XStream解析和读取xml报文

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XStream读取和解析xml文件很简单，把xml结点定义好对象，最小的结点不用定义对象。不过这里要注意的是，当一个结点下有同样结点的多个时要把这个结点定义成List对象。如：

我的报文：

<request>
<order>
    <supplier>100000000000001</supplier>
    <buyer>上海航空1</buyer>
    <orderId>O20120416095100</orderId>
    <tickets>
      <ticket>
        <ticNo>E20120416095100</ticNo>
        <tradeType>APPLY</tradeType>
        <orderDate>2012-04-16</orderDate>
        <departDate>dasdddddd</departDate>
        <passenger>黄磊</passenger>
        <fyNo>CA1520</fyNo>
        <route>上海虹桥-北京</route>
        <pnr>PNR_001</pnr>
        <icsPnr>icsPnr</icsPnr>
        <amt>128000</amt>
        <memo>备注</memo>
        <ext1>扩展字段1</ext1>
        <ext2>扩展字段2</ext2>
      </ticket>
      <ticket>
        <ticNo>2E20120416095100</ticNo>
        <tradeType>APPLY</tradeType>
        <orderDate>2012-04-16</orderDate>
        <departDate>2012-04-16</departDate>
        <passenger>黄磊</passenger>
        <fyNo>CA1520</fyNo>
        <route>上海虹桥-北京</route>
        <pnr>PNR_001</pnr>
        <icsPnr>icsPnr</icsPnr>
        <amt>128000</amt>
        <memo>备注</memo>
        <ext1>扩展字段1</ext1>
        <ext2>扩展字段2</ext2>
      </ticket>
    </tickets>
</order>
<topic>
    <version>1.0</version>
    <charset>utf-8</charset>
</topic>
<sign>
    <signType>1</signType>
    <signContent>sing</signContent>
</sign>
</request>

request将被定义成一个对象，旗下有三个对象order，topic，sign。order下面有对象也有最小借点，这个对象是List对象Ticket。这里要注意的是，定义的时候是 private List<Ticket> tickets;

tickets下有List对象Ticket多个，

Requset：

public class Request {
private Order order;
private Topic topic;
private Sign sign;
public Order getOrder() {
  return order;
}
public void setOrder(Order order) {
  this.order = order;
}
public Topic getTopic() {
  return topic;
}
public void setTopic(Topic topic) {
  this.topic = topic;
}
public Sign getSign() {
  return sign;
}
public void setSign(Sign sign) {
  this.sign = sign;
}

}

Order：

public class Order {
private String supplier;
private String buyer;
private String orderId;
private List<Ticket> tickets;
public String getSupplier() {
  return supplier;
}
public void setSupplier(String supplier) {
  this.supplier = supplier;
}
public String getBuyer() {
  return buyer;
}
public void setBuyer(String buyer) {
  this.buyer = buyer;
}
public String getOrderId() {
  return orderId;
}
public void setOrderId(String orderId) {
  this.orderId = orderId;
}
public List<Ticket> getTickets() {
  return tickets;
}
public void setTickets(List<Ticket> tickets) {
  this.tickets = tickets;
}

}

Topic：

public class Topic {
private String version;

private String charset;

public String getVersion() {
return version;
}

public void setVersion(String version) {
this.version = version;
}

public String getCharset() {
return charset;
}

public void setCharset(String charset) {
this.charset = charset;
}

}

Sign：

public class Sign {
private String signType;
private String signContent;
public String getSignType() {
  return signType;
}
public void setSignType(String signType) {
  this.signType = signType;
}
public String getSignContent() {
  return signContent;
}
public void setSignContent(String signContent) {
  this.signContent = signContent;
}

}

Ticket：

public class Ticket {
private String ticNo;
private String tradeType;
private String orderDate;
private String departDate;
private String passenger;
private String fyNo;
private String route;
private String pnr;
private String icsPnr;
private Long amt;
private String memo;
private String ext1;
private String ext2;
public String getTicNo() {
  return ticNo;
}
public void setTicNo(String ticNo) {
  this.ticNo = ticNo;
}
public String getTradeType() {
  return tradeType;
}
public void setTradeType(String tradeType) {
  this.tradeType = tradeType;
}
public String getOrderDate() {
  return orderDate;
}
public void setOrderDate(String orderDate) {
  this.orderDate = orderDate;
}
public String getDepartDate() {
  return departDate;
}
public void setDepartDate(String departDate) {
  this.departDate = departDate;
}
public String getPassenger() {
  return passenger;
}
public void setPassenger(String passenger) {
  this.passenger = passenger;
}
public String getFyNo() {
  return fyNo;
}
public void setFyNo(String fyNo) {
  this.fyNo = fyNo;
}
public String getRoute() {
  return route;
}
public void setRoute(String route) {
  this.route = route;
}
public String getPnr() {
  return pnr;
}
public void setPnr(String pnr) {
  this.pnr = pnr;
}
public String getIcsPnr() {
  return icsPnr;
}
public void setIcsPnr(String icsPnr) {
  this.icsPnr = icsPnr;
}
public Long getAmt() {
  return amt;
}
public void setAmt(Long amt) {
  this.amt = amt;
}
public String getMemo() {
  return memo;
}
public void setMemo(String memo) {
  this.memo = memo;
}
public String getExt1() {
  return ext1;
}
public void setExt1(String ext1) {
  this.ext1 = ext1;
}
public String getExt2() {
  return ext2;
}
public void setExt2(String ext2) {
  this.ext2 = ext2;
}

}

这样就定义好了对象。

现在只要用XStream来读取了。

public class TestXStram {

public static void main(String[] args) {
  TestXStram t = new TestXStram();
  t.ticketsToXml();
  t.readTicketsXml();
}

public void readTicketsXml(){
  XStream xstream = new XStream(new DomDriver ());
  xstream.alias("topic", Topic.class);
  xstream.alias("order", Order.class);
  xstream.alias("sign", Sign.class);
  xstream.alias("ticket", Ticket.class);
  xstream.alias("request", Request.class);

  try {
   File file = new File("C:\\xml\\testXML.xml");
   InputStreamReader o = new FileReader(file);
   Reader reader = new InputStreamReader(new FileInputStream(file));

   //三种方法都可
//   xstream.fromXML(new FileInputStream(file));
//   xstream.fromXML(reader);
   Request request = (Request) xstream.fromXML(o);
   Request request1 = request;
   List<Ticket> tsl = request.getOrder().getTickets();
   Ticket ticket = tsl.get(0);

//修改票中的一个字段
ticket.setDepartDate("dasdddddd");

//requset和request1  修改一致
   String xml = xstream.toXML(request1);
   System.out.println(xml);

  } catch (FileNotFoundException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

}

public void ticketsToXml(){

  XStream xstream = new XStream(new DomDriver ());
  xstream.alias("topic", Topic.class);
  xstream.alias("order", Order.class);
  xstream.alias("sign", Sign.class);
  xstream.alias("ticket", Ticket.class);
  xstream.alias("request", Request.class);

  Request request = new Request();
  Order order = new Order();
  order.setBuyer("buyer");
  order.setOrderId("orderId");
  order.setSupplier("supplier");
  List<Ticket> ticketsList = new ArrayList<Ticket>();
  Ticket ticket = new Ticket();
  ticket.setAmt(21388L);
  ticketsList.add(ticket);
  order.setTickets(ticketsList);

  Ticket ticket2 = new Ticket();
  ticket2.setAmt(21388L);
  ticketsList.add(ticket2);
  order.setTickets(ticketsList);
  request.setOrder(order);

  String xml = xstream.toXML(request);
  System.out.println(xml);




}
}