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Я работаю на школьном проекте, и я должен подключиться к базе данных делается в SQL Anywhere 17, и я получаю протекающий ошибку:Java подключиться к SQL Anywhere 17
No suitable driver found for jdbc:sqlanywhere:Tds:localhost:2638?eng="DBNAME".
Любая помощь приветствуется.
Вот код для класса, выполняющего соединение.
package model;
import java.sql.*;
public class DBConnection {
public class ConnectionHandler {
ResultSet r;
Statement s;
String returnStatus;
}
private String db, user, passwd;
private String dbUrl;
private Connection conn;
public DBConnection(String db, String user, String passwd, Object openserver, String databasepath) {
this.db = db;
this.user = user;
this.passwd = passwd;
dbUrl = "jdbc:sqlanywhere:Tds:localhost:2638?eng=" + db;
try {
conn = DriverManager.getConnection(dbUrl, user, passwd);
conn.setAutoCommit(false);
} catch (Exception e) {
System.out.println(e);
Boolean openServer = (Boolean) openserver;
if (openServer.booleanValue())
try {
String engcommand = "dbeng12 " + databasepath + db + ".db";
Runtime.getRuntime().exec(engcommand);
long t0, t1;
t0 = System.currentTimeMillis();
do {
t1 = System.currentTimeMillis();
} while (t1 - t0 < 5000);
conn = DriverManager.getConnection(dbUrl, user, passwd);
conn.setAutoCommit(false);
} catch (Exception ex) {
System.out.println("Unable to start server. " + ex);
}
}
}
public void updateStatement(String sql, ConnectionHandler ch) {
Integer result = new Integer(0);
String message = null;
if (sql.trim().substring(0, 1).equalsIgnoreCase("U"))
message = "Number of rows updated: ";
else if (sql.trim().substring(0, 1).equalsIgnoreCase("I"))
message = "Number of rows inserted: ";
else
message = " ";
try {
ch.s = conn.createStatement();
result = new Integer(ch.s.executeUpdate(sql));
ch.returnStatus = message + result;
} catch (Exception e) {
System.out.println("Unable to execute the insert/update/delete statement. " + e);
ch.returnStatus = "Error:" + e.toString();
}
}
public void returnResultSetSelectStatement(String sql, int resultsetType, ConnectionHandler ch) {
ch.r = null;
try {
if (resultsetType == 1)
ch.s = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_UPDATABLE);
else
ch.s = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
ch.r = ch.s.executeQuery(sql);
} catch (Exception e) {
ch.returnStatus = e.toString();
System.out.println("Unable to execute the returnSelectStatement. " + e);
}
}
}