java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver 发生异常.为什么? [英] java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver Exception occurring. Why?

问题描述

我创建了一个 MS Access 数据库并为其分配了一个 DSN.我想通过我的 Java 应用程序访问它.

I have created an MS Access database and assigned a DSN to it. I want to access it through my Java application.

这就是我正在做的:

public class AccessDbConnection {

    public static void main(String[] args) {
        System.out.println("**ACCESS DB CONNECTION**");

        try {
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // for MS Access ... MS access driver loading

            String     conURL    = "jdbc:odbc:sampleDNS";
            Connection con       = DriverManager.getConnection(conURL);
            Statement  statement = con.createStatement();
            String     qry       = "SELECT * FROM Table1";
            ResultSet  rs        = statement.executeQuery(qry);

            while(rs.next()) {
                String id    = rs.getString("ID") ;
                String fname = rs.getString("First_Name");
                String lname = rs.getString("Last_Name");
                System.out.println(id + fname + lname);
            }
        } catch (ClassNotFoundException ex) {
            System.out.println("Classforname Exception!!");
            Logger.getLogger(AccessDbConnection.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            System.out.println("DriverManager Exception!!");
            Logger.getLogger(AccessDbConnection.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

我在 try 块的第一行收到异常.那就是class.forname("..");.为什么我有这个异常?

I am getting the exception at the first line of try block. That is class.forname("..");. Why am I having this Exception?

推荐答案

对于 Java 7，您可以简单地省略 Class.forName() 语句，因为它并不是真正必需的.

For Java 7 you can simply omit the Class.forName() statement as it is not really required.

对于 Java 8，您不能使用 JDBC-ODBC 桥，因为它已被删除.您将需要使用诸如 UCanAccess 之类的东西.如需更多信息，请参阅

For Java 8 you cannot use the JDBC-ODBC Bridge because it has been removed. You will need to use something like UCanAccess instead. For more information, see

在没有 ODBC 的情况下从 Java 操作 Access 数据库

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