自己写的两个练习

来源：互联网发布：淘宝运动鞋店铺排行榜编辑：程序博客网时间：2024/05/21 11:32

//文件存储ArrayList

public class Data {

   public ArrayList<Message> read() {
       ArrayList<Message> list=new ArrayList<Message>();
       ObjectInputStream ois=null;
       File file =new File("e:"+File.separator+"message.txt");
       if(file.length()!=0){
           try {
               ois=new ObjectInputStream(new FileInputStream(file));
               if(ois!=null){
                   list=(ArrayList<Message>) ois.readObject();
               }
           } catch (IOException | ClassNotFoundException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
           }
       }
       return list;

   }
   public void write(ArrayList<Message> list){
       ObjectOutputStream oos=null;
       File file =new File("e:"+File.separator+"message.txt");
       try {
           oos=new ObjectOutputStream(new FileOutputStream(file));
           oos.writeObject(list);
           oos.close();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

   }
}

xml文件写入
public class ObjectAndXmlHandle {
   public static void ObjectToXml(Object object){
       try {
           JAXBContext context=JAXBContext.newInstance(object.getClass());
           Marshaller marshaller=context.createMarshaller();
           marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);//是否换行
           marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);//忽略开头
           marshaller.setProperty(Marshaller.JAXB_ENCODING, "GBK");//解析格式
           OutputStream oStream=new FileOutputStream("e:"+File.separator+"testPerson.xml",true);//输出路径
//           marshaller.marshal(object, oStream);
           marshaller.marshal(object, System.out);
       } catch (Exception e) {
           // TODO: handle exception
       }
   }
}

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