xml与Java对象的转换

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1.xstream解析报文
XStreamComponent x = XStreamComponent.newInstance();
x.processAnnotations(new Class[]{EquityExchangeDetail.class,PearTicketCustomerDTO.class,Date.class,Integer.class});
EquityExchangeDetail ptd = (EquityExchangeDetail) x.fromXML(xml);

2.xstream封装报文
XStreamComponent xres = XStreamComponent.newInstance();
xres.processAnnotations(new Class[]{TransResult.class});
String result=xres.toXML(transResult);

3.
注解：
@XStreamAlias("customerInfo") //报文中<customerInfo>节点对应类名“PearTicketCustomerDTO”
public class PearTicketCustomerDTO {

@XStreamAlias("idno") //报文中<idno>节点对应类属性“idno”
private String idno;

@XStreamOmitField
private Long ticketId; //报文中无<ticketId>节点，解析时忽略类属性ticketId

4.方法比较
x.processAnnotations（new Class[]{PearTicketDTO.class}）：读取类名注解
x.alias(new Class[]{PearTicketDTO.class})：不读取类名注解
5.解析报文
x.alias("Equities", List.class);--把报文节点<Equities> 转化为List对象
x.alias("Equity", Equity.class);--把报文节点<Equity> 转化为Equity类对象
List<Equity> equities = (List<Equity>) x.fromXML(xml);--开始转化

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