/* 返回SQLBuilder工厂,并创建SQLBuilder对象 */
SQLBuilder sqlBuilder = transaction.getSQLBuilderFactory("SampleDataSource").create("");
try{
/* 开始事务 */
transaction.begin();
Condition condi = new Condition();
condi.add(new ConditionItem("ID","=",id));
SQL sql = sqlBuilder.constructSQLForUpdate("Messages", messagesHM, condi);