0
我正在使用JDBC驅動程序連接到SQL數據庫的項目的新模塊。我需要使用返回類型爲org.forgerock.opendj.ldap.Connection的方法getConnection()實現連接接口。但是，JDBC驅動程序返回類型爲com.mysql.jdbc.JDBC4Connection的連接。鑄造給了我以下錯誤：Casting JDBC連接
Exception in thread "main" java.lang.ClassCastException:
com.mysql.jdbc.JDBC4Connection cannot be cast to org.forgerock.opendj.ldap.Connection
at org.forgerock.opendj.virtual.JDBCConnectionFactory.getConnection(JDBCConnectionFactory.java:105)
什麼是獲得型org.forgerock.opendj.ldap.Connection代替com.mysql.jdbc.JDBC4Connection的連接的最佳方式？
的JDBCConnectionFactory類：
public class JDBCConnectionFactory implements ConnectionFactory{
private final String driverName = "com.mysql.jdbc.Driver";
private Connection con = null;
private String ConnectionUrl = "";
private final String Host;
private final int Port;
private final String DbName;
private final String UserName;
private final String UserPass;
public JDBCConnectionFactory(final String host, final int port, final String dbName, final String userName, final String userPass) {
this.Host = host;
this.Port = port;
this.DbName = dbName;
this.UserName = userName;
this.UserPass = userPass;
this.ConnectionUrl="jdbc:mysql://"
.concat(this.Host+":")
.concat(this.Port+"/")
.concat(this.DbName);
try {
Class.forName(driverName);
} catch (ClassNotFoundException e) {
System.out.println(e.toString());
}
}
getConnection方法：
@Override
public org.forgerock.opendj.ldap.Connection getConnection()throws ErrorResultException {
try {
con = DriverManager
.getConnection(this.ConnectionUrl,this.UserName,this.UserPass);
org.forgerock.opendj.ldap.Connection newcon = (org.forgerock.opendj.ldap.Connection) con;
System.out.println("Connection created.");
return newcon;
} catch (SQLException e) {
System.out.println(e.toString());
return null;
}
}
你正在創建通過MySQL驅動一個MySQL JDBC連接。你爲什麼會認爲你會得到不同的東西？ – 2013-02-22 09:30:41
@BrianAgnew我不希望有任何不同於驅動程序中的com.mysql.jdbc.JDBC4Connection，我只是在尋找將其轉換爲org.forgerock.opendj.ldap.Connection類型的最佳方法。 – Glenn 2013-02-22 09:38:32
所以鑄造不是*轉換*。而且我仍然懷疑你正在連接到MySQL數據庫，並試圖將其解釋爲LDAP服務器。 – 2013-02-22 09:52:06