WEB开发网
开发学院WEB开发Jsp Castor -- 将Java对象和XML自动绑定的程序 阅读

Castor -- 将Java对象和XML自动绑定的程序

 2008-01-05 19:22:17 来源:WEB开发网   
核心提示:1. Castor是什么Castor是一种将java对象和xml自动绑定的开源软件. 它可以在Java对象,XML文本,SQL数据表以及LDAP目录之间绑定.²网址: http://www.castor.org/2. Castor使用²Java对象指的是具有setX和getX方法的JavaBean,

  1. Castor是什么
  
  Castor是一种将java对象和xml自动绑定的开源软件. 它可以在Java对象,XML文本,SQL数据表以及LDAP目录之间绑定.
  
  ²网址: http://www.castor.org/
  
  2. Castor使用
  
  ²Java对象指的是具有setX和getX方法的JavaBean,将Castor用于JavaBean具体使用方法如下:
  
  Ø缺省用法: 缺省用法指的是没有使用映射格式描述文件时的用法
  
  import java.io.*;
  
  import org.exolab.castor.xml.*;
  
  public class Test
  
  {
  
  public static void main(String[] argv) {
  
  // build a test bean
  
  FlightBean bean = new FlightBean();
  
  bean.setCarrier("AR");
  
  bean.setNumber(426);
  
  bean.setDepartureTime("6:23a");
  
  bean.setArrivalTime("8:42a");
  
  try {
  
  // write it out as XML
  
  File file = new File("test.xml");
  
  Writer writer = new FileWriter(file);
  
  Marshaller.marshal(bean, writer);
  
  // now restore the value and list what we get
  
  Reader reader = new FileReader(file);
  
  FlightBean read = (FlightBean)
  
  Unmarshaller.unmarshal(FlightBean.class, reader);
  
  System.out.PRintln("Flight " + read.getCarrier() +
  
  read.getNumber() + " departing at " +
  
  read.getDepartureTime() +
  
  " and arriving at " + read.getArrivalTime());
  
  } catch (IOException ex) {
  
  ex.printStackTrace(System.err);
  
  } catch (MarshalException ex) {
  
  ex.printStackTrace(System.err);
  
  } catch (ValidationException ex) {
  
  ex.printStackTrace(System.err);
  
  }
  
  }
  
  }
  
  Ø 标准用法:
  
  import java.io.*;
  
  import org.exolab.castor.xml.*;
  
  import org.exolab.castor.mapping.*;
  
  
  public class Test
  
  {
  
  public static void main(String[] argv) {
  
  // build a test bean
  
  FlightBean bean = new FlightBean();
  
  bean.setCarrier("AR");
  
  bean.setNumber(426);
  
  bean.setDepartureTime("6:23a");
  
  bean.setArrivalTime("8:42a");
  
  try {
  
  // write it out as XML
  
  Mapping map=new Mapping();
  
  map.loadMapping("mapping.xml");
  
  File file = new File("test.xml");
  
  Writer writer = new FileWriter(file);
  
  Marshaller marshaller =new Marshaller(writer);
  
  marshaller.setMapping(map);
  
  marshaller.marshal(bean);
  
  // now restore the value and list what we get
  
  Reader reader = new FileReader(file);
  
  Unmarshaller unmarshaller = new Unmarshaller(map);
  
  FlightBean read = (FlightBean)unmarshaller.unmarshal(reader);
  
  System.out.println("Flight " + read.getCarrier() +
  
  read.getNumber() + " departing at " +
  
  read.getDepartureTime() +" and arriving at " + read.getArrivalTime());
  
  } catch (IOException ex) {
  
  ex.printStackTrace(System.err);
  
  } catch (MarshalException ex) {
  
  ex.printStackTrace(System.err);
  
  } catch (ValidationException ex) {
  
  ex.printStackTrace(System.err);
  
  }
  
  catch (MappingException ex) {
  
  ex.printStackTrace(System.err);
  
  }
  
  }
  
  }
  
  Ø :缺省用法生成的XML文件如下:
  
  <?xml version="1.0" encoding="UTF-8"?>
  
  <arrival-time>8:42a</arrival-time>
  <departure-time>6:23</departure-time>
  <carrier>AR</carrier>
  
  也就是说
  •对于具有基本类型值的属性创建元素的一个属性(本例中只有 number 属性通过 getNumber() 方法公开为 int 值)。

Tags:Castor Java 对象

编辑录入:爽爽 [复制链接] [打 印]
赞助商链接