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コマンドラインからJDBC oracleを実行する際に、次のような問題があります。私はIntelliJの中に次のコードを実行すると、それは魔法のように動作しますが、私はコマンドラインからJDBC oracle java programmを実行する
java UserInterface filldb
でコマンドラインを経由して、それを実行しようとすると、私はfollwingエラーを取得する：
An error occured: oracle.jdbc.driver.OracleDriver
は、どのように私はこれを実行しませんコマンドラインからのプログラム？ここで
import java.sql.*;
import java.util.List;
import oracle.jdbc.driver.*;
import javax.security.auth.callback.ConfirmationCallback;
final public class DatabaseDAO implements DAO {
private String database;
private String user;
private String pass;
// establish connection to database
private Connection con;
private Statement stmt;
DatabaseDAO() throws ClassNotFoundException, SQLException{
// load drivers and save user data
Class.forName("oracle.jdbc.driver.OracleDriver");
database = "jdbc:oracle:thin:@oracle-lab.cs.univie.ac.at:1521:lab";
user = "*****";
pass = "*****";
}
public void openConnection(String user, String database, String pass) throws SQLException{
con = DriverManager.getConnection(database, user, pass);
stmt = con.createStatement();
}
public void openConnection() throws SQLException{
openConnection(user, database, pass);
}
public void closeConnection() { //local exception handling so method can be called in finally block, seems safer
try {
stmt.close();
con.close();
}
catch (Exception e) {
System.err.println("Fehler beim Verbindungsabbau in DatabaseDAO.closeConnection(): " + e.getMessage());
System.exit(1);
}
}
private void printTableSize(String tablename) throws SQLException {
ResultSet rs = stmt.executeQuery("SELECT COUNT(*) FROM " + tablename);
if (rs.next()) {
int count = rs.getInt(1);
System.out.println("Number of datasets in table " + tablename + ": "+ count);
}
rs.close();
}
private boolean insertSQL (String values, String tablename) throws SQLException {
String insertSql = "INSERT INTO " + tablename + " VALUES " + values;
stmt.executeUpdate(insertSql);
return true;
}
public void flushTable(String tablename) throws SQLException{
stmt.executeQuery("DELETE FROM " + tablename);
}
public void flushDatabase() throws SQLException {
for (Relation r : Relation.values())
flushTable(r.toString());
}
/*
public ArrayList<String> getDatabaseEntry(int type, List<String> key) throws ClassNotFoundException, SQLException, IllegalArgumentException {
}
*/
/*
public boolean deleteDatabaseEntry(List<String> key) throws ClassNotFoundException, SQLException, IllegalArgumentException{}
*/
public boolean saveDatabaseEntry(Relation type, DatabaseObject entry){
boolean success = false;
try{
switch (type) {
case Firma: {
Firma e = (Firma)entry;
String values = "(" + e.getSteuerbuchummer() + "," + e.getName() + "," + e.getFirmenbuchnummer() + ")";
printTableSize(Relation.Firma.toString());
success = insertSQL(values, Relation.Firma.toString());
} break;
case Template: {
Template e = (Template) entry;
String values = "(" + e.getUrl() + "," + e.getSprache() + "," + e.getIp() + ")";
printTableSize(Relation.Template.toString());
success = insertSQL(values, Relation.Template.toString());
} break;
case verwendet: {
verwendet e = (verwendet) entry;
String values = "(" + e.getSteuerbuchummer() + "," + e.getUrl() + ")";
printTableSize(Relation.verwendet.toString());
success = insertSQL(values, Relation.verwendet.toString());
} break;
case Unterseite: {
Unterseite e = (Unterseite) entry;
String values = "(" + e.getUrl() + "," + e.getPfad() + ")";
printTableSize(Relation.Unterseite.toString());
success = insertSQL(values, Relation.Unterseite.toString());
} break;
case Verkaufsseite: {
Verkaufsseite e = (Verkaufsseite) entry;
String values = "(" + e.getUrl() + "," + e.getPfad() + ", " + e.getTitel() + ")";
printTableSize(Relation.Verkaufsseite.toString());
success = insertSQL(values, Relation.Verkaufsseite.toString());
} break;
case UserAccount: {
UserAccount e = (UserAccount) entry;
String values = "(" + e.getEmail() + "," + e.getUserID() + ", " + e.getBankdaten() + ", " + e.getAdresse() + ")";
printTableSize(Relation.UserAccount.toString());
success = insertSQL(values, Relation.UserAccount.toString());
} break;
case befreundet: {
befreundet e = (befreundet) entry;
String values = "(" + e.getUserID1() + "," + e.getUserID2() + ")";
printTableSize(Relation.befreundet.toString());
success = insertSQL(values, Relation.befreundet.toString());
} break;
case Produkt: {
Produkt e = (Produkt) entry;
String values = "(" + e.getProduktID() + "," + e.getPreis() + "," + e.getProduktname() + ")";
printTableSize(Relation.Produkt.toString());
success = insertSQL(values, Relation.Produkt.toString());
} break;
case kauftEin: {
kauftEin e = (kauftEin) entry;
String values = "(" + e.getUrl() + "," + e.getUserID() + "," + e.getPfad() + "," + e.getProduktID() + "," + e.getAnzahl() + ")";
printTableSize(Relation.kauftEin.toString());
success = insertSQL(values, Relation.kauftEin.toString());
} break;
default:
throw new IllegalArgumentException("Parameter ungueltig in DatabaseDAO.saveDatabaseEntry(Relation type, DatabaseObject entry).");
}
}
catch (Exception e)
{
System.err.println("Fehler beim Einfuegen des Datensatzes in DatabaseDAO.saveDatabaseEntry(Relation type, DatabaseObject entry): " + e.getMessage());
success = false;
}
return success;
}
public Connection getCon() {
return con;
}
public Statement getStmt() {
return stmt;
}
}
がメインクラスです：
import java.sql.SQLException;
public class UserInterface {
private enum Command {
filldb, flushdb
}
private static final Command checkInput(String s){
Command[] command = Command.values();
for(int i = 0; i < command.length; i++) if (command[i].toString().equals(s)) return command[i];
throw new IllegalArgumentException("Commandline Parameter nicht erkannt. Kommandos: filldb, flushdb");
}
public static void main(String args[]) {
DatabaseDAO db = null;
try {
Command command = checkInput(args[0]);
switch(command){
case filldb: {
System.out.println("Initializing DB.");
db = new DatabaseDAO();
db.openConnection();
System.out.println("Done.\nGenerating data and filling DB (this may take a few minutes).");
TestDataGenerator tdg = new TestDataGenerator(db);
tdg.testData(Relation.Firma, 2000);
tdg.testData(Relation.Template, 2000);
tdg.testData(Relation.verwendet, 500);
tdg.testData(Relation.Unterseite, 1000);
tdg.testData(Relation.Verkaufsseite, 1000);
tdg.testData(Relation.UserAccount, 3000);
tdg.testData(Relation.Produkt, 4000);
tdg.testData(Relation.befreundet, 500);
tdg.testData(Relation.kauftEin, 1000);
System.out.println("Done. DB is now filled with several thousand entries.");
} break;
case flushdb: {
System.out.println("Flushing DB");
db.flushDatabase();
}
}
}
catch (SQLException e) {
System.err.println("Ein Fehler ist bei der Kommunikation mit der Datenbank aufgetreten: "+ e.getMessage());
System.exit(1);
}
catch (ClassNotFoundException e) {
System.out.println("Klasse nicht gefunden: " + e.getMessage());
System.exit(1);
}
catch (Exception e) {
System.err.println("Ein Fehler ist aufgetreten: "+ e.getMessage());
System.exit(1);
}
finally{
if (!db.equals(null)) db.closeConnection();
System.exit(0);
}
}
}
JDBCドライバ（およびその他の従属ライブラリ）がクラスパス内にあることを確認してください。このプロジェクトがJarにエクスポートされている場合、 'META/manifiest.mf'ファイルの' class-path'要素が存在し、JARが指定された相対的な場所にあることを確認する必要があります – MadProgrammer
コマンドラインで-cp引数を使用する必要があるかもしれません。 – duffymo