商品数量统计

src/main/java/cn/chjyj/szwh/mapper/GoodsMapper.java

@@ -6,6 +6,7 @@ import org.apache.ibatis.annotations.Param;
 import org.springframework.stereotype.Component;
 
 import java.util.List;
+import java.util.Map;
 
 /**
  * 商品mapper
@@ -26,4 +27,11 @@ public interface GoodsMapper {
      * @return
      */
     Goods getGoodsByIsli(String goodsIsli);
+
+    /**
+     * 根据条件统计数量
+     * @param map
+     * @return
+     */
+    int goodsCount(@Param("map") Map map);
 }

src/main/resources/mapper/szwh/GoodsMapper.xml

@@ -12,13 +12,17 @@
     </sql>
     <sql id="tbName">goods</sql>
 
-
-    <!--分页查询商品列表-->
-    <!--    <select id="getGoodsList" parameterType="java.lang.Integer" resultType="cn.chjyj.szwh.bean.Goods">-->
-    <!--        SELECT <include refid="column"/> -->
-    <!--        FROM <include refid=""></include>-->
-    <!--    </select>-->
-
+    <!--  统计条件总数  -->
+    <select id="goodsCount" parameterType="java.util.Map" resultType="java.lang.Integer">
+        select count(*) from <include refid="tbName"/>
+        <where>
+            <foreach collection="map" item="v" index="k" separator="and">
+                <if test="v != null and v != ''">
+                    ${k} = #{v}
+                </if>
+            </foreach>
+        </where>
+    </select>
     <!--查询记录列表-->
     <select id="getGoodsList" parameterType="java.lang.Integer" resultType="cn.chjyj.szwh.bean.Goods">
         select * from (

src/test/java/cn/chjyj/szwh/mapper/GoodsMapperTest.java

@@ -8,7 +8,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 import static org.junit.Assert.*;
 
@@ -31,4 +33,15 @@ public class GoodsMapperTest {
         Goods goods = goodsMapper.getGoodsByIsli(gc);
         System.out.println(goods.toString());
     }
+
+    /**
+     * 条件统计
+     */
+    @Test
+    public void countTest(){
+       Map map = new HashMap<>();
+       map.put("is_deleted",0);
+       int ret = goodsMapper.goodsCount(map);
+        System.out.println(ret);
+    }
 }