propertiesutil.java

个人通讯录

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Vector;

import javax.swing.JOptionPane;

public class PropertiesUtil {
	private Vector<User> vectUsers;
	
	public PropertiesUtil(String fileName){
			vectUsers = new Vector<User>();
	}
	
	@SuppressWarnings("unchecked")//忽略错误（给编译器一条指令
                                 //告诉它对被批注的代码元素内部的某些警告保持静默）
				                 //"unchecked"-----执行了未检查的转换时的警告
	public  Vector<User> getUsers(){
		try {
			  ObjectInputStream ois = new ObjectInputStream(new FileInputStream("config/telephone.dat"));		
			  vectUsers =  (Vector<User>)ois.readObject();
			  ois.close();
		   }catch(FileNotFoundException e){
			   initRecord();
		  } catch (ClassNotFoundException e) {
			e.printStackTrace();
		  } catch (IOException e) {
			e.printStackTrace();		
		  }
		 return vectUsers;
   }
	
	public void save(User user){
		try {
			ObjectOutputStream oos = new ObjectOutputStream(
									 new FileOutputStream("config/telephone.dat"));
			int i;
			for( i = 0;i < vectUsers.size();i++){
				if(user.getNo() == vectUsers.get(i).getNo()){
					vectUsers.set(i, user);//修改
					break;
				}
			}
			if(i >= vectUsers.size()){
			    vectUsers.add(user);//新增
			}
			oos.writeObject(vectUsers);
			oos.flush();
			oos.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}	
	
	/**
	 * 若记录文件不存在,则初始化记录文件
	 */
	private void initRecord(){
		//创建文件
		File f = new File("config/telephone.dat");
		try {
			f.createNewFile();
		} catch (IOException e1) {
			e1.printStackTrace();
		}
		//新建一条记录
		User u = new User();
		u.setNo(1);
		u.setName("输入用户名");
		u.setCategory("请选择类别");
		u.setSex("M");
		u.setPhone("请输入电话号码");
		u.setImagePath("输入图片路径");
		try {
			ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("config/telephone.dat"));
			vectUsers.add(u);
			oos.writeObject(vectUsers);
			oos.close();

            JOptionPane.showMessageDialog(null, "请重启本程序");
            System.exit(0);
		} catch (FileNotFoundException e1) {
			e1.printStackTrace();
		} catch (IOException e1) {
			e1.printStackTrace();
		}
	}

	public void delete(int index) {
		try {
			ObjectOutputStream oos = new ObjectOutputStream(
					new FileOutputStream("config/telephone.dat"));
			vectUsers.remove(index);
			oos.writeObject(vectUsers);
			oos.flush();
			oos.close();
		}catch (IOException e) {
			e.printStackTrace();
		}
		
	}
}