用j2me写的电话簿程序，利用rms存储联系人信息

package myphonebook; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.util.*; import javax.microedition.rms.RecordEnumeration; import javax.microedition.rms.RecordStore; import javax.microedition.rms.RecordStoreException; public class Model { // 这里用Vector模拟持久性存储，下一章会介绍RMS private Vector entries = new Vector(); private RecordStore Phonebook = null; private String REC_STORE = new String("Phonebook"); private RecordStore PhonebookID = null; private String REC_STOREID = new String("PhonebookID"); private String editname = null; public void Model() { this.openRecStorePhonebook(); this.openRecStorePhonebookID(); } public RecordStore getRecordStore() { return this.Phonebook; } public void seteditname(Entry name) { editname = name.getName(); } // 创建一个记录存储Phonebook public void openRecStorePhonebook() { // ... // Create record store if it does not exist try { Phonebook = RecordStore.openRecordStore(REC_STORE, true); } catch (RecordStoreException e) { e.printStackTrace(); } // ... } // 创建一个记录存储PhonebookID public void openRecStorePhonebookID() { // ... // Create record store if it does not exist try { PhonebookID = RecordStore.openRecordStore(REC_STOREID, true); } catch (RecordStoreException e) { e.printStackTrace(); } // ... } // 添加联系人 public void addEntry(Entry entry) { System.out.println("modeladd1"); int addid = -1; try { // Write data into an internal byte array ByteArrayOutputStream strmBytes = new ByteArrayOutputStream(); // Write Java data types into the above byte array DataOutputStream strmDataType = new DataOutputStream(strmBytes); byte[] record; // Write Java data types String s = entry.getEmail(); strmDataType.writeUTF(s);// 写邮件 System.out.println("modeladd1"); s = entry.getMobile(); strmDataType.writeUTF(s);// 写移动电话 s = entry.getName(); strmDataType.writeUTF(s);// 写姓名 s = entry.getNativePlace(); strmDataType.writeUTF(s);// 写籍贯 s = entry.getPhone(); strmDataType.writeUTF(s);// 写固定电话 // Clear any buffered data strmDataType.flush(); // Get stream data into byte array and write record record = strmBytes.toByteArray(); // this.openRecStorePhonebook(); System.out.println("modeladd122"); addid = Phonebook.addRecord(record, 0, record.length); // Toss any data in the internal array so writes // starts at beginning (of the internal array) strmBytes.reset(); strmBytes.close(); strmDataType.close(); // Phonebook.closeRecordStore(); System.out.println("modeladd1234+添加完成"); } catch (Exception e) { // db(e.toString()); System.out.println(e.toString()); } System.out.println("modeladd123"); if (addid != -1) { try { ByteArrayOutputStream strmBytes = new ByteArrayOutputStream(); DataOutputStream strmDataType = new DataOutputStream(strmBytes); byte[] record; // Write Java data types strmDataType.writeInt(addid);// 写id strmDataType.writeUTF(entry.getName());// 写姓名 // Clear any buffered data strmDataType.flush(); // Get stream data into byte array and write record record = strmBytes.toByteArray(); // this.openRecStorePhonebookID(); addid = PhonebookID.addRecord(record, 0, record.length); // Toss any data in the internal array so writes // starts at beginning (of the internal array) strmBytes.reset(); strmBytes.close(); strmDataType.close(); // PhonebookID.closeRecordStore(); } catch (Exception e) { // db(e.toString()); System.out.println(e.toString()); } } } // 读取联系人信息 public Entry getEntry(int index) { return (Entry) entries.elementAt(index); } // 更新联系人信息 public void updateEntry(Entry entry) { System.out.print("kaishigengxin 0"); int id = -1; String name = null; try { System.out.print("kaishigengxin 1"); RecordEnumeration re = PhonebookID.enumerateRecords(null, null, false); while (re.hasNextElement()) { byte[] recData;// = new byte[50]; recData = re.nextRecord(); ByteArrayInputStream strmBytes = new ByteArrayInputStream( recData); DataInputStream strmDataType = new DataInputStream(strmBytes); System.out.print("kaishigengxin 2"); try { id = strmDataType.readInt(); name = strmDataType.readUTF(); } catch (Exception e) { System.out.print(e.toString()); } if (name.equals(editname)) { break; } } } catch (Exception e) { // db(e.toString()); System.out.println(e.toString() + "修改出错"); } try { ByteArrayOutputStream strmBytes = new ByteArrayOutputStream(); DataOutputStream strmDataType = new DataOutputStream(strmBytes); byte[] record; strmDataType.writeUTF(entry.getEmail());// 写邮件 strmDataType.writeUTF(entry.getMobile());// 写移动电话 strmDataType.writeUTF(entry.getName());// 写姓名 strmDataType.writeUTF(entry.getNativePlace());// 写籍贯 strmDataType.writeUTF(entry.getPhone());// 写固定电话 strmDataType.flush(); // Get stream data into byte array and write record record = strmBytes.toByteArray(); Phonebook.setRecord(id, record, 0, record.length); strmBytes.reset(); strmBytes.close(); strmDataType.close(); } catch (Exception e) { // db(e.toString()); System.out.println(e.toString()); } try { ByteArrayOutputStream strmBytes = new ByteArrayOutputStream(); DataOutputStream strmDataType = new DataOutputStream(strmBytes); byte[] record; strmDataType.writeInt(id);// 写邮件 strmDataType.writeUTF(entry.getName());// 写姓名 strmDataType.flush(); // Get stream data into byte array and write record record = strmBytes.toByteArray(); PhonebookID.setRecord(id, record, 0, record.length); strmBytes.reset(); strmBytes.close(); strmDataType.close(); } catch (Exception e) { // db(e.toString()); System.out.println(e.toString()); } } // 读取所有联系人 public Entry[] getAll() { Entry[] ret = null; try { RecordEnumeration ree = Phonebook.enumerateRecords(null, null, false); // System.out.println(ree.numRecords()); ret = new Entry[ree.numRecords()]; int i = 0; // System.out.println("model3 " + ree.numRecords()); // String temp[]=new String[ree.numRecords()]; while (ree.hasNextElement()) { int j = ree.nextRecordId(); byte[] recData = Phonebook.getRecord(j); ByteArrayInputStream strmBytes = new ByteArrayInputStream( recData); DataInputStream strmDataType = new DataInputStream(strmBytes); try { String email = strmDataType.readUTF(); String Mobile = strmDataType.readUTF(); String Name = strmDataType.readUTF(); String NativePlace = strmDataType.readUTF(); String Phone = strmDataType.readUTF(); ret[i] = new Entry(email, Mobile, Name, NativePlace, Phone); i++; } catch (Exception e) { System.out.print(e.toString()); } } } catch (RecordStoreException e) { e.printStackTrace(); System.out.println("model7"); } System.out.println("model8 "); return ret; } public int size() { return entries.size(); } // 删除联系人 public void removeEntry(Entry entry) { int removeid = -1; String name = null; try { RecordEnumeration re = PhonebookID.enumerateRecords(null, null, false); while (re.hasNextElement()) { byte[] recData = re.nextRecord(); ByteArrayInputStream strmBytes = new ByteArrayInputStream( recData);