * @param ro
  *            Object.
  * @param types
  *            annotation classes.
  * @return
  * @throws Exception
  */
 public static String object2Xml(Object ro, Class<?>[] types) throws Exception {
  if (null == ro) {
   return null;
  }
  xstream.processAnnotations(types);

  return xstream.toXML(ro);
 }
}
对生成xml中__替换_的最新写法是:xstream = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));

网上很多用这种XStream xstream = new XStream(new XppDriver(new XmlFriendlyReplacer("-_", "_")));

帮助文档上明确写明

 /**
     * @since 1.2
     * @deprecated As of 1.4, use {@link #DomDriver(String, NameCoder)} instead.
     */

说明1.4已经废弃了这种做法.

处理过程中都用了annotations来处理对象,下面是其中一个对象的例子

import com.thoughtworks.xstream.annotations.XStreamAlias;

@XStreamAlias("RESULT")
public class ResultObject {
 @XStreamAlias("RTNCODE")
 private String rtncode;

 @XStreamAlias("MESSAGE")
 private String message;

 @XStreamAlias("CONTENT")
 private Content content;
...省略了get, set方法

 

下面是使用XmlUtils 的测试例子

try {
   Class<?>[] types = new Class[] { ResultObject.class, Content.class};
   resultXml = XmlUtils.object2Xml(ro, types);//其中ro是要转换的对象
   System.out.println(resultXml);
  } catch (Exception e) {
   System.out.println(e.getMessage());
   e.printStackTrace();
  }

 

//下面是转换xml成对象的测试代码
   InputObject io = (InputObject) XmlUtils.xml2Object(str, new Class[] { InputObject.class });

 

其中str是xml格式字符串.

 

经过测试,转换效率还挺高.

如有问题,请联系我.谢谢,如转载请注明出处.

评论

1 楼 lizhenlzlz 2018-01-06  

private static XStream xstream;

static {
  xstream = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));

}
对我有用