public <T> T single(ResultSetHandler<T> handler) {
        try {
            return sqlTemplate.query(getSQL(), handler, params.toArray());
        } catch (Exception e) {
            throw new JdbcException("Select SQL Error:" + getSQL(), e);
        }
    }
@author Robert HG (254963746@qq.com) on 3/8/16.
lts-core/src/main/java/com/github/ltsopensource/store/jdbc/builder/SelectSql.java