线程“主”中的异常java.lang.NoClassDefFoundError：org / apache / commons / lang / builder / CompareToBuilder

package myJavaPrograms;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class AccessDBFiles {
    public static void main(String[] args) throws SQLException  {
        Connection conn=DriverManager.getConnection(
                "jdbc:ucanaccess://C:\\TESTFILE\\Database11.accdb");
        Statement s = conn.createStatement();
        ResultSet rs = s.executeQuery("SELECT * FROM myTable");
        while (rs.next()) {
            System.out.println(rs.getString(1));
        }
    }

我在线程main中得到异常，作为线程“ main”中的异常java.lang.NoClassDefFoundError：org / apache / commons / lang / builder / CompareToBuilder