1. script标签
@Select({"<script>", "SELECT * FROM tbl_order", "WHERE 1=1", "<when test='title!=null'>", "AND mydate = #{mydate}", "</when>", "</script>"})
2、用Provider去实现SQL拼接，例如：
public class OrderProvider { private final String TBL_ORDER = "tbl_order"; public String queryOrderByParam(OrderPara param) { SQL sql = new SQL().SELECT("*").FROM(TBL_ORDER); String room = param.getRoom(); if (StringUtils.hasText(room)) { sql.WHERE("room LIKE #{room}"); } Date myDate = param.getMyDate(); if (myDate != null) { sql.WHERE("mydate LIKE #{mydate}"); } return sql.toString(); } } public interface OrderDAO { @SelectProvider(type = OrderProvider.class, method = "queryOrderByParam") List<Order> queryOrderByParam(OrderParam param); }