Boa Tarde,
pessoal , estou tentando aprender como criar Banco de dados nativo no codigo usando JavaDB Derby , pois bem como não sou nenhum expert, em Java, solicito a ajuda de vcs.
para poder aprender peguei um codigo com as devidas instruções que segue
/*
* AddressDao.java
*
* Copyright 2006 Sun Microsystems, Inc. ALL RIGHTS RESERVED Use of
* this software is authorized pursuant to the terms of the license
* found at http://developers.sun.com/berkeley_license.html .
*/
package com.sun.demo.addressbook.db;
import com.sun.demo.addressbook.Address;
import com.sun.demo.addressbook.ListEntry;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
/**
*
* @author User
*
*/
public class AddressDao {
/** Creates a new instance of AddressDao */
public AddressDao() {
this("DefaultAddressBook");
}
public AddressDao(String addressBookName) {
this.dbName = addressBookName;
setDBSystemDir();
dbProperties = loadDBProperties();
String driverName = dbProperties.getProperty("derby.driver");
loadDatabaseDriver(driverName);
if(!dbExists()) {
createDatabase();
}
}
private boolean dbExists() {
boolean bExists = false;
String dbLocation = getDatabaseLocation();
File dbFileDir = new File(dbLocation);
if (dbFileDir.exists()) {
bExists = true;
}
return bExists;
}
private void setDBSystemDir() {
// decide on the db system directory
String userHomeDir = System.getProperty("user.home", ".");
String systemDir = userHomeDir + "/.addressbook";
System.setProperty("derby.system.home", systemDir);
// create the db system directory
File fileSystemDir = new File(systemDir);
fileSystemDir.mkdir();
}
private void loadDatabaseDriver(String driverName) {
// load Derby driver
try {
Class.forName(driverName);
} catch (ClassNotFoundException ex) {
ex.printStackTrace();
}
}
private Properties loadDBProperties() {
InputStream dbPropInputStream = null;
dbPropInputStream = AddressDao.class.getResourceAsStream("Configuration.properties");
dbProperties = new Properties();
try {
dbProperties.load(dbPropInputStream);
} catch (IOException ex) {
ex.printStackTrace();
}
return dbProperties;
}
private boolean createTables(Connection dbConnection) {
boolean bCreatedTables = false;
Statement statement = null;
try {
statement = dbConnection.createStatement();
statement.execute(strCreateAddressTable);
bCreatedTables = true;
} catch (SQLException ex) {
ex.printStackTrace();
}
return bCreatedTables;
}
private boolean createDatabase() {
boolean bCreated = false;
Connection dbConnection = null;
String dbUrl = getDatabaseUrl();
dbProperties.put("create", "true");
try {
dbConnection = DriverManager.getConnection(dbUrl, dbProperties);
bCreated = createTables(dbConnection);
} catch (SQLException ex) {
}
dbProperties.remove("create");
return bCreated;
}
public boolean connect() {
String dbUrl = getDatabaseUrl();
try {
dbConnection = DriverManager.getConnection(dbUrl, dbProperties);
stmtSaveNewRecord = dbConnection.prepareStatement(strSaveAddress, Statement.RETURN_GENERATED_KEYS);
stmtUpdateExistingRecord = dbConnection.prepareStatement(strUpdateAddress);
stmtGetAddress = dbConnection.prepareStatement(strGetAddress);
stmtDeleteAddress = dbConnection.prepareStatement(strDeleteAddress);
isConnected = dbConnection != null;
} catch (SQLException ex) {
isConnected = false;
}
return isConnected;
}
private String getHomeDir() {
return System.getProperty("user.home");
}
public void disconnect() {
if(isConnected) {
String dbUrl = getDatabaseUrl();
dbProperties.put("shutdown", "true");
try {
DriverManager.getConnection(dbUrl, dbProperties);
} catch (SQLException ex) {
}
isConnected = false;
}
}
public String getDatabaseLocation() {
String dbLocation = System.getProperty("derby.system.home") + "/" + dbName;
return dbLocation;
}
public String getDatabaseUrl() {
String dbUrl = dbProperties.getProperty("derby.url") + dbName;
return dbUrl;
}
public int saveRecord(Address record) {
int id = -1;
try {
stmtSaveNewRecord.clearParameters();
stmtSaveNewRecord.setString(1, record.getLastName());
stmtSaveNewRecord.setString(2, record.getFirstName());
stmtSaveNewRecord.setString(3, record.getMiddleName());
stmtSaveNewRecord.setString(4, record.getPhone());
stmtSaveNewRecord.setString(5, record.getEmail());
stmtSaveNewRecord.setString(6, record.getAddress1());
stmtSaveNewRecord.setString(7, record.getAddress2());
stmtSaveNewRecord.setString(8, record.getCity());
stmtSaveNewRecord.setString(9, record.getState());
stmtSaveNewRecord.setString(10, record.getPostalCode());
stmtSaveNewRecord.setString(11, record.getCountry());
int rowCount = stmtSaveNewRecord.executeUpdate();
ResultSet results = stmtSaveNewRecord.getGeneratedKeys();
if (results.next()) {
id = results.getInt(1);
}
} catch(SQLException sqle) {
sqle.printStackTrace();
}
return id;
}
public boolean editRecord(Address record) {
boolean bEdited = false;
try {
stmtUpdateExistingRecord.clearParameters();
stmtUpdateExistingRecord.setString(1, record.getLastName());
stmtUpdateExistingRecord.setString(2, record.getFirstName());
stmtUpdateExistingRecord.setString(3, record.getMiddleName());
stmtUpdateExistingRecord.setString(4, record.getPhone());
stmtUpdateExistingRecord.setString(5, record.getEmail());
stmtUpdateExistingRecord.setString(6, record.getAddress1());
stmtUpdateExistingRecord.setString(7, record.getAddress2());
stmtUpdateExistingRecord.setString(8, record.getCity());
stmtUpdateExistingRecord.setString(9, record.getState());
stmtUpdateExistingRecord.setString(10, record.getPostalCode());
stmtUpdateExistingRecord.setString(11, record.getCountry());
stmtUpdateExistingRecord.setInt(12, record.getId());
stmtUpdateExistingRecord.executeUpdate();
bEdited = true;
} catch(SQLException sqle) {
sqle.printStackTrace();
}
return bEdited;
}
public boolean deleteRecord(int id) {
boolean bDeleted = false;
try {
stmtDeleteAddress.clearParameters();
stmtDeleteAddress.setInt(1, id);
stmtDeleteAddress.executeUpdate();
bDeleted = true;
} catch (SQLException sqle) {
sqle.printStackTrace();
}
return bDeleted;
}
public boolean deleteRecord(Address record) {
int id = record.getId();
return deleteRecord(id);
}
public List<ListEntry> getListEntries() {
List<ListEntry> listEntries = new ArrayList<ListEntry>();
Statement queryStatement = null;
ResultSet results = null;
try {
queryStatement = dbConnection.createStatement();
results = queryStatement.executeQuery(strGetListEntries);
while(results.next()) {
int id = results.getInt(1);
String lName = results.getString(2);
String fName = results.getString(3);
String mName = results.getString(4);
ListEntry entry = new ListEntry(lName, fName, mName, id);
listEntries.add(entry);
}
} catch (SQLException sqle) {
sqle.printStackTrace();
}
return listEntries;
}
public Address getAddress(int index) {
Address address = null;
try {
stmtGetAddress.clearParameters();
stmtGetAddress.setInt(1, index);
ResultSet result = stmtGetAddress.executeQuery();
if (result.next()) {
String lastName = result.getString("LASTNAME");
String firstName = result.getString("FIRSTNAME");
String middleName = result.getString("MIDDLENAME");
String phone = result.getString("PHONE");
String email = result.getString("EMAIL");
String add1 = result.getString("ADDRESS1");
String add2 = result.getString("ADDRESS2");
String city = result.getString("CITY");
String state = result.getString("STATE");
String postalCode = result.getString("POSTALCODE");
String country = result.getString("COUNTRY");
int id = result.getInt("ID");
address = new Address(lastName, firstName, middleName, phone,
email, add1, add2, city, state, postalCode,
country, id);
}
} catch(SQLException sqle) {
sqle.printStackTrace();
}
return address;
}
public static void main(String[] args) {
AddressDao db = new AddressDao();
System.out.println(db.getDatabaseLocation());
System.out.println(db.getDatabaseUrl());
db.connect();
db.disconnect();
}
private Connection dbConnection;
private Properties dbProperties;
private boolean isConnected;
private String dbName;
private PreparedStatement stmtSaveNewRecord;
private PreparedStatement stmtUpdateExistingRecord;
private PreparedStatement stmtGetListEntries;
private PreparedStatement stmtGetAddress;
private PreparedStatement stmtDeleteAddress;
private static final String strCreateAddressTable =
"create table APP.ADDRESS (" +
" ID INTEGER NOT NULL PRIMARY KEY GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1)," +
" LASTNAME VARCHAR(30), " +
" FIRSTNAME VARCHAR(30), " +
" MIDDLENAME VARCHAR(30), " +
" PHONE VARCHAR(20), " +
" EMAIL VARCHAR(30), " +
" ADDRESS1 VARCHAR(30), " +
" ADDRESS2 VARCHAR(30), " +
" CITY VARCHAR(30), " +
" STATE VARCHAR(30), " +
" POSTALCODE VARCHAR(20), " +
" COUNTRY VARCHAR(30) " +
")";
private static final String strGetAddress =
"SELECT * FROM APP.ADDRESS " +
"WHERE ID = ?";
private static final String strSaveAddress =
"INSERT INTO APP.ADDRESS " +
" (LASTNAME, FIRSTNAME, MIDDLENAME, PHONE, EMAIL, ADDRESS1, ADDRESS2, " +
" CITY, STATE, POSTALCODE, COUNTRY) " +
"VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
private static final String strGetListEntries =
"SELECT ID, LASTNAME, FIRSTNAME, MIDDLENAME FROM APP.ADDRESS " +
"ORDER BY LASTNAME ASC";
private static final String strUpdateAddress =
"UPDATE APP.ADDRESS " +
"SET LASTNAME = ?, " +
" FIRSTNAME = ?, " +
" MIDDLENAME = ?, " +
" PHONE = ?, " +
" EMAIL = ?, " +
" ADDRESS1 = ?, " +
" ADDRESS2 = ?, " +
" CITY = ?, " +
" STATE = ?, " +
" POSTALCODE = ?, " +
" COUNTRY = ? " +
"WHERE ID = ?";
private static final String strDeleteAddress =
"DELETE FROM APP.ADDRESS " +
"WHERE ID = ?";
}porem tenho tido o seguinte erro
run:
java.lang.NoClassDefFoundError: addressbook/Main
Caused by: java.lang.ClassNotFoundException: addressbook.Main
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
Could not find the main class: addressbook.Main. Program will exit.
Exception in thread “main” Java Result: 1
CONSTRUÍDO COM SUCESSO (tempo total: 6 segundos)
segue o link que peguei de exemplo
http://java.sun.com/developer/technicalArticles/J2SE/Desktop/javadb/
Grato A todos.