usermodel.java

闲着没事

package com.north.phonebook.model;
import java.io.*;

import javax.microedition.rms.*;

public class UserModel {

	private RecordStore accountStore;
	public static final String RNAME = "accountstore";

	public UserModel() {
		try {
			accountStore = RecordStore.openRecordStore(RNAME, true);
		} catch (RecordStoreException e) {
			e.printStackTrace();
		}
	}

	public void closeRecordStore() {
		try {
			accountStore.closeRecordStore();
		} catch (RecordStoreException e) {
			e.printStackTrace();
		}
	}

	public void deleteAccount() {
		try {
			closeRecordStore();
			if(accountStore!=null)RecordStore.deleteRecordStore(RNAME);
//			accountStore.deleteRecord(11);
//			accountStore.deleteRecord(12);
		} catch (Exception e) {
			// TODO: handle exception
			System.out.println(e);
		}
	}

	public void saveAccount(Account account) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		DataOutputStream dos = new DataOutputStream(baos);
		try {
			account.serialize();
			byte[] data = baos.toByteArray();
			accountStore.addRecord(data, 0, data.length);
			baos.close();
			System.out.println("==="+accountStore.getNumRecords());
		} catch (IOException e) {
			e.printStackTrace();
		} catch (RecordStoreException e) {
			e.printStackTrace();
		}

		
	}

	public Account getAccount(int recordID) {

		try {
			if (accountStore.getNumRecords() > 0) {
				byte[] data = accountStore.getRecord(recordID);
				ByteArrayInputStream bais = new ByteArrayInputStream(data);
				DataInputStream dis = new DataInputStream(bais);
				Account account = Account.deserialize(dis);
				bais.close();
				return account;
			}
			return null;

		} catch (IOException e) {
			return null;
		} catch (RecordStoreException e) {
			return null;
		}
	}

	public void savePreference(Preference preference) {
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		DataOutputStream dos = new DataOutputStream(baos);
		try {
//			accountStore.closeRecordStore();
			preference.serialize(dos);
			byte[] data = baos.toByteArray();
			int recordId = accountStore.addRecord(data, 0, data.length);
			baos.close();
			System.out.println("save=========="+recordId+"  " + preference);

		} catch (IOException e) {
			e.printStackTrace();
		} catch (RecordStoreException e) {
			e.printStackTrace();
		}

	}

	public Preference getPreference(int recordID) {
		try {
			System.out.println("getPreference:"+accountStore.getNumRecords());
			if (accountStore.getNumRecords() > 0) {
				byte[] data = accountStore.getRecord(recordID);
				ByteArrayInputStream bais = new ByteArrayInputStream(data);
				DataInputStream dis = new DataInputStream(bais);
				Preference preference = Preference.deserialize(dis);
				System.out.println(preference+"next=====:" + accountStore.getNextRecordID());

				bais.close();
				return preference;
			}
			return null;
		} catch (IOException e) {
			return null;
		} catch (RecordStoreException e) {
			return null;
		}
	}

}