在JDBC-ODBC桥中使用保存点: UnsupportedOperationException

Question

我已经用MS Access连接了NetBeans集成开发环境，在进行事务处理时，我得到了这个错误。似乎保存点不是supported...Please引导我..

             Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            conn = DriverManager.getConnection("jdbc:odbc:cse");
            Statement stmt1, stmt2, stmt3;
                     System.out.println("Statements created");
            conn.setAutoCommit(false);
            String query1 = " update registration set id='105' " + 
                            "where first = 'Sumit' ";
            String query2 = " update registration set id='106' " + 
                            "where first = 'Zayed' ";
             System.out.println(" Queries created");


            stmt1 = conn.createStatement();
            System.out.println(" Connection created");
            Savepoint s1 = conn.setSavepoint("sp1");
             System.out.println(" Savept created");

            stmt2 = conn.createStatement();

            stmt1.executeUpdate(query1);
            stmt2.executeUpdate(query2);

            conn.commit();

            stmt3 = conn.createStatement();

            stmt1.close();
            stmt2.close();
            conn.releaseSavepoint(s1);
            conn.close();

错误是语句已创建查询已创建连接已创建错误: java.lang.UnsupportedOperationException

Answer 1

JDBC-ODBC Bridge显然根本不支持保存点。但是，UCanAccess JDBC驱动程序支持未命名的保存点：

String connStr = "jdbc:ucanaccess://C:/__tmp/test.mdb";
try (Connection conn = DriverManager.getConnection(connStr)) {
    conn.setAutoCommit(false);
    try (Statement s = conn.createStatement()) {
        s.executeUpdate("UPDATE ucaTest SET Field2='NEWVALUE1' WHERE ID=1");
    }
    java.sql.Savepoint sp1 = conn.setSavepoint();
    try (Statement s = conn.createStatement()) {
        s.executeUpdate("UPDATE ucaTest SET Field2='NEWVALUE2' WHERE ID=2");
    }
    conn.rollback(sp1);
    conn.commit();
} catch (Exception e) {
    e.printStackTrace(System.out);
}

有关使用UCanAccess的更多信息，请参见

Manipulating an Access database from Java without ODBC