中文XML论坛--请大家帮我解决这个问题吧，急啊1!

贴子主题：请大家帮我解决这个问题吧，急啊1!

本主题类别:

下面视我将owl导入mysql数据库的程序：
import java.io.*;
import com.hp.hpl.jena.db.*;
import com.hp.hpl.jena.rdf.model.*;

/**
*
*/
public class ImportPaper {

/** MySQL driver classname */
private static final String mysqlDriver = "com.mysql.jdbc.Driver";

  /** URL of database to use */
  private static final String DB_URL = "jdbc:mysql://localhost/test2?useUnicode=yes&characterEncoding=utf8";
  private static final String DB_TYPE = "MySQL";

  /** User credentials */
  private static final String DB_USER = "root";
  private static final String DB_PASSWORD = "ss";

/** Name of the Jena model to create */
private static final String MODEL_NAME = "test2";

/** Locations of wordnet graphs to load */
private static String FILE = "document.owl";

  /**
   * Creates a MySQL backed model and reads the wordnet RDF files into it
   */
  public static void main(String args[]) {

    try {
      // Instantiate database driver
      Class.forName(mysqlDriver);
    } catch (ClassNotFoundException e) {
      System.err.println("MySQL driver class not found");
      System.exit(-1);
    }

// Get a connection to the db
DBConnection connection = new DBConnection(DB_URL, DB_USER, DB_PASSWORD, DB_TYPE);

// Get a ModelMaker for database-backed models
ModelMaker maker = ModelFactory.createModelRDBMaker(connection);

// Create a new model named "document".
Model paperModel = maker.createModel(MODEL_NAME,true);

try {

      // Importing models inside a transaction helps performance.
      // Without this, the model each statement is auto-committed as it is
      // added.
      paperModel.begin();

      // Read each of the three WordNet documents into the model
      readFileIntoModel(FILE, paperModel);

      // Commit the transaction
      paperModel.commit();

    } catch (FileNotFoundException e) {

System.err.println(e.toString());
} finally {

      try {
        // Close the database connection
        connection.close();
      } catch (java.sql.SQLException e) {}
    }
  }

  /**
   * Reads RDF from a file into a model
   * @param filename Name of the RDF file to read
   * @param model The model to read the RDF into
   * @throws FileNotFoundException if the file can't be located on the classpath
   */
  private static void readFileIntoModel(String filename, Model model)
    throws FileNotFoundException {

// Use the class loader to find the input file
InputStream in = ImportPaper.class.getClassLoader().getResourceAsStream(filename);

      if (in == null) {
        throw new FileNotFoundException("File not found on classpath: "+ filename);
      }

      // Read the triples from the file into the model
      model.read(in,null);
    }
}
报错信息就只有ERROR [main] (RDFDefaultErrorHandler.java:40) - Exception during database access

我上网查感觉好像是字符编码的问题，可是实在视不知道具体怎么解决，
谢谢


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