标签：nal color title model 多个参数 integer 参数 tis href
之前文章中对in的用法做过讲解：《MyBatis(四)：mybatis中使用in查询时的注意事项》
实际上对于多个参数的用法也是这是注意的：
@Options(useCache = true, flushCache = Options.FlushCachePolicy.FALSE, timeout = 60000) @Select(value = { "<script>", " SELECT `id`,`title` ", " FROM `tb_article` ", " WHERE `category_id`=#{article.categoryId} ", " <if test=‘article.status!=null‘>", " AND `status` = #{article.status} ", " </if>", " <if test=‘typeList!=null and !typeList.isEmpty()‘>", " and `article_type` in", " <foreach collection=\"typeList\" index=\"index\" item=\"item\" open=\"(\" separator=\",\" close=\")\">", " #{item} ", " </foreach>", " </if>", "</script>" }) @ResultMap(value = {"articleResultMap"}) List<AreaPo> queryByCondition(final @Param("article") ArticleModel article, final @Param("typeList") List<Integer> typeList);
1）上边主要对普通参数判断空用法：<if test=‘article.status!=null‘>
2）集合判空的用法：<if test=‘typeList!=null and !typeList.isEmpty()‘>
3）in的用法：<foreach collection=\"typeList\" index=\"index\" item=\"item\" open=\"(\" separator=\",\" close=\")\">"；
4）多参数用法，实际上多个参数如果使用@SqlProvider方式是，在ArticleSqlProvider的类中方法中接收的参数对象为Map<String,Object>,该map集合中包含两个对象：key:article的ArticleModel对象；key:typeList的List<Integer>对象。获取方式：ArticleModel aritlce=(ArticleModel)map.get("aritcle");List<Integer> typeList=(List<Integer>)map.get("typeList");。
标签：nal color title model 多个参数 integer 参数 tis href
原文地址：https://www.cnblogs.com/yy3b2007com/p/12026407.html
